/**************************************************************************************
* 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 gnu.trove.TIntArrayList;
import gnu.trove.TIntObjectHashMap;
import org.codehaus.aspectwerkz.exception.WrappedRuntimeException;
import org.codehaus.aspectwerkz.reflect.ClassInfo;
import org.codehaus.aspectwerkz.reflect.ConstructorInfo;
import org.codehaus.aspectwerkz.reflect.FieldInfo;
import org.codehaus.aspectwerkz.reflect.MethodInfo;
import org.codehaus.aspectwerkz.reflect.StaticInitializationInfo;
import org.codehaus.aspectwerkz.reflect.StaticInitializationInfoImpl;
import org.codehaus.aspectwerkz.reflect.impl.java.JavaClassInfo;
import org.codehaus.aspectwerkz.transform.TransformationConstants;
import org.codehaus.aspectwerkz.transform.inlining.AsmHelper;
import org.codehaus.aspectwerkz.transform.inlining.AsmNullAdapter;
import org.codehaus.aspectwerkz.util.ContextClassLoader;
import org.codehaus.backport175.reader.bytecode.AnnotationElement;
import org.codehaus.backport175.reader.bytecode.AnnotationReader;
import org.objectweb.asm.*;
import java.io.IOException;
import java.io.InputStream;
import java.lang.ref.WeakReference;
import java.lang.reflect.Array;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
/**
* Implementation of the ClassInfo interface utilizing the ASM bytecode library for the info retriaval.
* <p/>
* Annotations are lazily gathered, unless required to visit them at the same time as we visit methods and fields.
* <p/>
* This implementation guarantees that the method, fields and constructors can be retrieved in the same order as they were in the bytecode
* (it can depends of the compiler and might not be the order of the source code - f.e. IBM compiler)
*
* @author <a href="mailto:jboner@codehaus.org">Jonas Bon�r </a>
* @author <a href="mailto:alex@gnilux.com">Alexandre Vasseur </a>
*/
public class AsmClassInfo implements ClassInfo {
protected final static String[] EMPTY_STRING_ARRAY = new String[0];
protected final static List EMPTY_LIST = new ArrayList();
/**
* The class loader wrapped in a weak ref.
*/
private final WeakReference m_loaderRef;
/**
* The name of the class (with dots and not slashes)
*/
private String m_name;
/**
* The signature of the class.
*/
private String m_signature;
/**
* The modifiers.
*/
private int m_modifiers;
/**
* Is the class an interface.
*/
private boolean m_isInterface = false;
/**
* Is the class a primitive type.
*/
private boolean m_isPrimitive = false;
/**
* Is the class of type array.
*/
private boolean m_isArray = false;
/**
* Flag for the static initializer method.
*/
private boolean m_hasStaticInitializer = false;
/**
* Lazy instance that represents the static initializer if present, else null
*/
private StaticInitializationInfo m_staticInitializer = null;
/**
* A list with the <code>ConstructorInfo</code> instances.
* When visiting the bytecode, we keep track of the order of the visit.
* The first time the getConstructors() gets called, we build an array and then reuse it directly.
*/
private final TIntObjectHashMap m_constructors = new TIntObjectHashMap();
private TIntArrayList m_sortedConstructorHashes = new TIntArrayList();
private ConstructorInfo[] m_constructorsLazy = null;
/**
* A list with the <code>MethodInfo</code> instances.
* When visiting the bytecode, we keep track of the order of the visit.
* The first time the getMethods() gets called, we build an array and then reuse it directly.
*/
private final TIntObjectHashMap m_methods = new TIntObjectHashMap();
private TIntArrayList m_sortedMethodHashes = new TIntArrayList();
private MethodInfo[] m_methodsLazy = null;
/**
* A list with the <code>FieldInfo</code> instances.
* When visiting the bytecode, we keep track of the order of the visit.
* The first time the getFields() gets called, we build an array and then reuse it directly.
*/
private final TIntObjectHashMap m_fields = new TIntObjectHashMap();
private TIntArrayList m_sortedFieldHashes = new TIntArrayList();
private FieldInfo[] m_fieldsLazy = null;
/**
* A list with the interfaces class names.
