OFFIS DCMTK  Version 3.6.0
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DcmItem Class Reference

a class representing a list of DICOM elements in which each element has a different tag and elements are maintained in increasing order of tags. More...

Inheritance diagram for DcmItem:
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Collaboration diagram for DcmItem:
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Public Member Functions

 DcmItem ()
 default constructor
 
 DcmItem (const DcmTag &tag, const Uint32 len=0)
 constructor.
 
 DcmItem (const DcmItem &old)
 copy constructor
 
DcmItemoperator= (const DcmItem &obj)
 assignment operator.
 
virtual ~DcmItem ()
 destructor
 
virtual DcmObjectclone () const
 clone method
 
virtual OFCondition copyFrom (const DcmObject &rhs)
 Virtual object copying.
 
virtual DcmEVR ident () const
 get type identifier
 
virtual unsigned long getVM ()
 get value multiplicity
 
virtual unsigned long card () const
 get cardinality of this item
 
virtual OFBool isLeaf () const
 check if this element is a leaf node in a dataset tree.
 
virtual void print (STD_NAMESPACE ostream &out, const size_t flags=0, const int level=0, const char *pixelFileName=NULL, size_t *pixelCounter=NULL)
 print all elements of the item to a stream
 
virtual Uint32 calcElementLength (const E_TransferSyntax xfer, const E_EncodingType enctype)
 calculate the length of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.
 
virtual Uint32 getLength (const E_TransferSyntax xfer=EXS_LittleEndianImplicit, const E_EncodingType enctype=EET_UndefinedLength)
 calculate the value length (without attribute tag, VR and length field) of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.
 
virtual void transferInit ()
 initialize the transfer state of this object.
 
virtual void transferEnd ()
 finalize the transfer state of this object.
 
virtual OFBool canWriteXfer (const E_TransferSyntax newXfer, const E_TransferSyntax oldXfer)
 check if this DICOM object can be encoded in the given transfer syntax.
 
virtual OFCondition read (DcmInputStream &inStream, const E_TransferSyntax ixfer, const E_GrpLenEncoding glenc=EGL_noChange, const Uint32 maxReadLength=DCM_MaxReadLength)
 This function reads the information of all attributes which are captured in the input stream and captures this information in elementList.
 
virtual OFCondition write (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype, DcmWriteCache *wcache)
 write object to a stream
 
virtual OFCondition writeXML (STD_NAMESPACE ostream &out, const size_t flags=0)
 write object in XML format
 
virtual OFCondition writeSignatureFormat (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype, DcmWriteCache *wcache)
 special write method for creation of digital signatures
 
virtual OFBool containsUnknownVR () const
 returns true if the object contains an element with Unknown VR at any nesting level
 
virtual OFBool containsExtendedCharacters (const OFBool checkAllStrings=OFFalse)
 check if this object contains non-ASCII characters at any nesting level
 
virtual OFBool isAffectedBySpecificCharacterSet () const
 check if this object is affected by SpecificCharacterSet at any nesting level.
 
virtual OFCondition insert (DcmElement *elem, OFBool replaceOld=OFFalse, OFBool checkInsertOrder=OFFalse)
 insert a new element into the list of elements maintained by this item.
 
virtual DcmElementgetElement (const unsigned long num)
 access an element from the item.
 
virtual OFCondition nextObject (DcmStack &stack, const OFBool intoSub)
 this method enables a stack based, depth-first traversal of a complete hierarchical DICOM dataset (that is, classes derived from DcmItem or DcmSequenceOfItems).
 
virtual DcmObjectnextInContainer (const DcmObject *obj)
 this method is only used in container classes, that is, DcmItem and DcmSequenceOfItems.
 
virtual DcmElementremove (const unsigned long num)
 remove element from list.
 
virtual DcmElementremove (DcmObject *elem)
 remove element from list.
 
virtual DcmElementremove (const DcmTagKey &tag)
 remove element from list.
 
virtual OFBool isEmpty (const OFBool normalize=OFTrue)
 check if this item is empty
 
virtual OFCondition clear ()
 clear (remove) attribute value
 
virtual OFCondition verify (const OFBool autocorrect=OFFalse)
 check the currently stored element value
 
virtual OFCondition search (const DcmTagKey &xtag, DcmStack &resultStack, E_SearchMode mode=ESM_fromHere, OFBool searchIntoSub=OFTrue)
 a complex, stack-based, hierarchical search method.
 
virtual OFCondition loadAllDataIntoMemory ()
 this method loads all attribute values maintained by this object and all sub-objects (in case of a container such as DcmDataset) into memory.
 
virtual OFCondition computeGroupLengthAndPadding (const E_GrpLenEncoding glenc, const E_PaddingEncoding padenc=EPD_noChange, const E_TransferSyntax xfer=EXS_Unknown, const E_EncodingType enctype=EET_ExplicitLength, const Uint32 padlen=0, const Uint32 subPadlen=0, Uint32 instanceLength=0)
 This function takes care of group length and padding elements in the current element list according to what is specified in glenc and padenc.
 
OFBool tagExists (const DcmTagKey &key, OFBool searchIntoSub=OFFalse)
 check if an element with the given attribute tag exists in the dataset
 
OFBool tagExistsWithValue (const DcmTagKey &key, OFBool searchIntoSub=OFFalse)
 check if an element with the given attribute tag exists in the dataset and has a non-empty value (i.e., length > 0)
 
OFCondition findAndGetElement (const DcmTagKey &tagKey, DcmElement *&element, const OFBool searchIntoSub=OFFalse, const OFBool createCopy=OFFalse)
 find element and get a pointer to it (or copy it).
 
OFCondition findAndGetElements (const DcmTagKey &tagKey, DcmStack &resultStack)
 find all elements matching a particular tag and return references to them on a stack.
 
OFCondition findAndGetString (const DcmTagKey &tagKey, const char *&value, const OFBool searchIntoSub=OFFalse)
 find element and get value as a reference to a C string.
 
OFCondition findAndGetOFString (const DcmTagKey &tagKey, OFString &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
 find element and get value as a C++ string (only one component).
 
OFCondition findAndGetOFStringArray (const DcmTagKey &tagKey, OFString &value, const OFBool searchIntoSub=OFFalse)
 find element and get value as a C++ string (all components).
 
OFCondition findAndGetUint8 (const DcmTagKey &tagKey, Uint8 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
 find element and get value as an unsigned 8-bit integer.
 
OFCondition findAndGetUint8Array (const DcmTagKey &tagKey, const Uint8 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
 find element and get value as an array of unsigned 8-bit integers.
 
OFCondition findAndGetUint16 (const DcmTagKey &tagKey, Uint16 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
 find element and get value as an unsigned 16-bit integer.
 
