/**************************************************************************************
* Copyright (c) Jonas Bon�r, Alexandre Vasseur. All rights reserved. *
* http://aspectwerkz.codehaus.org *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the LGPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package org.codehaus.aspectwerkz.reflect.impl.asm;
import org.codehaus.aspectwerkz.reflect.ClassInfo;
import org.codehaus.aspectwerkz.reflect.ConstructorInfo;
import org.codehaus.aspectwerkz.reflect.MethodInfo;
import org.codehaus.aspectwerkz.transform.AsmHelper;
import org.codehaus.aspectwerkz.annotation.instrumentation.asm.AsmAnnotationHelper;
import org.codehaus.aspectwerkz.ContextClassLoader;
import org.objectweb.asm.Type;
import org.objectweb.asm.ClassReader;
import java.util.List;
import java.util.ArrayList;
import java.io.IOException;
/**
* ASM implementation of the ConstructorInfo interface.
*
* @author <a href="mailto:jboner@codehaus.org">Jonas Bon�r </a>
*/
public class AsmConstructorInfo extends AsmMemberInfo implements ConstructorInfo {
/**
* A list with the parameter type names.
*/
private String[] m_parameterTypeNames = null;
/**
* A list with the exception type names.
*/
private String[] m_exceptionTypeNames = null;
/**
* A list with the parameter types.
*/
private ClassInfo[] m_parameterTypes = null;
/**
* A list with the exception types.
*/
private ClassInfo[] m_exceptionTypes = null;
/**
* Creates a new method meta data instance.
*
* @param method
* @param declaringType
* @param loader
*/
AsmConstructorInfo(final MethodStruct method, final String declaringType, final ClassLoader loader) {
super(method, declaringType, loader);
Type[] argTypes = Type.getArgumentTypes(method.desc);
m_parameterTypeNames = new String[argTypes.length];
for (int i = 0; i < argTypes.length; i++) {
m_parameterTypeNames[i] = argTypes[i].getClassName();
}
// FIXME: how to do exceptions?
m_exceptionTypeNames = new String[] {};
}
/**
* Returns the constructor info for the constructor specified.
*
* @param constructorDesc
* @param bytecode
* @param loader
* @return the constructor info
*/
public static MethodInfo getConstructorInfo(
final String constructorDesc,
final byte[] bytecode,
final ClassLoader loader) {
String className = AsmClassInfo.retrieveClassNameFromBytecode(bytecode);
AsmClassInfoRepository repository = AsmClassInfoRepository.getRepository(loader);
ClassInfo classInfo = repository.getClassInfo(className);
if (classInfo == null) {
classInfo = AsmClassInfo.getClassInfo(bytecode, loader);
}
return classInfo.getMethod(AsmHelper.calculateConstructorHash(constructorDesc));
}
/**
* Returns the parameter types.
*
* @return the parameter types
*/
public ClassInfo[] getParameterTypes() {
if (m_parameterTypes == null) {
m_parameterTypes = new ClassInfo[m_parameterTypeNames.length];
for (int i = 0; i < m_parameterTypeNames.length; i++) {
m_parameterTypes[i] = AsmClassInfo.getClassInfo(
m_parameterTypeNames[i],
(ClassLoader) m_loaderRef.get()
);
}
}
return m_parameterTypes;
}
/**
* Returns the exception types.
*
* @return the exception types
*/
public ClassInfo[] getExceptionTypes() {
if (m_exceptionTypes == null) {
m_exceptionTypes = new ClassInfo[m_exceptionTypeNames.length];
for (int i = 0; i < m_exceptionTypeNames.length; i++) {
m_exceptionTypes[i] = AsmClassInfo.getClassInfo(
m_exceptionTypeNames[i],
(ClassLoader) m_loaderRef.get()
);
}
}
return m_exceptionTypes;
}
/**
* Returns the annotations.
*
* @return the annotations
*/
public List getAnnotations() {
if (m_annotations == null) {
try {
ClassReader cr = new ClassReader(
ContextClassLoader.getResourceAsStream(
m_declaringTypeName.replace('.','/')+".class",
(ClassLoader)m_loaderRef.get()
)
);
List annotations = new ArrayList();
cr.accept(
new AsmAnnotationHelper.ConstructorAnnotationExtractor(annotations, m_member.desc, (ClassLoader)m_loaderRef.get()),
AsmAnnotationHelper.ANNOTATIONS_ATTRIBUTES,
true
);
m_annotations = annotations;
} catch (IOException e) {
// unlikely to occur since ClassInfo relies on getResourceAsStream
System.err.println("WARN - could not load " + m_declaringTypeName + " as a resource to retrieve annotations");
m_annotations = AsmClassInfo.EMPTY_LIST;
}
}
return m_annotations;
}
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof ConstructorInfo)) {
return false;
}
ConstructorInfo constructorInfo = (ConstructorInfo) o;
if (!m_declaringTypeName.equals(constructorInfo.getDeclaringType().getName())) {
return false;
}
if (!m_member.name.equals(constructorInfo.getName())) {
return false;
}
ClassInfo[] parameterTypes = constructorInfo.getParameterTypes();
if (m_parameterTypeNames.length != parameterTypes.length) {//check on names length for lazyness optim
return false;
}
for (int i = 0; i < m_parameterTypeNames.length; i++) {
if (!m_parameterTypeNames[i].equals(parameterTypes[i].getName())) {
return false;
}
}
return true;
}
public int hashCode() {
int result = 29;
result = (29 * result) + m_declaringTypeName.hashCode();
result = (29 * result) + m_member.name.hashCode();
for (int i = 0; i < m_parameterTypeNames.length; i++) {
result = (29 * result) + m_parameterTypeNames[i].hashCode();
}
return result;
}
public String toString() {
StringBuffer sb = new StringBuffer(m_declaringTypeName);
sb.append('.').append(m_member.name);
sb.append(m_member.desc);
return sb.toString();
}
}