*/
private String[] m_interfaceClassNames = null;
/**
* A list with the interfaces.
*/
private ClassInfo[] m_interfaces = null;
/**
* The super class name.
*/
private String m_superClassName = null;
/**
* The super class.
*/
private ClassInfo m_superClass = null;
/**
* The annotation reader.
* Lazily instantiated from backport.
*/
private AnnotationReader m_annotationReader = null;
/**
* The component type name if array type. Can be an array itself.
*/
private String m_componentTypeName = null;
/**
* The component type if array type. Can be an array itself.
*/
private ClassInfo m_componentType = null;
/**
* The class info repository.
*/
private final AsmClassInfoRepository m_classInfoRepository;
/**
* Creates a new ClassInfo instance.
*
* @param bytecode
* @param loader
*/
AsmClassInfo(final byte[] bytecode, final ClassLoader loader) {
if (bytecode == null) {
throw new IllegalArgumentException("bytecode can not be null");
}
m_loaderRef = new WeakReference(loader);
m_classInfoRepository = AsmClassInfoRepository.getRepository(loader);
try {
ClassReader cr = new ClassReader(bytecode);
ClassInfoClassAdapter visitor = new ClassInfoClassAdapter();
cr.accept(visitor, false);
} catch (Throwable t) {
t.printStackTrace();
}
m_classInfoRepository.addClassInfo(this);
}
/**
* Creates a new ClassInfo instance.
*
* @param resourceStream
* @param loader
*/
AsmClassInfo(final InputStream resourceStream, final ClassLoader loader) {
if (resourceStream == null) {
throw new IllegalArgumentException("resource stream can not be null");
}
m_loaderRef = new WeakReference(loader);
m_classInfoRepository = AsmClassInfoRepository.getRepository(loader);
try {
ClassReader cr = new ClassReader(resourceStream);
ClassInfoClassAdapter visitor = new ClassInfoClassAdapter();
cr.accept(visitor, false);
} catch (Throwable t) {
t.printStackTrace();
}
m_classInfoRepository.addClassInfo(this);
}
/**
* Create a ClassInfo based on a component type and a given dimension Due to java.lang.reflect. behavior, the
* ClassInfo is almost empty. It is not an interface, only subclass of java.lang.Object, no methods, fields, or
* constructor, no annotation.
*
* @param className
* @param loader
* @param componentInfo
*/
AsmClassInfo(final String className,
final ClassLoader loader,
final ClassInfo componentInfo) {
m_loaderRef = new WeakReference(loader);
m_name = className.replace('/', '.');
m_classInfoRepository = AsmClassInfoRepository.getRepository(loader);
m_isArray = true;
m_componentType = componentInfo;
m_componentTypeName = componentInfo.getName();
m_modifiers = componentInfo.getModifiers() | Modifier.ABSTRACT | Modifier.FINAL;
m_isInterface = false;//as in java.reflect
m_superClass = JavaClassInfo.getClassInfo(Object.class);
m_superClassName = m_superClass.getName();
m_interfaceClassNames = new String[0];
m_interfaces = new ClassInfo[0];
m_signature = AsmHelper.getClassDescriptor(this);
m_classInfoRepository.addClassInfo(this);
}
/**
* Returns a completely new class info for a specific class. Does not cache.
*
* @param bytecode
* @param loader
* @return the class info
*/
public static ClassInfo newClassInfo(final byte[] bytecode, final ClassLoader loader) {
final String className = AsmClassInfo.retrieveClassNameFromBytecode(bytecode);
AsmClassInfoRepository repository = AsmClassInfoRepository.getRepository(loader);
repository.removeClassInfo(className);
return new AsmClassInfo(bytecode, loader);
}
/**
* Returns the class info for a specific class.
*
* @param className
* @param loader
* @return the class info
*/
public static ClassInfo getClassInfo(final String className, final ClassLoader loader) {
final String javaClassName = getJavaClassName(className);
AsmClassInfoRepository repository = AsmClassInfoRepository.getRepository(loader);
ClassInfo classInfo = repository.getClassInfo(javaClassName);
if (classInfo == null) {
classInfo = createClassInfoFromStream(javaClassName, loader);
}
return classInfo;
}
/**
* Returns the class info for a specific class.