OFCondition findAndGetUint16Array (const DcmTagKey &tagKey, const Uint16 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
 find element and get value as an array of unsigned 16-bit integers.
 
OFCondition findAndGetSint16 (const DcmTagKey &tagKey, Sint16 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
 find element and get value as a signed 16-bit integer.
 
OFCondition findAndGetSint16Array (const DcmTagKey &tagKey, const Sint16 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
 find element and get value as an array of signed 16-bit integers.
 
OFCondition findAndGetUint32 (const DcmTagKey &tagKey, Uint32 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
 find element and get value as an unsigned 32-bit integer.
 
OFCondition findAndGetUint32Array (const DcmTagKey &tagKey, const Uint32 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
 find element and get value as an array of unsigned 32-bit integers.
 
OFCondition findAndGetSint32 (const DcmTagKey &tagKey, Sint32 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
 find element and get value as a signed 32-bit integer.
 
OFCondition findAndGetSint32Array (const DcmTagKey &tagKey, const Sint32 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
 find element and get value as an array of signed 32-bit integers.
 
OFCondition findAndGetLongInt (const DcmTagKey &tagKey, long int &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
 find element and get value as a (signed) long integer.
 
OFCondition findAndGetFloat32 (const DcmTagKey &tagKey, Float32 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
 find element and get value as a 32-bit floating point.
 
OFCondition findAndGetFloat32Array (const DcmTagKey &tagKey, const Float32 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
 find element and get value as an array of 32-bit floating point values.
 
OFCondition findAndGetFloat64 (const DcmTagKey &tagKey, Float64 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
 find element and get value as a 64-bit floating point.
 
OFCondition findAndGetFloat64Array (const DcmTagKey &tagKey, const Float64 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
 find element and get value as an array of 64-bit floating point values.
 
OFCondition findAndGetSequence (const DcmTagKey &seqTagKey, DcmSequenceOfItems *&sequence, const OFBool searchIntoSub=OFFalse, const OFBool createCopy=OFFalse)
 looks up and returns a given sequence.
 
OFCondition findAndGetSequenceItem (const DcmTagKey &seqTagKey, DcmItem *&item, const signed long itemNum=0, const OFBool createCopy=OFFalse)
 looks up and returns a given sequence item, if it exists.
 
OFCondition findOrCreateSequenceItem (const DcmTag &seqTag, DcmItem *&item, const signed long itemNum=0)
 looks up the given sequence in the current dataset and returns the given item.
 
OFCondition findAndInsertCopyOfElement (const DcmTagKey &tagKey, DcmItem *destItem, const OFBool replaceOld=OFTrue)
 find element, create a copy and insert it into the given destination dataset.
 
OFCondition findAndDeleteElement (const DcmTagKey &tagKey, const OFBool allOccurrences=OFFalse, const OFBool searchIntoSub=OFFalse)
 find element, remove it from the dataset and free the associated memory.
 
OFCondition findAndDeleteSequenceItem (const DcmTagKey &seqTagKey, const signed long itemNum)
 looks up the given sequence in the current dataset and deletes the given item.
 
OFCondition putAndInsertString (const DcmTag &tag, const char *value, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertOFStringArray (const DcmTag &tag, const OFString &value, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertUint8Array (const DcmTag &tag, const Uint8 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertUint16 (const DcmTag &tag, const Uint16 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertUint16Array (const DcmTag &tag, const Uint16 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertSint16 (const DcmTag &tag, const Sint16 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertSint16Array (const DcmTag &tag, const Sint16 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertUint32 (const DcmTag &tag, const Uint32 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertSint32 (const DcmTag &tag, const Sint32 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertFloat32 (const DcmTag &tag, const Float32 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition putAndInsertFloat64 (const DcmTag &tag, const Float64 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
 create a new element, put specified value to it and insert the element into the dataset/item.
 
OFCondition insertEmptyElement (const DcmTag &tag, const OFBool replaceOld=OFTrue)
 create a new element (with no value) and insert it into the dataset/item.
 
OFCondition insertSequenceItem (const DcmTag &seqTag, DcmItem *item, const signed long itemNum=-2)
 looks up the given sequence in the current dataset and inserts the given item.
 
- Public Member Functions inherited from DcmObject
 DcmObject (const DcmTag &tag, const Uint32 len=0)
 constructor.
 
 DcmObject (const DcmObject &obj)
 copy constructor
 
virtual ~DcmObject ()
 destructor
 
DcmObjectoperator= (const DcmObject &obj)
 copy assignment operator
 
DcmEVR getVR () const
 return the value representation assigned to this object.
 
OFBool isaString () const
 check if this element is a string type, based on the VR.
 
E_TransferState transferState () const
 return the current transfer (read/write) state of this object.
 
Uint16 getGTag () const
 return the group number of the attribute tag for this object
 
Uint16 getETag () const
 return the element number of the attribute tag for this object
 
const DcmTaggetTag () const
 return const reference to the attribute tag for this object
 
void setGTag (Uint16 gtag)
 assign group tag (but not element tag) of the attribute tag for this object.
 
virtual OFCondition setVR (DcmEVR)
 assign a new Value Representation (VR) to this object.
 
virtual OFBool isSignable () const
 returns true if the current object may be included in a digital signature
 
Uint32 getLengthField () const
 return the current value of the Length field (which is different from the functionality of the public getLength method).
 

Protected Member Functions

OFCondition readTagAndLength (DcmInputStream &inStream, const E_TransferSyntax xfer, DcmTag &tag, Uint32 &length, Uint32 &bytesRead)
 This function reads tag and length information from inStream and returns this information to the caller.
 
OFCondition readSubElement (DcmInputStream &inStream, DcmTag &newTag, const Uint32 newLength, const E_TransferSyntax xfer, const E_GrpLenEncoding glenc, const Uint32 maxReadLength=DCM_MaxReadLength)
 This function creates a new DcmElement object on the basis of the newTag and newLength information which was passed, inserts this new element into elementList, reads the actual data value which belongs to this element (attribute) from the inStream and also assigns this information to the object which was created at the beginning.
 
E_TransferSyntax checkTransferSyntax (DcmInputStream &inStream)
 This function reads the first 6 bytes from the input stream and determines the transfer syntax which was used to code the information in the stream.
 
void checkAndUpdateVR (DcmItem &item, DcmTag &tag)
 check whether the given tag requires some special handling regarding the VR (i.e.
 
