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/*******************************************************************************
* Copyright (c) 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.p2.internal.repository.comparator;
import java.util.Arrays;
public class MethodInfo extends ClassFileStruct {
private int accessFlags;
private int attributeBytes;
private ClassFileAttribute[] attributes;
private int attributesCount;
private CodeAttribute codeAttribute;
private char[] descriptor;
private int descriptorIndex;
private ExceptionAttribute exceptionAttribute;
private boolean isDeprecated;
private boolean isSynthetic;
private char[] name;
private int nameIndex;
/*
* @param classFileBytes byte[]
* @param constantPool IConstantPool
* @param offset int
* @param decodingFlags int
*/
public MethodInfo(byte classFileBytes[], ConstantPool constantPool, int offset, int decodingFlags) throws ClassFormatException {
boolean no_code_attribute = (decodingFlags & ClassFileReader.METHOD_BODIES) == 0;
final int flags = u2At(classFileBytes, 0, offset);
this.accessFlags = flags;
if ((flags & IModifierConstants.ACC_SYNTHETIC) != 0) {
this.isSynthetic = true;
}
this.nameIndex = u2At(classFileBytes, 2, offset);
ConstantPoolEntry constantPoolEntry = constantPool.decodeEntry(this.nameIndex);
if (constantPoolEntry.getKind() != ConstantPoolConstant.CONSTANT_Utf8) {
throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
}
this.name = constantPoolEntry.getUtf8Value();
this.descriptorIndex = u2At(classFileBytes, 4, offset);
constantPoolEntry = constantPool.decodeEntry(this.descriptorIndex);
if (constantPoolEntry.getKind() != ConstantPoolConstant.CONSTANT_Utf8) {
throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
}
this.descriptor = constantPoolEntry.getUtf8Value();
this.attributesCount = u2At(classFileBytes, 6, offset);
this.attributes = ClassFileAttribute.NO_ATTRIBUTES;
if (this.attributesCount != 0) {
if (no_code_attribute && !isAbstract() && !isNative()) {
if (this.attributesCount != 1) {
this.attributes = new ClassFileAttribute[this.attributesCount - 1];
}
} else {
this.attributes = new ClassFileAttribute[this.attributesCount];
}
}
int attributesIndex = 0;
int readOffset = 8;
for (int i = 0; i < this.attributesCount; i++) {
constantPoolEntry = constantPool.decodeEntry(u2At(classFileBytes, readOffset, offset));
if (constantPoolEntry.getKind() != ConstantPoolConstant.CONSTANT_Utf8) {
throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
}
char[] attributeName = constantPoolEntry.getUtf8Value();
if (Arrays.equals(attributeName, AttributeNamesConstants.DEPRECATED)) {
this.isDeprecated = true;
this.attributes[attributesIndex++] = new ClassFileAttribute(classFileBytes, constantPool, offset + readOffset);
} else if (Arrays.equals(attributeName, AttributeNamesConstants.SYNTHETIC)) {
this.isSynthetic = true;
this.attributes[attributesIndex++] = new ClassFileAttribute(classFileBytes, constantPool, offset + readOffset);
} else if (Arrays.equals(attributeName, AttributeNamesConstants.CODE)) {
if (!no_code_attribute) {
this.codeAttribute = new CodeAttribute(classFileBytes, constantPool, offset + readOffset);
this.attributes[attributesIndex++] = this.codeAttribute;
}
} else if (Arrays.equals(attributeName, AttributeNamesConstants.EXCEPTIONS)) {
this.exceptionAttribute = new ExceptionAttribute(classFileBytes, constantPool, offset + readOffset);
this.attributes[attributesIndex++] = this.exceptionAttribute;
} else if (Arrays.equals(attributeName, AttributeNamesConstants.SIGNATURE)) {
this.attributes[attributesIndex++] = new SignatureAttribute(classFileBytes, constantPool, offset + readOffset);
} else if (Arrays.equals(attributeName, AttributeNamesConstants.RUNTIME_VISIBLE_ANNOTATIONS)) {
this.attributes[attributesIndex++] = new RuntimeVisibleAnnotationsAttribute(classFileBytes, constantPool, offset + readOffset);
} else if (Arrays.equals(attributeName, AttributeNamesConstants.RUNTIME_INVISIBLE_ANNOTATIONS)) {
this.attributes[attributesIndex++] = new RuntimeInvisibleAnnotationsAttribute(classFileBytes, constantPool, offset + readOffset);
} else if (Arrays.equals(attributeName, AttributeNamesConstants.RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS)) {
this.attributes[attributesIndex++] = new RuntimeVisibleParameterAnnotationsAttribute(classFileBytes, constantPool, offset + readOffset);
} else if (Arrays.equals(attributeName, AttributeNamesConstants.RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS)) {
this.attributes[attributesIndex++] = new RuntimeInvisibleParameterAnnotationsAttribute(classFileBytes, constantPool, offset + readOffset);
} else if (Arrays.equals(attributeName, AttributeNamesConstants.ANNOTATION_DEFAULT)) {
this.attributes[attributesIndex++] = new AnnotationDefaultAttribute(classFileBytes, constantPool, offset + readOffset);
} else {
this.attributes[attributesIndex++] = new ClassFileAttribute(classFileBytes, constantPool, offset + readOffset);
}
readOffset += (6 + u4At(classFileBytes, readOffset + 2, offset));
}
this.attributeBytes = readOffset;
}
/*
* @see IMethodInfo#getAccessFlags()
*/
public int getAccessFlags() {
return this.accessFlags;
}
/*
* @see IMethodInfo#getAttributeCount()
*/
public int getAttributeCount() {
return this.attributesCount;
}
/*
* @see IMethodInfo#getAttributes()
*/
public ClassFileAttribute[] getAttributes() {
return this.attributes;
}
/*
* @see IMethodInfo#getCodeAttribute()
*/
public CodeAttribute getCodeAttribute() {
return this.codeAttribute;
}
/*
* @see IMethodInfo#getDescriptor()
*/
public char[] getDescriptor() {
return this.descriptor;
}
/*
* @see IMethodInfo#getDescriptorIndex()
*/
public int getDescriptorIndex() {
return this.descriptorIndex;
}
/*
* @see IMethodInfo#getExceptionAttribute()
*/
public ExceptionAttribute getExceptionAttribute() {
return this.exceptionAttribute;
}
/*
* @see IMethodInfo#getName()
*/
public char[] getName() {
return this.name;
}
/*
* @see IMethodInfo#getNameIndex()
*/
public int getNameIndex() {
return this.nameIndex;
}
private boolean isAbstract() {
return (this.accessFlags & IModifierConstants.ACC_ABSTRACT) != 0;
}
/*
* @see IMethodInfo#isClinit()
*/
public boolean isClinit() {
return this.name[0] == '<' && this.name.length == 8; // Can only match <clinit>
}
/*
* @see IMethodInfo#isConstructor()
*/
public boolean isConstructor() {
return this.name[0] == '<' && this.name.length == 6; // Can only match <init>
}
/*
* @see IMethodInfo#isDeprecated()
*/
public boolean isDeprecated() {
return this.isDeprecated;
}
private boolean isNative() {
return (this.accessFlags & IModifierConstants.ACC_NATIVE) != 0;
}
/*
* @see IMethodInfo#isSynthetic()
*/
public boolean isSynthetic() {
return this.isSynthetic;
}
int sizeInBytes() {
return this.attributeBytes;
}
}
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