*
* @param bytecode
* @param loader
* @return the class info
*/
public static ClassInfo getClassInfo(final byte[] bytecode, final ClassLoader loader) {
final String className = AsmClassInfo.retrieveClassNameFromBytecode(bytecode);
AsmClassInfoRepository repository = AsmClassInfoRepository.getRepository(loader);
ClassInfo classInfo = repository.getClassInfo(className);
if (classInfo == null) {
classInfo = new AsmClassInfo(bytecode, loader);
}
return classInfo;
}
/**
* Returns the class info for a specific class.
*
* @param className
* @param bytecode
* @param loader
* @return the class info
*/
public static ClassInfo getClassInfo(final String className, final byte[] bytecode, final ClassLoader loader) {
AsmClassInfoRepository repository = AsmClassInfoRepository.getRepository(loader);
ClassInfo classInfo = repository.getClassInfo(className.replace('.', '/'));
if (classInfo == null) {
classInfo = new AsmClassInfo(bytecode, loader);
}
return classInfo;
}
/**
* Returns the class info for a specific class.
*
* @param stream
* @param loader
* @return the class info
*/
public static ClassInfo getClassInfo(final InputStream stream, final ClassLoader loader) {
try {
ClassReader cr = new ClassReader(stream);
// keep a copy of the bytecode, since me way want to "reuse the stream"
byte[] bytes = cr.b;
ClassNameRetrievalClassAdapter visitor = new ClassNameRetrievalClassAdapter();
cr.accept(visitor, true);
final String className = visitor.getClassName();
AsmClassInfoRepository repository = AsmClassInfoRepository.getRepository(loader);
ClassInfo classInfo = repository.getClassInfo(className);
if (classInfo == null) {
classInfo = new AsmClassInfo(bytes, loader);
}
return classInfo;
} catch (IOException e) {
throw new WrappedRuntimeException(e);
}
}
/**
* Marks the class as dirty (since it has been modified and needs to be rebuild).
*
* @param className
*/
public static void markDirty(final String className, final ClassLoader loader) {
AsmClassInfoRepository.getRepository(loader).removeClassInfo(className);
}
/**
* Retrieves the class name from the bytecode of a class.
*
* @param bytecode
* @return the class name
*/
public static String retrieveClassNameFromBytecode(final byte[] bytecode) {
ClassReader cr = new ClassReader(bytecode);
ClassNameRetrievalClassAdapter visitor = new ClassNameRetrievalClassAdapter();
cr.accept(visitor, true);
return visitor.getClassName();
}
/**
* Checks if the class is a of a primitive type, if so create and return the class for the type else return null.
*
* @param className
* @return the class for the primitive type or null
*/
public static Class getPrimitiveClass(final String className) {
if (className.equals("void")) {
return void.class;
} else if (className.equals("long")) {
return long.class;
} else if (className.equals("int")) {
return int.class;
} else if (className.equals("short")) {
return short.class;
} else if (className.equals("double")) {
return double.class;
} else if (className.equals("float")) {
return float.class;
} else if (className.equals("byte")) {
return byte.class;
} else if (className.equals("boolean")) {
return boolean.class;
} else if (className.equals("char")) {
return char.class;
} else {
return null;
}
}
/**
* Returns the annotations.
*
* @return the annotations
*/
public AnnotationElement.Annotation[] getAnnotations() {
return getAnnotationReader().getAnnotationElements();
}
/**
* Returns the name of the class.
*
* @return the name of the class
*/
public String getName() {
return m_name;
}
/**
* Returns the signature for the class.
*
* @return the signature for the class
*/
public String getSignature() {
return m_signature;
}
/**
* Returns the class modifiers.
*
* @return the class modifiers
*/
public int getModifiers() {
return m_modifiers;
}
/**
* Returns the class loader that loaded this class.