- Protected Member Functions inherited from DcmObject
void printNestingLevel (STD_NAMESPACE ostream &out, const size_t flags, const int level)
 print line indentation, e.g.
 
void printInfoLineStart (STD_NAMESPACE ostream &out, const size_t flags, const int level, DcmTag *tag=NULL)
 print beginning of the info line.
 
void printInfoLineEnd (STD_NAMESPACE ostream &out, const size_t flags, const unsigned long printedLength=0xffffffff, DcmTag *tag=NULL)
 print end of the info line.
 
virtual void printInfoLine (STD_NAMESPACE ostream &out, const size_t flags, const int level=0, const char *info=NULL, DcmTag *tag=NULL, const OFBool isInfo=OFTrue)
 print given text with element information.
 
virtual OFCondition writeTagAndLength (DcmOutputStream &outStream, const E_TransferSyntax oxfer, Uint32 &writtenBytes) const
 write tag, VR and length field to the given output stream
 
virtual Uint32 getTagAndLengthSize (const E_TransferSyntax oxfer) const
 return the number of bytes needed to serialize the tag, VR and length information of the current object using the given transfer syntax.
 
const char * getTagName ()
 return the DICOM attribute tag name for this object.
 
void setTagVR (DcmEVR vr)
 set the VR for this attribute
 
E_TransferState getTransferState () const
 return the current transfer state of this object during serialization/deserialization
 
void setTransferState (E_TransferState newState)
 set the current transfer state of this object during serialization/deserialization
 
Uint32 getTransferredBytes () const
 return the number of transferred bytes for this object during serialization/deserialization
 
void setTransferredBytes (Uint32 val)
 set the number of transferred bytes for this object during serialization/deserialization
 
void incTransferredBytes (Uint32 val)
 add to the number of transferred bytes for this object during serialization/deserialization
 
void setLengthField (Uint32 val)
 set the current value of the Length field
 

Protected Attributes

DcmListelementList
 the list of elements maintained by this object
 
OFBool lastElementComplete
 flag used during suspended I/O.
 
offile_off_t fStartPosition
 used during reading.
 
- Protected Attributes inherited from DcmObject
OFCondition errorFlag
 error flag for this object.
 

Private Member Functions

OFCondition searchSubFromHere (const DcmTagKey &tag, DcmStack &resultStack, OFBool searchIntoSub)
 helper function for search().
 

Static Private Member Functions

static OFBool foundVR (const Uint8 *atposition)
 helper function that interprets the given pointer as a pointer to an array of two characters and checks whether these two characters form a valid standard DICOM VR.
 

Private Attributes

DcmPrivateTagCache privateCreatorCache
 cache for private creator tags and names
 

Additional Inherited Members

- Static Protected Member Functions inherited from DcmObject
static OFCondition writeTag (DcmOutputStream &outStream, const DcmTag &tag, const E_TransferSyntax oxfer)
 static helper function that writes a given attribute tag to a binary output stream using the byte order indicated by the transfer syntax.
 

Detailed Description

a class representing a list of DICOM elements in which each element has a different tag and elements are maintained in increasing order of tags.

In particular, a sequence item.

Definition at line 51 of file dcitem.h.

Constructor & Destructor Documentation

DcmItem::DcmItem ( const DcmTag tag,
const Uint32  len = 0 
)

constructor.

Create new item from given tag and length.

Parameters
tagDICOM tag for the new element
lenvalue length for the new element
DcmItem::DcmItem ( const DcmItem old)

copy constructor

Parameters
olditem to be copied

Member Function Documentation

virtual Uint32 DcmItem::calcElementLength ( const E_TransferSyntax  xfer,
const E_EncodingType  enctype 
)
virtual

calculate the length of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.

For elements, the length includes the length of the tag, length field, VR field and the value itself, for items and sequences it returns the length of the complete item or sequence including delimitation tags if applicable. If length encodig is set to be explicit and the total item size is larger than the available 32-bit length field, then undefined length is returned. If "dcmWriteOversizedSeqsAndItemsImplicit" is disabled, also the internal DcmObject errorFlag is set to EC_SeqOrItemContentOverflow in case the item content (excluding tag header etc.) is already too large.

Parameters
xfertransfer syntax for length calculation
enctypesequence encoding type for length calculation
Returns
length of DICOM element

Implements DcmObject.

Reimplemented in DcmMetaInfo, and DcmDataset.

virtual OFBool DcmItem::canWriteXfer ( const E_TransferSyntax  newXfer,
const E_TransferSyntax  oldXfer 
)
virtual

check if this DICOM object can be encoded in the given transfer syntax.

Parameters
newXfertransfer syntax in which the DICOM object is to be encoded
oldXfertransfer syntax in which the DICOM object was read or created.
Returns
true if object can be encoded in desired transfer syntax, false otherwise.

Implements DcmObject.

Reimplemented in DcmDataset.

virtual unsigned long DcmItem::card ( ) const
virtual

get cardinality of this item

Returns
number of elements in this item
void DcmItem::checkAndUpdateVR ( DcmItem item,
DcmTag tag 
)
protected

check whether the given tag requires some special handling regarding the VR (i.e.

in case it is undefined and multiple values are possible). If required, the VR of the given element tag is then updated according to the DICOM standard, e.g. the VR of PixelPaddingValue (if undefined) is set to 'SS' or 'US' depending on the value of PixelRepresentation.

Parameters
itemdataset or item that can be used to lookup other element values
tagtag of the element to be checked and updated (if required)
E_TransferSyntax DcmItem::checkTransferSyntax ( DcmInputStream inStream)
protected

This function reads the first 6 bytes from the input stream and determines the transfer syntax which was used to code the information in the stream.

The decision is based on two questions: a) Did we encounter a valid tag? and b) Do the last 2 bytes which were read from the stream represent a valid VR? In certain special cases, where the transfer syntax cannot be determined without doubt, we want to guess the most likely transfer syntax (see code).

Parameters
inStreamThe stream which contains the coded information.
Returns
The transfer syntax which was determined.
virtual OFCondition DcmItem::clear ( )
virtual

clear (remove) attribute value

Returns
EC_Normal if successful, an error code otherwise

Implements DcmObject.

Reimplemented in DcmDataset.

virtual DcmObject* DcmItem::clone ( ) const
inlinevirtual

clone method

Returns
deep copy of this object

Implements DcmObject.

Reimplemented in DcmDirectoryRecord, DcmMetaInfo, and DcmDataset.

Definition at line 86 of file dcitem.h.

References DcmItem().

virtual OFCondition DcmItem::computeGroupLengthAndPadding ( const E_GrpLenEncoding  glenc,
const E_PaddingEncoding  padenc = EPD_noChange,
const E_TransferSyntax  xfer = EXS_Unknown,
const E_EncodingType  enctype = EET_ExplicitLength,
const Uint32  padlen = 0,
const Uint32  subPadlen = 0,
Uint32  instanceLength = 0 
)
virtual

This function takes care of group length and padding elements in the current element list according to what is specified in glenc and padenc.

