org.eclipse.jdt.core.tests.model/workspace/Compiler/src/org/eclipse/jdt/internal/compiler/classfmt/MethodInfo.java - jdt/eclipse.jdt.core - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2004 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.internal.compiler.classfmt;

 import org.eclipse.jdt.core.compiler.CharOperation;
 import org.eclipse.jdt.internal.compiler.codegen.AttributeNamesConstants;
 import org.eclipse.jdt.internal.compiler.env.IBinaryMethod;

 public class MethodInfo extends ClassFileStruct implements IBinaryMethod, AttributeNamesConstants, Comparable {
 	static private final char[][] noException = CharOperation.NO_CHAR_CHAR;
 	private int accessFlags;
 	private int attributeBytes;
 	private int[] constantPoolOffsets;
 	private char[] descriptor;
 	private char[][] exceptionNames;
 	private char[] name;
 	private char[] signature;
 	private int signatureUtf8Offset;

 /**
  * @param classFileBytes byte[]
  * @param offsets int[]
  * @param offset int
  */
 public MethodInfo (byte classFileBytes[], int offsets[], int offset) {
 	super(classFileBytes, offset);
 	constantPoolOffsets = offsets;
 	accessFlags = -1;
 	int attributesCount = u2At(6);
 	int readOffset = 8;
 	this.signatureUtf8Offset = -1;
 	for (int i = 0; i < attributesCount; i++) {
 		// check the name of each attribute
 		int utf8Offset = constantPoolOffsets[u2At(readOffset)] - structOffset;
 		char[] attributeName = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
 		if (CharOperation.equals(AttributeNamesConstants.SignatureName, attributeName)) {
 			this.signatureUtf8Offset = constantPoolOffsets[u2At(readOffset + 6)] - structOffset;
 		}
 		readOffset += (6 + u4At(readOffset + 2));
 	}
 	attributeBytes = readOffset;
 }
 public int compareTo(Object o) {
 	if (!(o instanceof MethodInfo)) {
 		throw new ClassCastException();
 	}