*
* @return the class loader
*/
public ClassLoader getClassLoader() {
return (ClassLoader) m_loaderRef.get();
}
/**
* Checks if the class has a static initalizer.
*
* @return
*/
public boolean hasStaticInitializer() {
return m_hasStaticInitializer;
}
/**
* Return the static initializer info or null if not present
*
* @see org.codehaus.aspectwerkz.reflect.ClassInfo#staticInitializer()
*/
public StaticInitializationInfo staticInitializer() {
if (hasStaticInitializer() && m_staticInitializer == null) {
m_staticInitializer = new StaticInitializationInfoImpl(this);
}
return m_staticInitializer;
}
/**
* Returns a constructor info by its hash.
*
* @param hash
* @return
*/
public ConstructorInfo getConstructor(final int hash) {
ConstructorInfo constructor = (ConstructorInfo) m_constructors.get(hash);
if (constructor == null && getSuperclass() != null) {
constructor = getSuperclass().getConstructor(hash);
}
return constructor;
}
/**
* Returns a list with all the constructors info.
*
* @return the constructors info
*/
public ConstructorInfo[] getConstructors() {
if (m_constructorsLazy == null) {
ConstructorInfo[] constructorInfos = new ConstructorInfo[m_sortedConstructorHashes.size()];
for (int i = 0; i < m_sortedConstructorHashes.size(); i++) {
constructorInfos[i] = (ConstructorInfo) m_constructors.get(m_sortedConstructorHashes.get(i));
}
m_constructorsLazy = constructorInfos;
}
return m_constructorsLazy;
}
/**
* Returns a method info by its hash.
*
* @param hash
* @return
*/
public MethodInfo getMethod(final int hash) {
MethodInfo method = (MethodInfo) m_methods.get(hash);
if (method == null) {
for (int i = 0; i < getInterfaces().length; i++) {
method = getInterfaces()[i].getMethod(hash);
if (method != null) {
break;
}
}
}
if (method == null && getSuperclass() != null) {
method = getSuperclass().getMethod(hash);
}
return method;
}
/**
* Returns a list with all the methods info.
*
* @return the methods info
*/
public MethodInfo[] getMethods() {
if (m_methodsLazy == null) {
MethodInfo[] methodInfos = new MethodInfo[m_sortedMethodHashes.size()];
for (int i = 0; i < m_sortedMethodHashes.size(); i++) {
methodInfos[i] = (MethodInfo) m_methods.get(m_sortedMethodHashes.get(i));
}
m_methodsLazy = methodInfos;
}
return m_methodsLazy;
}
/**
* Returns a field info by its hash.
*
* @param hash
* @return
*/
public FieldInfo getField(final int hash) {
FieldInfo field = (FieldInfo) m_fields.get(hash);
if (field == null && getSuperclass() != null) {
field = getSuperclass().getField(hash);
}
if (field == null) {
// Trying to find constants in Interfaces
ClassInfo[] interfaces = getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
ClassInfo ifc = interfaces[i];
field = ifc.getField(hash);
if (field != null)
break;
}
}
return field;
}
/**
* Returns a list with all the field info.
*
* @return the field info
*/
public FieldInfo[] getFields() {
if (m_fieldsLazy == null) {
FieldInfo[] fieldInfos = new FieldInfo[m_sortedFieldHashes.size()];
for (int i = 0; i < m_sortedFieldHashes.size(); i++) {
fieldInfos[i] = (FieldInfo) m_fields.get(m_sortedFieldHashes.get(i));
}
m_fieldsLazy = fieldInfos;
}
return m_fieldsLazy;
}
/**
* Returns the interfaces.
*
* @return the interfaces
*/
public ClassInfo[] getInterfaces() {
if (m_interfaces == null) {
m_interfaces = new ClassInfo[m_interfaceClassNames.length];
for (int i = 0; i < m_interfaceClassNames.length; i++) {
m_interfaces[i] = AsmClassInfo.getClassInfo(m_interfaceClassNames[i], (ClassLoader) m_loaderRef.get());
}
}
return m_interfaces;
}
/**
* Returns the super class.