If required, this function does the following two things: a) it calculates the group length of all groups which are contained in this item and sets the calculated values in the corresponding group length elements and b) it inserts a corresponding padding element (or, in case of sequences: padding elements) with a corresponding correct size into the element list.

Parameters
glencEncoding type for group length; specifies what shall be done with group length tags.
padencEncoding type for padding; specifies what shall be done with padding tags.
xferThe transfer syntax that shall be used.
enctypeEncoding type for sequences; specifies how sequences will be handled.
padlenThe length up to which the dataset shall be padded, if padding is desired.
subPadlenFor sequences (ie sub elements), the length up to which item shall be padded, if padding is desired.
instanceLengthNumber of extra bytes added to the item/dataset length used when computing the padding; this parameter is for instance used to pass the length of the file meta header from the DcmFileFormat to the DcmDataset object.
Returns
status, EC_Normal if successful, an error code otherwise
virtual OFBool DcmItem::containsExtendedCharacters ( const OFBool  checkAllStrings = OFFalse)
virtual

check if this object contains non-ASCII characters at any nesting level

Parameters
checkAllStringsif true, also check elements with string values not affected by SpecificCharacterSet (0008,0005), default: only check PN, LO, LT, SH, ST, UT
Returns
true if object contains non-ASCII characters, false otherwise

Reimplemented from DcmObject.

virtual OFBool DcmItem::containsUnknownVR ( ) const
virtual

returns true if the object contains an element with Unknown VR at any nesting level

Returns
true if the object contains an element with Unknown VR, false otherwise

Reimplemented from DcmObject.

virtual OFCondition DcmItem::copyFrom ( const DcmObject rhs)
virtual

Virtual object copying.

This method can be used for DcmObject and derived classes to get a deep copy of an object. Internally the assignment operator is called if the given DcmObject parameter is of the same type as "this" object instance. If not, an error is returned. This function permits copying an object by value in a virtual way which therefore is different to just calling the assignment operator of DcmElement which could result in slicing the object.

Parameters
rhs- [in] The instance to copy from. Has to be of the same class type as "this" object
Returns
EC_Normal if copying was successful, error otherwise

Implements DcmObject.

Reimplemented in DcmDirectoryRecord, DcmMetaInfo, and DcmDataset.

OFCondition DcmItem::findAndDeleteElement ( const DcmTagKey tagKey,
const OFBool  allOccurrences = OFFalse,
const OFBool  searchIntoSub = OFFalse 
)

find element, remove it from the dataset and free the associated memory.

Applicable to all DICOM value representations (VR).

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
allOccurrencesflag indicating whether to delete all occurrences of the attribute tag or the first one only (implies 'searchIntoSub' to be true)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndDeleteSequenceItem ( const DcmTagKey seqTagKey,
const signed long  itemNum 
)

looks up the given sequence in the current dataset and deletes the given item.

Applicable to the following VRs: SQ, (pixelSQ)

Parameters
seqTagKeyDICOM tag specifying the sequence attribute to be searched for
itemNumnumber of the item to be deleted (0..n-1, -1 for last)
Returns
EC_Normal upon success, an error otherwise.
OFCondition DcmItem::findAndGetElement ( const DcmTagKey tagKey,
DcmElement *&  element,
const OFBool  searchIntoSub = OFFalse,
const OFBool  createCopy = OFFalse 
)

find element and get a pointer to it (or copy it).

Applicable to all DICOM value representations (VR). The result variable 'element' is automatically set to NULL if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
elementvariable in which the reference to (or copy of) the element is stored
searchIntoSubflag indicating whether to search into sequences or not
createCopycreate a copy of the element if true, return a reference otherwise
Returns
EC_Normal upon success, an error code otherwise.

Referenced by I2DOutputPlug::checkAndInventType1Attrib().

OFCondition DcmItem::findAndGetElements ( const DcmTagKey tagKey,
DcmStack resultStack 
)

find all elements matching a particular tag and return references to them on a stack.

This functions always performs a deep search (i.e. searches into sequence of items).

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
resultStackstack where references to the elements are stored (added to). If no element is found, the stack is not modified (e.g. cleared).
Returns
EC_Normal if at least one matching tag is found, an error code otherwise.
OFCondition DcmItem::findAndGetFloat32 ( const DcmTagKey tagKey,
Float32 &  value,
const unsigned long  pos = 0,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as a 32-bit floating point.

Applicable to the following VRs: FL, OF The result variable 'value' is automatically set to zero if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
posindex of the value in case of multi-valued elements (0..vm-1)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetFloat32Array ( const DcmTagKey tagKey,
const Float32 *&  value,
unsigned long *  count = NULL,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an array of 32-bit floating point values.

Applicable to the following VRs: FL, OF The result variable 'value' is automatically set to NULL if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the reference to the element value is stored
countstores number of items in the result array (if not NULL)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetFloat64 ( const DcmTagKey tagKey,
Float64 &  value,
const unsigned long  pos = 0,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as a 64-bit floating point.

Applicable to the following VRs: DS, FD The result variable 'value' is automatically set to zero if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
posindex of the value in case of multi-valued elements (0..vm-1)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetFloat64Array ( const DcmTagKey tagKey,
const Float64 *&  value,
unsigned long *  count = NULL,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an array of 64-bit floating point values.

Applicable to the following VRs: FD The result variable 'value' is automatically set to NULL if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the reference to the element value is stored
countstores number of items in the result array (if not NULL)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetLongInt ( const DcmTagKey tagKey,
long int &  value,
const unsigned long  pos = 0,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as a (signed) long integer.

Applicable to the following VRs: IS, SL, SS, UL, US The result variable 'value' is automatically set to zero if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
posindex of the value in case of multi-valued elements (0..vm-1)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetOFString ( const DcmTagKey tagKey,
OFString value,
const unsigned long  pos = 0,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as a C++ string (only one component).

Applicable to the following VRs: AE, AS, AT, CS, DA, DS, DT, FL, FD, IS, LO, LT, OB, OF, OW, PN, SH, SL, SS, ST, TM, UI, UL, US, UT Since the getOFString() routine is called internally the resulting string is normalized, i.e. leading and/or trailing spaces are removed according to the associated value representation, or the element value is converted to a character string (for non-string VRs) - see documentation in the corresponding header file. In contrast to the above and below function only the specified component (see parameter 'pos') is returned. The result variable 'value' is automatically set to an empty string if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
posindex of the value in case of multi-valued elements (0..vm-1)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetOFStringArray ( const DcmTagKey tagKey,
OFString value,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as a C++ string (all components).

