org.codehaus.aspectwerkz.annotation.instrumentation
Interface AttributeExtractor

All Known Implementing Classes:

JavassistAttributeExtractor

public interface AttributeExtractor

Methods that should be implemented in order to extract attributes associate with a class.

An implementation this class needs to be provided for each bytecode manipulation library or other meta-data storage mechanism that is supported.

Author:

Jonas Bonér

Field Summary

static Object[]

EMPTY_OBJECT_ARRAY

Method Summary

Object[]	getClassAttributes() Retreives attributes associated with the class.
Object[]	getConstructorAttributes(String[] constructorParamTypes) Return all the attributes associated with a constructor that have a particular method signature.
Object[]	getFieldAttributes(String fieldName) Retreives custom attributes applied to a specific field of the class.
Object[]	getMethodAttributes(String methodName, String[] methodParamTypes) Retreives custom attributes applied to a specific method of the class.

Field Detail

EMPTY_OBJECT_ARRAY

public static final Object[] EMPTY_OBJECT_ARRAY

Method Detail

getClassAttributes

public Object[] getClassAttributes()

Retreives attributes associated with the class.

Returns:

An array of attributes that satisfy the instanceof comparison with the filter class. Null if there are no attributes associated with the class.

getMethodAttributes

public Object[] getMethodAttributes(String methodName,
                                    String[] methodParamTypes)

Retreives custom attributes applied to a specific method of the class.

Parameters:

methodName - The name of the method.

methodParamTypes - The signature of the method.

Returns:

An array of custom attributes. Null if there are no attributes.

getConstructorAttributes

public Object[] getConstructorAttributes(String[] constructorParamTypes)

Return all the attributes associated with a constructor that have a particular method signature.

Parameters:

constructorParamTypes - An array of parameter types as given by the reflection api.

Returns:

the constructor attributes.

getFieldAttributes

public Object[] getFieldAttributes(String fieldName)

Retreives custom attributes applied to a specific field of the class.

Parameters:

fieldName - the name of a class field.

Returns:

An array of custom attributes. Null if there are no attributes.