*
* @return the super class
*/
public ClassInfo getSuperclass() {
if (m_superClass == null && m_superClassName != null) {
m_superClass = AsmClassInfo.getClassInfo(m_superClassName, (ClassLoader) m_loaderRef.get());
}
return m_superClass;
}
/**
* Returns the component type if array type else null.
*
* @return the component type
*/
public ClassInfo getComponentType() {
if (isArray() && (m_componentTypeName == null)) {
m_componentType = AsmClassInfo.getClassInfo(m_componentTypeName, (ClassLoader) m_loaderRef.get());
}
return m_componentType;
}
/**
* Is the class an interface.
*
* @return
*/
public boolean isInterface() {
return m_isInterface;
}
/**
* Is the class a primitive type.
*
* @return
*/
public boolean isPrimitive() {
return m_isPrimitive;
}
/**
* Is the class an array type.
*
* @return
*/
public boolean isArray() {
return m_isArray;
}
/**
* @see java.lang.Object#equals(java.lang.Object)
*/
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof ClassInfo)) {
return false;
}
ClassInfo classInfo = (ClassInfo) o;
return m_name.equals(classInfo.getName());
}
/**
* @see java.lang.Object#hashCode()
*/
public int hashCode() {
return m_name.hashCode();
}
public String toString() {
return m_name;
}
/**
* Create a ClassInfo based on a component type which can be himself an array
*
* @param className
* @param loader
* @param componentClassInfo
* @return
*/
public static ClassInfo getArrayClassInfo(final String className,
final ClassLoader loader,
final ClassInfo componentClassInfo) {
return new AsmClassInfo(className, loader, componentClassInfo);
}
/**
* Creates a ClassInfo based on the stream retrieved from the class loader through
* <code>getResourceAsStream</code>.
*
* @param name java name as in source code
* @param loader
*/
private static ClassInfo createClassInfoFromStream(final String name,
final ClassLoader loader) {
final String className = name.replace('.', '/');
// to handle primitive type we need to know the array dimension
if (name.indexOf('/') < 0) {
// it might be one
// gets its non array component type and the dimension
int dimension = 0;
for (int i = className.indexOf('['); i > 0; i = className.indexOf('[', i + 1)) {
dimension++;
}
String unidimComponentName = className;
if (dimension > 0) {
int unidimComponentTypeIndex = className.indexOf('[');
unidimComponentName = className.substring(0, unidimComponentTypeIndex);
}
Class primitiveClass = AsmClassInfo.getPrimitiveClass(unidimComponentName);
if (primitiveClass != null && primitiveClass.isPrimitive()) {
if (dimension == 0) {
return JavaClassInfo.getClassInfo(primitiveClass);
} else {
Class arrayClass = Array.newInstance(primitiveClass, new int[dimension]).getClass();
return JavaClassInfo.getClassInfo(arrayClass);
}
}
}
// for non primitive, we need to chain component type ala java.lang.reflect
// to support multi. dim. arrays
int componentTypeIndex = className.lastIndexOf('[');
String componentName = className;
boolean isArray = false;
if (componentTypeIndex > 0) {
componentName = className.substring(0, componentTypeIndex);
isArray = true;
}
ClassInfo componentInfo = null;
// is component yet another array ie this name is a multi dim array ?
if (componentName.indexOf('[') > 0) {
componentInfo = getClassInfo(componentName, loader);
} else {
InputStream componentClassAsStream = null;
if (loader != null) {
componentClassAsStream = loader.getResourceAsStream(componentName + ".class");
} else {
// boot class loader, fall back to system classloader that will see it anyway
componentClassAsStream = ClassLoader.getSystemClassLoader().getResourceAsStream(
componentName + ".class"
);
}
if (componentClassAsStream == null) {
// might be more than one dimension
if (componentName.indexOf('[') > 0) {
return getClassInfo(componentName, loader);
}
System.out.println(
"AW::WARNING - could not load class ["
+ componentName
+ "] as a resource in loader ["
+ loader
+ "]"
);
componentInfo = new ClassInfo.NullClassInfo();
}
try {
componentInfo = AsmClassInfo.getClassInfo(componentClassAsStream, loader);
} finally {
try {
componentClassAsStream.close();
} catch (Exception e) {
;
}
}
}
if (!isArray) {
return componentInfo;
} else {
return AsmClassInfo.getArrayClassInfo(className, loader, componentInfo);
}
}
// /**
// * Creates a string with the annotation key value pairs.