Applicable to the following VRs: AE, AS, AT, CS, DA, DS, DT, FL, FD, IS, LO, LT, OB, OF, OW, PN, SH, SL, SS, ST, TM, UI, UL, US, UT Since the getOFStringArray() routine is called internally the resulting string is normalized, i.e. leading and/or trailing spaces are removed according to the associated value representation or the element values are converted to character strings (for non-string VRs) - see documentation in the corresponding header file. The result variable 'value' is automatically set to an empty string if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetSequence ( const DcmTagKey seqTagKey,
DcmSequenceOfItems *&  sequence,
const OFBool  searchIntoSub = OFFalse,
const OFBool  createCopy = OFFalse 
)

looks up and returns a given sequence.

Applicable to the following VRs: SQ, (pixelSQ) The result variable 'sequence' is automatically set to NULL if an error occurs (e.g. if 'seqTagKey' does not refer to a sequence attribute).

Parameters
seqTagKeyDICOM tag specifying the sequence attribute to be searched for
sequencevariable in which the reference to (or copy of) the sequence is stored
searchIntoSubflag indicating whether to search into sub-sequences or not
createCopycreate a copy of the sequence if true, return a reference otherwise
Returns
EC_Normal upon success, an error otherwise.
OFCondition DcmItem::findAndGetSequenceItem ( const DcmTagKey seqTagKey,
DcmItem *&  item,
const signed long  itemNum = 0,
const OFBool  createCopy = OFFalse 
)

looks up and returns a given sequence item, if it exists.

Otherwise sets 'item' to NULL and returns EC_TagNotFound (specified sequence does not exist) or EC_IllegalParameter (specified item does not exist). Only the top-most level of the dataset/item is examined (i.e. no deep-search is performed). Applicable to the following VRs: SQ, (pixelSQ)

Parameters
seqTagKeyDICOM tag specifying the sequence attribute to be searched for
itemvariable in which the reference to (or copy of) the item is stored
itemNumnumber of the item to be searched for (0..n-1, -1 for last)
createCopycreate a copy of the item if true, return a reference otherwise
Returns
EC_Normal upon success, an error otherwise.
OFCondition DcmItem::findAndGetSint16 ( const DcmTagKey tagKey,
Sint16 &  value,
const unsigned long  pos = 0,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as a signed 16-bit integer.

Applicable to the following VRs: SS The result variable 'value' is automatically set to zero if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
posindex of the value in case of multi-valued elements (0..vm-1)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetSint16Array ( const DcmTagKey tagKey,
const Sint16 *&  value,
unsigned long *  count = NULL,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an array of signed 16-bit integers.

Applicable to the following VRs: SS The result variable 'value' is automatically set to NULL if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the reference to the element value is stored
countstores number of items in the result array (if not NULL)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetSint32 ( const DcmTagKey tagKey,
Sint32 &  value,
const unsigned long  pos = 0,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as a signed 32-bit integer.

Applicable to the following VRs: IS, SL The result variable 'value' is automatically set to zero if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
posindex of the value in case of multi-valued elements (0..vm-1)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetSint32Array ( const DcmTagKey tagKey,
const Sint32 *&  value,
unsigned long *  count = NULL,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an array of signed 32-bit integers.

Applicable to the following VRs: SL The result variable 'value' is automatically set to NULL if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the reference to the element value is stored
countstores number of items in the result array (if not NULL)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetString ( const DcmTagKey tagKey,
const char *&  value,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as a reference to a C string.

Applicable to the following VRs: AE, AS, CS, DA, DS, DT, IS, LO, LT, PN, SH, ST, TM, UI, UT Since the getString() routine is called internally the resulting string reference represents the (possibly multi-valued) value as stored in the dataset, i.e. no normalization is performed. The result variable 'value' is automatically set to NULL if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the reference to the element value is stored (might be NULL)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetUint16 ( const DcmTagKey tagKey,
Uint16 &  value,
const unsigned long  pos = 0,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an unsigned 16-bit integer.

Applicable to the following VRs: OW, US The result variable 'value' is automatically set to zero if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
posindex of the value in case of multi-valued elements (0..vm-1)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetUint16Array ( const DcmTagKey tagKey,
const Uint16 *&  value,
unsigned long *  count = NULL,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an array of unsigned 16-bit integers.

Applicable to the following VRs: AT, OW, US The result variable 'value' is automatically set to NULL if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the reference to the element value is stored
countstores number of items in the result array (if not NULL)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetUint32 ( const DcmTagKey tagKey,
Uint32 &  value,
const unsigned long  pos = 0,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an unsigned 32-bit integer.

Applicable to the following VRs: UL The result variable 'value' is automatically set to zero if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
posindex of the value in case of multi-valued elements (0..vm-1)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetUint32Array ( const DcmTagKey tagKey,
const Uint32 *&  value,
unsigned long *  count = NULL,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an array of unsigned 32-bit integers.

Applicable to the following VRs: UL The result variable 'value' is automatically set to NULL if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the reference to the element value is stored
countstores number of items in the result array (if not NULL)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetUint8 ( const DcmTagKey tagKey,
Uint8 &  value,
const unsigned long  pos = 0,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an unsigned 8-bit integer.

Applicable to the following VRs: OB The result variable 'value' is automatically set to zero if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the element value is stored
posindex of the value in case of multi-valued elements (0..vm-1)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndGetUint8Array ( const DcmTagKey tagKey,
const Uint8 *&  value,
unsigned long *  count = NULL,
const OFBool  searchIntoSub = OFFalse 
)

find element and get value as an array of unsigned 8-bit integers.

Applicable to the following VRs: OB The result variable 'value' is automatically set to NULL if an error occurs.

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
valuevariable in which the reference to the element value is stored
countstores number of items in the result array (if not NULL)
searchIntoSubflag indicating whether to search into sequences or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::findAndInsertCopyOfElement ( const DcmTagKey tagKey,
DcmItem destItem,
const OFBool  replaceOld = OFTrue 
)

find element, create a copy and insert it into the given destination dataset.

This functions never performs a deep search (i.e. does not search into sequence of items). Empty elements are also copied. However, if the given tag is not found in the current dataset, EC_TagNotFound is returned and the destination dataset remains unchanged. Applicable to all DICOM value representations (VR).

Parameters
tagKeyDICOM tag specifying the attribute to be searched for
destItemdestination dataset to which the copied element is inserted
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise
OFCondition DcmItem::findOrCreateSequenceItem ( const DcmTag seqTag,
DcmItem *&  item,
const signed long  itemNum = 0 
)

looks up the given sequence in the current dataset and returns the given item.

