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java.lang.Objectorg.apache.commons.discovery.tools.ClassUtils
public class ClassUtils
Various utilities to interact with Class
types.
Constructor Summary | |
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ClassUtils()
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Method Summary | ||
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static java.lang.reflect.Method |
findPublicStaticMethod(java.lang.Class<?> clazz,
java.lang.Class<?> returnType,
java.lang.String methodName,
java.lang.Class<?>[] paramTypes)
Looks for public static returnType methodName(paramTypes) . |
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static java.lang.String |
getPackageName(java.lang.Class<?> clazz)
Get package name. |
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static
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newInstance(java.lang.Class<T> impl,
java.lang.Class<?>[] paramClasses,
java.lang.Object[] params)
Creates a new instance of the input class using the following policy: if paramClasses or params is null,
the default constructor will be used;
the public constructor with paramClasses arguments type,
with params as arguments value, will be used.
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static void |
setLog(org.apache.commons.logging.Log _log)
Deprecated. This method is not thread-safe |
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static void |
verifyAncestory(java.lang.Class<?> spi,
java.lang.Class<?> impl)
Throws exception if impl does not
implement or extend the SPI. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ClassUtils()
Method Detail |
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@Deprecated public static void setLog(org.apache.commons.logging.Log _log)
Log
for this class.
_log
- This class Log
public static java.lang.String getPackageName(java.lang.Class<?> clazz)
clazz
- The class from which the package has to be extracted
public static java.lang.reflect.Method findPublicStaticMethod(java.lang.Class<?> clazz, java.lang.Class<?> returnType, java.lang.String methodName, java.lang.Class<?>[] paramTypes)
public static returnType methodName(paramTypes)
.
clazz
- The class where looking for the methodreturnType
- The method return typemethodName
- The method nameparamTypes
- The method arguments types
public static returnType methodName(paramTypes)
,
if found to be directly implemented by clazz.public static <T> T newInstance(java.lang.Class<T> impl, java.lang.Class<?>[] paramClasses, java.lang.Object[] params) throws DiscoveryException, java.lang.InstantiationException, java.lang.IllegalAccessException, java.lang.NoSuchMethodException, java.lang.reflect.InvocationTargetException
paramClasses
or params
is null,
the default constructor will be used;paramClasses
arguments type,
with params
as arguments value, will be used.
T
- The class type has to be instantiatedimpl
- The class has to be instantiatedparamClasses
- The constructor arguments types (can be null
)params
- The constructor arguments values (can be null
)
DiscoveryException
- if the class implementing
the SPI cannot be found, cannot be loaded and
instantiated, or if the resulting class does not implement
(or extend) the SPI
java.lang.InstantiationException
- see Class.newInstance()
java.lang.IllegalAccessException
- see Class.newInstance()
java.lang.NoSuchMethodException
- see Class.newInstance()
java.lang.reflect.InvocationTargetException
- see Class.newInstance()
public static void verifyAncestory(java.lang.Class<?> spi, java.lang.Class<?> impl) throws DiscoveryException
impl
does not
implement or extend the SPI.
spi
- The SPI typeimpl
- The class has to be verified is a SPI implementation/extension
DiscoveryException
- if the input implementation class is not an SPI implementation
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