// *
// * @param annotation
// * @return the string
// */
// private static String createAnnotationKeyValueString(final Annotation annotation) {
// List elementValues = annotation.elementValues;
// StringBuffer annotationValues = new StringBuffer();
// if (elementValues.size() != 0) {
// int i = 0;
// for (Iterator iterator = elementValues.iterator(); iterator.hasNext();) {
// Object[] keyValuePair = (Object[]) iterator.next();
// annotationValues.append((String) keyValuePair[0]);
// annotationValues.append('=');
// annotationValues.append(keyValuePair[1].toString());
// if (i < elementValues.size() - 1) {
// annotationValues.append(',');
// }
// }
// }
// return annotationValues.toString();
// }
/**
* ASM bytecode visitor that retrieves the class name from the bytecode.
*
* @author <a href="mailto:jboner@codehaus.org">Jonas Bon�r </a>
*/
public static class ClassNameRetrievalClassAdapter extends AsmNullAdapter.NullClassAdapter {
private String m_className;
public void visit(final int version,
final int access,
final String name,
final String desc,
final String superName,
final String[] interfaces) {
m_className = name.replace('/', '.');
}
public String getClassName() {
return m_className;
}
}
/**
* ASM bytecode visitor that gathers info about the class.
*
* @author <a href="mailto:jboner@codehaus.org">Jonas Bon�r </a>
*/
private class ClassInfoClassAdapter extends AsmNullAdapter.NullClassAdapter {
public void visit(final int version,
final int access,
final String name,
final String desc,
final String superName,
final String[] interfaces) {
m_name = name.replace('/', '.');
m_modifiers = access;
m_isInterface = Modifier.isInterface(m_modifiers);
// special case for java.lang.Object, which does not extend anything
m_superClassName = superName == null ? null : superName.replace('/', '.');
m_interfaceClassNames = new String[interfaces.length];
for (int i = 0; i < interfaces.length; i++) {
m_interfaceClassNames[i] = interfaces[i].replace('/', '.');
}
// FIXME this algo for array types does most likely NOT WORK (since
// I assume that ASM is handling arrays
// using the internal desriptor format '[L' and the algo is using '[]')
if (m_name.endsWith("[]")) {
m_isArray = true;
int index = m_name.indexOf('[');
m_componentTypeName = m_name.substring(0, index);
} else if (m_name.equals("long")
|| m_name.equals("int")
|| m_name.equals("short")
|| m_name.equals("double")
|| m_name.equals("float")
|| m_name.equals("byte")
|| m_name.equals("boolean")
|| m_name.equals("char")) {
m_isPrimitive = true;
}
}
public FieldVisitor visitField(final int access,
final String name,
final String desc,
final String signature,
final Object value) {
final FieldStruct struct = new FieldStruct();
struct.modifiers = access;
struct.name = name;
struct.desc = desc;
struct.value = value;
AsmFieldInfo fieldInfo = new AsmFieldInfo(struct, m_name, (ClassLoader) m_loaderRef.get());
int hash = AsmHelper.calculateFieldHash(name, desc);
m_fields.put(hash, fieldInfo);
m_sortedFieldHashes.add(hash);
return AsmNullAdapter.NullFieldAdapter.NULL_FIELD_ADAPTER;
}
public MethodVisitor visitMethod(final int access,
final String name,
final String desc,
final String signature,
final String[] exceptions) {
final MethodStruct struct = new MethodStruct();
struct.modifiers = access;
struct.name = name;
struct.desc = desc;
struct.exceptions = exceptions;
int hash = AsmHelper.calculateMethodHash(name, desc);
// the methodInfo that should be updated when we will visit the method parameter names info if needed.