If either the sequence or the item do not exist, they are created. If necessary, multiple empty items are inserted. Only the top-most level of the dataset/item is examined (i.e. no deep-search is performed). Applicable to the following VRs: SQ, (pixelSQ)

Parameters
seqTagDICOM tag specifying the sequence attribute to be searched for (or to be created)
itemvariable in which the reference to the sequence item is stored
itemNumnumber of the item to be searched for (0..n-1, -1 for last, -2 for append new)
Returns
EC_Normal upon success, an error otherwise.
static OFBool DcmItem::foundVR ( const Uint8 *  atposition)
staticprivate

helper function that interprets the given pointer as a pointer to an array of two characters and checks whether these two characters form a valid standard DICOM VR.

Parameters
atpositionpointer to array of (at least) two bytes interpreted as VR
Returns
true if standard VR, false otherwise
virtual DcmElement* DcmItem::getElement ( const unsigned long  num)
virtual

access an element from the item.

This method returns a pointer to one of the elements in the item, and not a copy.

Parameters
numindex number of element, must be < card()
Returns
pointer to element if found, NULL if num >= card()
virtual Uint32 DcmItem::getLength ( const E_TransferSyntax  xfer = EXS_LittleEndianImplicit,
const E_EncodingType  enctype = EET_UndefinedLength 
)
virtual

calculate the value length (without attribute tag, VR and length field) of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.

If length encodig is set to be explicit and the item content is larger than the available 32-bit length field, then undefined length is returned. If "dcmWriteOversizedSeqsAndItemsUndefined" is disabled, also the internal DcmObject errorFlag is set to EC_SeqOrItemContentOverflow.

Parameters
xfertransfer syntax for length calculation
enctypesequence encoding type for length calculation
Returns
value length of DICOM element

Implements DcmObject.

virtual unsigned long DcmItem::getVM ( )
virtual

get value multiplicity

Returns
always returns 1 (according to the DICOM standard)

Implements DcmObject.

virtual DcmEVR DcmItem::ident ( ) const
virtual

get type identifier

Returns
type identifier of this class (EVR_item)

Implements DcmObject.

Reimplemented in DcmDirectoryRecord, DcmMetaInfo, and DcmDataset.

virtual OFCondition DcmItem::insert ( DcmElement elem,
OFBool  replaceOld = OFFalse,
OFBool  checkInsertOrder = OFFalse 
)
virtual

insert a new element into the list of elements maintained by this item.

The list of elements is always kept in ascending tag order.

Parameters
elemelement to be inserted, must not be contained in this or any other item. Will be deleted upon destruction of this item object.
replaceOldif true, this element replaces any other element with the same tag which may already be contained in the item. If false, insert fails if another element with the same tag is already present.
checkInsertOrderif true, a warning message is sent to the console if the element is not inserted at the end of the list. This is used in the read() method to detect datasets with out-of-order elements.
Returns
status, EC_Normal if successful, an error code otherwise

Referenced by I2DOutputPlug::checkAndInventType1Attrib(), and I2DOutputPlug::checkAndInventType2Attrib().

OFCondition DcmItem::insertEmptyElement ( const DcmTag tag,
const OFBool  replaceOld = OFTrue 
)

create a new element (with no value) and insert it into the dataset/item.

Applicable to the following VRs: AE, AS, AT, CS, DA, DS, DT, FL, FD, IS, LO, LT, OB, OF, OW, PN, SH, SL, SQ, SS, ST, TM, UI, UL, US, UT

Parameters
tagDICOM tag specifying the attribute to be created
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::insertSequenceItem ( const DcmTag seqTag,
DcmItem item,
const signed long  itemNum = -2 
)

looks up the given sequence in the current dataset and inserts the given item.

If the sequence does not exist, it is created. If necessary, multiple empty items are inserted before the specified item position. Only the top-most level of the dataset/item is examined (i.e. no deep-search is performed). Applicable to the following VRs: SQ, (pixelSQ)

Parameters
seqTagDICOM tag specifying the sequence attribute to be searched for (or to be created)
itemitem to be inserted into the sequence, must not be contained in this or any other sequence. Will be deleted upon destruction of the sequence object.
itemNumposition of the item (0..n-1, -1 = before last, -2 = after last)
Returns
EC_Normal upon success, an error otherwise (delete 'item' manually!).
virtual OFBool DcmItem::isAffectedBySpecificCharacterSet ( ) const
virtual

check if this object is affected by SpecificCharacterSet at any nesting level.

In detail, it is checked whether this object contains any data elements that according to their VR are affected by the SpecificCharacterSet (0008,0005) element. This is true for the following VRs: PN, LO, LT, SH, ST and UT

Returns
true if object is affected by SpecificCharacterSet, false otherwise

Reimplemented from DcmObject.

virtual OFBool DcmItem::isEmpty ( const OFBool  normalize = OFTrue)
virtual

check if this item is empty

Parameters
normalizenot used for this class
Returns
true if item is empty, i.e. has no elements, false otherwise

Reimplemented from DcmObject.

virtual OFBool DcmItem::isLeaf ( ) const
inlinevirtual

check if this element is a leaf node in a dataset tree.

All subclasses of DcmElement except for DcmSequenceOfItems are leaf nodes, while DcmSequenceOfItems, DcmItem, DcmDataset etc. are not.

Returns
true if leaf node, false otherwise.

Implements DcmObject.

Definition at line 126 of file dcitem.h.

virtual OFCondition DcmItem::loadAllDataIntoMemory ( )
virtual

this method loads all attribute values maintained by this object and all sub-objects (in case of a container such as DcmDataset) into memory.

After a call to this method, the file from which a dataset was read may safely be deleted or replaced. For large files, this method may obviously allocate large amounts of memory.

Returns
EC_Normal if successful, an error code otherwise

Implements DcmObject.

virtual DcmObject* DcmItem::nextInContainer ( const DcmObject obj)
virtual

this method is only used in container classes, that is, DcmItem and DcmSequenceOfItems.

It returns a pointer to the next object in the list AFTER the given object. If the caller passes NULL, a pointer to the first object in the list is returned. If the given object is not found, the given object is the last one in the list or the list is empty, NULL is returned.

Parameters
objpointer to one object in the container; we are looking for the next entry after this one. NULL if looking for the first entry.
Returns
pointer to next object in container or NULL if not found

Reimplemented from DcmObject.

virtual OFCondition DcmItem::nextObject ( DcmStack stack,
const OFBool  intoSub 
)
virtual

this method enables a stack based, depth-first traversal of a complete hierarchical DICOM dataset (that is, classes derived from DcmItem or DcmSequenceOfItems).