 	MethodInfo otherMethod = (MethodInfo) o;
 	int result = new String(this.getSelector()).compareTo(new String(otherMethod.getSelector()));
 	if (result != 0) return result;
 	return new String(this.getMethodDescriptor()).compareTo(new String(otherMethod.getMethodDescriptor()));
 }
 /**
  * @see org.eclipse.jdt.internal.compiler.env.IGenericMethod#getArgumentNames()
  */
 public char[][] getArgumentNames() {
 	return null;
 }
 /**
  * Answer the resolved names of the exception types in the
  * class file format as specified in section 4.2 of the Java 2 VM spec
  * or null if the array is empty.
  *
  * For example, java.lang.String is java/lang/String.
  * @return char[][]
  */
 public char[][] getExceptionTypeNames() {
 	if (exceptionNames == null) {
 		readExceptionAttributes();
 	}
 	return exceptionNames;
 }
 public char[] getGenericSignature() {
 	if (this.signatureUtf8Offset != -1) {
 		if (this.signature == null) {
 			// decode the signature
 			this.signature = utf8At(this.signatureUtf8Offset + 3, u2At(this.signatureUtf8Offset + 1));
 		}
 		return this.signature;
 	}
 	return null;
 }
 /**
  * Answer the receiver's method descriptor which describes the parameter &
  * return types as specified in section 4.3.3 of the Java 2 VM spec.
  *
  * For example:
  *   - int foo(String) is (Ljava/lang/String;)I
  *   - void foo(Object[]) is (I)[Ljava/lang/Object;
  * @return char[]
  */
 public char[] getMethodDescriptor() {
 	if (descriptor == null) {
 		// read the name
 		int utf8Offset = constantPoolOffsets[u2At(4)] - structOffset;
 		descriptor = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
 	}
 	return descriptor;
 }
 /**
  * Answer an int whose bits are set according the access constants
  * defined by the VM spec.
  * Set the AccDeprecated and AccSynthetic bits if necessary
  * @return int
  */
 public int getModifiers() {
 	if (this.accessFlags == -1) {
 		// compute the accessflag. Don't forget the deprecated attribute
 		this.accessFlags = u2At(0);
 		readDeprecatedAndSyntheticAttributes();
 	}
 	return this.accessFlags;
 }
 /**
  * Answer the name of the method.
  *
  * For a constructor, answer <init> & <clinit> for a clinit method.
  * @return char[]
  */
 public char[] getSelector() {
 	if (name == null) {
 		// read the name
 		int utf8Offset = constantPoolOffsets[u2At(2)] - structOffset;
 		name = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
 	}
 	return name;
 }
 /**
  * This method is used to fully initialize the contents of the receiver. All methodinfos, fields infos
  * will be therefore fully initialized and we can get rid of the bytes.
  */
 void initialize() {
 	getModifiers();
 	getSelector();
 	getMethodDescriptor();
 	getExceptionTypeNames();
 	getGenericSignature();
 	reset();
 }
 /**
  * Answer true if the method is a class initializer, false otherwise.
  * @return boolean
  */
 public boolean isClinit() {
 	char[] selector = getSelector();
 	return selector[0] == '<' && selector.length == 8; // Can only match <clinit>
 }
 /**
  * Answer true if the method is a constructor, false otherwise.
  * @return boolean
  */
 public boolean isConstructor() {
 	char[] selector = getSelector();
 	return selector[0] == '<' && selector.length == 6; // Can only match <init>
 }
 /**
  * Return true if the field is a synthetic method, false otherwise.
  * @return boolean
  */
 public boolean isSynthetic() {
 	return (getModifiers() & AccSynthetic) != 0;
 }
 private void readDeprecatedAndSyntheticAttributes() {
 	int attributesCount = u2At(6);
 	int readOffset = 8;
 	for (int i = 0; i < attributesCount; i++) {
 		int utf8Offset = constantPoolOffsets[u2At(readOffset)] - structOffset;
 		char[] attributeName = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
 		if (CharOperation.equals(attributeName, DeprecatedName)) {
 			this.accessFlags |= AccDeprecated;
 		} else if (CharOperation.equals(attributeName, SyntheticName)) {
 			this.accessFlags |= AccSynthetic;
 		}
 		readOffset += (6 + u4At(readOffset + 2));
 	}
 }
 private void readExceptionAttributes() {
 	int attributesCount = u2At(6);
 	int readOffset = 8;
 	for (int i = 0; i < attributesCount; i++) {
 		int utf8Offset = constantPoolOffsets[u2At(readOffset)] - structOffset;
 		char[] attributeName = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
 		if (CharOperation.equals(attributeName, ExceptionsName)) {
 			// read the number of exception entries
 			int entriesNumber = u2At(readOffset + 6);
 			// place the readOffset at the beginning of the exceptions table
 			readOffset += 8;
 			if (entriesNumber == 0) {
 				exceptionNames = noException;
 			} else {
 				exceptionNames = new char[entriesNumber][];
 				for (int j = 0; j < entriesNumber; j++) {
 					utf8Offset =
 						constantPoolOffsets[u2At(
 							constantPoolOffsets[u2At(readOffset)] - structOffset + 1)]
 							- structOffset;
 					exceptionNames[j] = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
 					readOffset += 2;
 				}
 			}
 		} else {
 			readOffset += (6 + u4At(readOffset + 2));
 		}
 	}
 	if (exceptionNames == null) {
 		exceptionNames = noException;
 	}
 }
 protected void reset() {
 	this.constantPoolOffsets = null;
 	super.reset();
 }
 /**
  * Answer the size of the receiver in bytes.
  *
  * @return int
  */
 public int sizeInBytes() {
 	return attributeBytes;
 }
 public String toString() {
 	int modifiers = getModifiers();
 	char[] desc = getGenericSignature();
 	if (desc == null)
 		desc = getMethodDescriptor();
 	StringBuffer buffer = new StringBuffer(this.getClass().getName());
 	return buffer
 		.append("{") //$NON-NLS-1$
 		.append(
 			((modifiers & AccDeprecated) != 0 ? "deprecated " : "") //$NON-NLS-1$ //$NON-NLS-2$
 				+ ((modifiers & 0x0001) == 1 ? "public " : "") //$NON-NLS-1$ //$NON-NLS-2$
 				+ ((modifiers & 0x0002) == 0x0002 ? "private " : "") //$NON-NLS-1$ //$NON-NLS-2$
 				+ ((modifiers & 0x0004) == 0x0004 ? "protected " : "") //$NON-NLS-1$ //$NON-NLS-2$
 				+ ((modifiers & 0x0008) == 0x000008 ? "static " : "") //$NON-NLS-1$ //$NON-NLS-2$
 				+ ((modifiers & 0x0010) == 0x0010 ? "final " : "") //$NON-NLS-1$ //$NON-NLS-2$
 				+ ((modifiers & 0x0040) == 0x0040 ? "volatile " : "") //$NON-NLS-1$ //$NON-NLS-2$
 				+ ((modifiers & 0x0080) == 0x0080 ? "transient " : "")) //$NON-NLS-1$ //$NON-NLS-2$
 		.append(getSelector())
 		.append(desc)
 		.append("}") //$NON-NLS-1$
 		.toString();
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2004 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.internal.compiler.classfmt;