AsmMethodInfo methodInfo = null;
if (name.equals(TransformationConstants.CLINIT_METHOD_NAME)) {
m_hasStaticInitializer = true;
} else {
AsmMemberInfo memberInfo = null;
if (name.equals(TransformationConstants.INIT_METHOD_NAME)) {
memberInfo = new AsmConstructorInfo(struct, m_name, (ClassLoader) m_loaderRef.get());
m_constructors.put(hash, memberInfo);
m_sortedConstructorHashes.add(hash);
} else {
memberInfo = new AsmMethodInfo(struct, m_name, (ClassLoader) m_loaderRef.get());
m_methods.put(hash, memberInfo);
m_sortedMethodHashes.add(hash);
methodInfo = (AsmMethodInfo) memberInfo;
}
}
if (methodInfo != null) {
// visit the method to access the parameter names as required to support Aspect with bindings
// TODO: should we make this optional - similar to m_lazyAttributes ?
Type[] parameterTypes = Type.getArgumentTypes(desc);
if (parameterTypes.length > 0) {
MethodVisitor methodParameterNamesVisitor = new MethodParameterNamesCodeAdapter(
Modifier.isStatic(access),
parameterTypes.length, methodInfo
);
return methodParameterNamesVisitor;
} else {
methodInfo.m_parameterNames = EMPTY_STRING_ARRAY;
}
}
return AsmNullAdapter.NullMethodAdapter.NULL_METHOD_ADAPTER;
}
public void visitEnd() {
m_signature = AsmHelper.getClassDescriptor(AsmClassInfo.this);
}
}
/**
* Extracts method parameter names as they appear in the source code from debug infos
*
* @author <a href="mailto:alex AT gnilux DOT com">Alexandre Vasseur</a>
*/
static class MethodParameterNamesCodeAdapter extends AsmNullAdapter.NullMethodAdapter {
private final boolean m_isStatic;
private final int m_parameterCount;
private AsmMethodInfo m_methodInfo;
private int m_signatureParameterRegisterDepth = 0;
public MethodParameterNamesCodeAdapter(boolean isStatic, int parameterCount, AsmMethodInfo methodInfo) {
m_isStatic = isStatic;
m_parameterCount = parameterCount;
m_methodInfo = methodInfo;
m_methodInfo.m_parameterNames = new String[m_parameterCount];
// compute the max index of the arguments that appear in the method signature
// including "this" on register 0 for non static methods
// a long or double needs 2 registers
if (!m_isStatic) {
m_signatureParameterRegisterDepth++;// index 0 = this
}
m_signatureParameterRegisterDepth += AsmHelper.getRegisterDepth(
Type.getArgumentTypes(m_methodInfo.m_member.desc)
);
}
/**
* Do not assume to visit the local variable with index always increasing since it is a wrong assumption
* [ see f.e. test.args.ArgsAspect.withArray advice ]
*
* @param name
* @param desc
* @param sig
* @param start
* @param end
* @param index the index of the argument on the stack
*/
public void visitLocalVariable(String name, String desc, String sig, Label start, Label end, int index) {
if (index < m_signatureParameterRegisterDepth) {
// this is not a local variable
if (index == 0) {
if (!m_isStatic) {
;//skip this
} else {
m_methodInfo.pushParameterNameFromRegister(index, name);
}
} else {
m_methodInfo.pushParameterNameFromRegister(index, name);
}
} else {
;// skip code block locals
}
}
}
/**
* Converts the class name from VM type class name to Java type class name.
*
* @param className the VM type class name
* @return the Java type class name
*/
private static String getJavaClassName(final String className) {
String javaClassName;
if (className.startsWith("[")) {
javaClassName = Type.getType(className).getClassName();
} else {
javaClassName = className.replace('/', '.');
}
return javaClassName;
}
/**
* Returns the annotation reader
*
* @return
*/
public AnnotationReader getAnnotationReader() {
if (m_annotationReader == null) {
m_annotationReader = AnnotationReader.getReaderFor(
m_name,
ContextClassLoader.getLoaderOrSystemLoader((ClassLoader) m_loaderRef.get())
);
}
return m_annotationReader;
}
}