With each call of this method, the next object in the tree is located and marked on the stack.

Parameters
stack"cursor" for current position in the dataset. The stack will contain a pointer to each dataset, sequence, item and element from the main dataset down to the current element, and is updated upon each call to this method. An empty stack is equivalent to a stack containing a pointer to this object only.
intoSubif true, the nextObject method will perform a hierarchical search through the dataset (depth-first), if false, only the current container object will be traversed (e.g., all elements of an item or all items of a sequence).
Returns
EC_Normal if value length is correct, an error code otherwise

Reimplemented from DcmObject.

DcmItem& DcmItem::operator= ( const DcmItem obj)

assignment operator.

Private creator cache is not copied as it is also the case for clone().

Parameters
theitem to be copied
virtual void DcmItem::print ( STD_NAMESPACE ostream &  out,
const size_t  flags = 0,
const int  level = 0,
const char *  pixelFileName = NULL,
size_t *  pixelCounter = NULL 
)
virtual

print all elements of the item to a stream

Parameters
outoutput stream
flagsoptional flag used to customize the output (see DCMTypes::PF_xxx)
levelcurrent level of nested items. Used for indentation.
pixelFileNamenot used
pixelCounternot used

Implements DcmObject.

Reimplemented in DcmDirectoryRecord, DcmMetaInfo, and DcmDataset.

OFCondition DcmItem::putAndInsertFloat32 ( const DcmTag tag,
const Float32  value,
const unsigned long  pos = 0,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: FL, OF

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element
posindex of the value to be set (0..vm). A value can be appended to the end of or inserted within the existing value field.
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertFloat64 ( const DcmTag tag,
const Float64  value,
const unsigned long  pos = 0,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: FD

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element
posindex of the value to be set (0..vm). A value can be appended to the end of or inserted within the existing value field.
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertOFStringArray ( const DcmTag tag,
const OFString value,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: AE, AS, CS, DA, DS, DT, IS, LO, LT, PN, SH, ST, TM, UI, UT

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element (might be empty)
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertSint16 ( const DcmTag tag,
const Sint16  value,
const unsigned long  pos = 0,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: SS, xs (US or SS)

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element
posindex of the value to be set (0..vm). A value can be appended to the end of or inserted within the existing value field.
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertSint16Array ( const DcmTag tag,
const Sint16 *  value,
const unsigned long  count,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: SS, xs (US or SS)

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element
countnumber of values (not bytes!) to be copied from 'value'
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertSint32 ( const DcmTag tag,
const Sint32  value,
const unsigned long  pos = 0,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: SL

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element
posindex of the value to be set (0..vm). A value can be appended to the end of or inserted within the existing value field.
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertString ( const DcmTag tag,
const char *  value,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: AE, AS, AT, CS, DA, DS, DT, FL, FD, IS, LO, LT, OB, OF, OW, PN, SH, SL, SS, ST, TM, UI, UL, US, UT

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element (might be empty or NULL)
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertUint16 ( const DcmTag tag,
const Uint16  value,
const unsigned long  pos = 0,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: US, xs (US or SS)

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element
posindex of the value to be set (0..vm). A value can be appended to the end of or inserted within the existing value field.
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertUint16Array ( const DcmTag tag,
const Uint16 *  value,
const unsigned long  count,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: AT, OW, US, ox (polymorph OB/OW or pixel data), xs (US or SS)

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element (might be NULL)
countnumber of values (not bytes!) to be copied from 'value'
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertUint32 ( const DcmTag tag,
const Uint32  value,
const unsigned long  pos = 0,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: UL

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element
posindex of the value to be set (0..vm). A value can be appended to the end of or inserted within the existing value field.
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
OFCondition DcmItem::putAndInsertUint8Array ( const DcmTag tag,
const Uint8 *  value,
const unsigned long  count,
const OFBool  replaceOld = OFTrue 
)

create a new element, put specified value to it and insert the element into the dataset/item.

Applicable to the following VRs: OB, ox (polymorph OB/OW or pixel data)

Parameters
tagDICOM tag specifying the attribute to be created
valuevalue to be set for the new element (might be NULL)
countnumber of values (= bytes in this case) to be copied from 'value'
replaceOldflag indicating whether to replace an existing element or not
Returns
EC_Normal upon success, an error code otherwise.
virtual OFCondition DcmItem::read ( DcmInputStream inStream,
const E_TransferSyntax  ixfer,
const E_GrpLenEncoding  glenc = EGL_noChange,
const Uint32  maxReadLength = DCM_MaxReadLength 
)
virtual

This function reads the information of all attributes which are captured in the input stream and captures this information in elementList.

Each attribute is represented as an element in this list. If not all information for an attribute could be read from the stream, the function returns EC_StreamNotifyClient.

Parameters
inStreamThe stream which contains the information.
ixferThe transfer syntax which was used to encode the information in inStream.
glencEncoding type for group length; specifies what will be done with group length tags.
maxReadLengthMaximum read length for reading an attribute value.
Returns
status, EC_Normal if successful, an error code otherwise

Implements DcmObject.

Reimplemented in DcmDirectoryRecord, DcmDataset, and DcmMetaInfo.

OFCondition DcmItem::readSubElement ( DcmInputStream inStream,
DcmTag newTag,
const Uint32  newLength,
const E_TransferSyntax  xfer,
const E_GrpLenEncoding  glenc,
const Uint32  maxReadLength = DCM_MaxReadLength 
)
protected

This function creates a new DcmElement object on the basis of the newTag and newLength information which was passed, inserts this new element into elementList, reads the actual data value which belongs to this element (attribute) from the inStream and also assigns this information to the object which was created at the beginning.

Parameters
inStreamThe stream which contains the information.
newTagThe tag of the element of which the information is being read.
newLengthThe length of the information which is being read.
xferThe transfer syntax which was used to encode the information in inStream.
glencEncoding type for group length. Specifies what will be done with group length tags.
maxReadLengthMaximum read length for reading the attribute value.
Returns
status, EC_Normal if successful, an error code otherwise
OFCondition DcmItem::readTagAndLength ( DcmInputStream inStream,
const E_TransferSyntax  xfer,
DcmTag tag,
Uint32 &  length,
Uint32 &  bytesRead 
)
protected

This function reads tag and length information from inStream and returns this information to the caller.

When reading information, the transfer syntax which was passed is accounted for. If the transfer syntax shows an explicit value representation, the data type of this object is also read from the stream. In general, this function follows the rules which are specified in the DICOM standard (see DICOM standard (year 2000) part 5, section 7) (or the corresponding section in a later version of the standard) concerning the encoding of a dataset.

Parameters
inStreamThe stream which contains the information.
xferThe transfer syntax which was used to encode the information in inStream.
tagContains in the end the tag that was read.
lengthContains in the end the length value that was read.
bytesReadContains in the end the amount of bytes which were read from inStream.
Returns
status, EC_Normal if successful, an error code otherwise
virtual DcmElement* DcmItem::remove ( const unsigned long  num)
virtual

remove element from list.

If found, the element is not deleted but returned to the caller who is responsible for further management of the DcmElement object.

Parameters
numindex number of element, must be < card()
Returns
pointer to DcmElement if found, NULL otherwise
virtual DcmElement* DcmItem::remove ( DcmObject elem)
virtual

remove element from list.

If found, the element is not deleted but returned to the caller who is responsible for further management of the DcmElement object.

Parameters
elempointer to element (as type DcmObject *) to be removed from list
Returns
pointer to element (as type DcmElement *) if found, NULL otherwise
virtual DcmElement* DcmItem::remove ( const DcmTagKey tag)
virtual

remove element from list.

If found, the element is not deleted but returned to the caller who is responsible for further management of the DcmElement object.

Parameters
tagattribute tag of element to be removed
Returns
pointer to DcmElement if found, NULL otherwise
virtual OFCondition DcmItem::search ( const DcmTagKey xtag,
DcmStack resultStack,
E_SearchMode  mode = ESM_fromHere,
OFBool  searchIntoSub = OFTrue 
)
virtual

a complex, stack-based, hierarchical search method.

It allows for a search for a DICOM object with a given attribute within a given container, hierarchically, from a starting position identified through a cursor stack.

Parameters
xtagthe DICOM attribute tag we are searching for
resultStackDepending on the search mode (see below), this parameter either serves as an input and output parameter, or as an output parameter only (the latter being the default). When used as an input parameter, the cursor stack defines the start position for the search within a hierarchical DICOM dataset. Upon successful return, the stack contains the position of the element found, in the form of a pointer to each dataset, sequence, item and element from the main dataset down to the found element.
modesearch mode, controls how the search stack is handled. In the default mode, ESM_fromHere, the stack is ignored on input, and the search starts in the object for which this method is called. In the other modes, the stack is used both as an input and an output parameter and defines the starting point for the search.
searchIntoSubif true, the search will be performed hierarchically descending into the sequences and items of the dataset. If false, only the current container (sequence or item) will be traversed.
Returns
EC_Normal if found, EC_TagNotFound if not found, an error code is something went wrong.

Reimplemented from DcmObject.

Reimplemented in DcmDirectoryRecord.

OFCondition DcmItem::searchSubFromHere ( const DcmTagKey tag,
DcmStack resultStack,
OFBool  searchIntoSub 
)
private

helper function for search().

May only be called if elementList is non-empty. Performs hierarchical search for given tag and pushes pointer of sub-element on result stack if found

Parameters
tagtag key to be searched
resultStackupon successful return, pointer to element pushed onto this stack
searchIntoSubflag indicating whether recursive search is desired
Returns
EC_Normal if tag found and stack modified, EC_TagNotFound if tag not found and stack unmodified
OFBool DcmItem::tagExists ( const DcmTagKey key,
OFBool  searchIntoSub = OFFalse 
)

check if an element with the given attribute tag exists in the dataset

Parameters
keytag key to be searched
searchIntoSubif true, do hierarchical search within sequences, if false only search through this dataset
Returns
true if tag found, false otherwise

Referenced by I2DOutputPlug::checkAndInventType1Attrib(), and I2DOutputPlug::checkAndInventType2Attrib().

OFBool DcmItem::tagExistsWithValue ( const DcmTagKey key,
OFBool  searchIntoSub = OFFalse 
)

check if an element with the given attribute tag exists in the dataset and has a non-empty value (i.e., length > 0)

Parameters
keytag key to be searched
searchIntoSubif true, do hierarchical search within sequences, if false only search through this dataset
Returns
true if tag found and element non-empty, false otherwise
virtual void DcmItem::transferEnd ( )
virtual

finalize the transfer state of this object.

This method must be called when reading/writing this object from/to a stream has been completed.

Reimplemented from DcmObject.

Reimplemented in DcmMetaInfo.

virtual void DcmItem::transferInit ( )
virtual

initialize the transfer state of this object.

This method must be called before this object is written to a stream or read (parsed) from a stream.

Reimplemented from DcmObject.

Reimplemented in DcmMetaInfo.

virtual OFCondition DcmItem::verify ( const OFBool  autocorrect = OFFalse)
virtual

check the currently stored element value

Parameters
autocorrectcorrect value length if OFTrue
Returns
status, EC_Normal if value length is correct, an error code otherwise

Implements DcmObject.

Reimplemented in DcmDirectoryRecord.

virtual OFCondition DcmItem::write ( DcmOutputStream outStream,
const E_TransferSyntax  oxfer,
const E_EncodingType  enctype,
DcmWriteCache wcache 
)
virtual

write object to a stream

Parameters
outStreamDICOM output stream
oxferoutput transfer syntax
enctypeencoding types (undefined or explicit length)
wcachepointer to write cache object, may be NULL
Returns
status, EC_Normal if successful, an error code otherwise

Implements DcmObject.

Reimplemented in DcmDataset, and DcmMetaInfo.

virtual OFCondition DcmItem::writeSignatureFormat ( DcmOutputStream outStream,
const E_TransferSyntax  oxfer,
const E_EncodingType  enctype,
DcmWriteCache wcache 
)
virtual

special write method for creation of digital signatures

Parameters
outStreamDICOM output stream
oxferoutput transfer syntax
enctypeencoding types (undefined or explicit length)
wcachepointer to write cache object, may be NULL
Returns
status, EC_Normal if successful, an error code otherwise

Implements DcmObject.

Reimplemented in DcmDataset.

virtual OFCondition DcmItem::writeXML ( STD_NAMESPACE ostream &  out,
const size_t  flags = 0 
)
virtual

write object in XML format

Parameters
outoutput stream to which the XML document is written
flagsoptional flag used to customize the output (see DCMTypes::XF_xxx)
Returns
status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmObject.

Reimplemented in DcmDirectoryRecord, DcmDataset, and DcmMetaInfo.

Member Data Documentation

offile_off_t DcmItem::fStartPosition
protected

used during reading.

Contains the position in the stream where the item started (needed for calculating the remaining number of bytes available for a fixed-length item).

Definition at line 1020 of file dcitem.h.

OFBool DcmItem::lastElementComplete
protected

flag used during suspended I/O.

Indicates whether the last element was completely or only partially read/written during the last call to read/write.

Definition at line 1014 of file dcitem.h.


The documentation for this class was generated from the following file:


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