	import org.eclipse.jdt.core.compiler.CharOperation;
	import org.eclipse.jdt.internal.compiler.codegen.AttributeNamesConstants;
	import org.eclipse.jdt.internal.compiler.env.IBinaryMethod;

	public class MethodInfo extends ClassFileStruct implements IBinaryMethod, AttributeNamesConstants, Comparable {
	static private final char[][] noException = CharOperation.NO_CHAR_CHAR;
	private int accessFlags;
	private int attributeBytes;
	private int[] constantPoolOffsets;
	private char[] descriptor;
	private char[][] exceptionNames;
	private char[] name;
	private char[] signature;
	private int signatureUtf8Offset;

	/**
	* @param classFileBytes byte[]
	* @param offsets int[]
	* @param offset int
	*/
	public MethodInfo (byte classFileBytes[], int offsets[], int offset) {
	super(classFileBytes, offset);
	constantPoolOffsets = offsets;
	accessFlags = -1;
	int attributesCount = u2At(6);
	int readOffset = 8;
	this.signatureUtf8Offset = -1;
	for (int i = 0; i < attributesCount; i++) {
	// check the name of each attribute
	int utf8Offset = constantPoolOffsets[u2At(readOffset)] - structOffset;
	char[] attributeName = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
	if (CharOperation.equals(AttributeNamesConstants.SignatureName, attributeName)) {
	this.signatureUtf8Offset = constantPoolOffsets[u2At(readOffset + 6)] - structOffset;
	}
	readOffset += (6 + u4At(readOffset + 2));
	}
	attributeBytes = readOffset;
	}
	public int compareTo(Object o) {
	if (!(o instanceof MethodInfo)) {
	throw new ClassCastException();
	}

	MethodInfo otherMethod = (MethodInfo) o;
	int result = new String(this.getSelector()).compareTo(new String(otherMethod.getSelector()));
	if (result != 0) return result;
	return new String(this.getMethodDescriptor()).compareTo(new String(otherMethod.getMethodDescriptor()));
	}
	/**
	* @see org.eclipse.jdt.internal.compiler.env.IGenericMethod#getArgumentNames()
	*/
	public char[][] getArgumentNames() {
	return null;
	}
	/**
	* Answer the resolved names of the exception types in the
	* class file format as specified in section 4.2 of the Java 2 VM spec
	* or null if the array is empty.
	*
	* For example, java.lang.String is java/lang/String.
	* @return char[][]
	*/
	public char[][] getExceptionTypeNames() {
	if (exceptionNames == null) {
	readExceptionAttributes();
	}
	return exceptionNames;
	}
	public char[] getGenericSignature() {
	if (this.signatureUtf8Offset != -1) {
	if (this.signature == null) {
	// decode the signature
	this.signature = utf8At(this.signatureUtf8Offset + 3, u2At(this.signatureUtf8Offset + 1));
	}
	return this.signature;
	}
	return null;
	}
	/**
	* Answer the receiver's method descriptor which describes the parameter &
	* return types as specified in section 4.3.3 of the Java 2 VM spec.
	*
	* For example:
	* - int foo(String) is (Ljava/lang/String;)I
	* - void foo(Object[]) is (I)[Ljava/lang/Object;
	* @return char[]
	*/
	public char[] getMethodDescriptor() {
	if (descriptor == null) {
	// read the name
	int utf8Offset = constantPoolOffsets[u2At(4)] - structOffset;
	descriptor = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
	}
	return descriptor;
	}
	/**
	* Answer an int whose bits are set according the access constants
	* defined by the VM spec.
	* Set the AccDeprecated and AccSynthetic bits if necessary
	* @return int
	*/
	public int getModifiers() {
	if (this.accessFlags == -1) {
	// compute the accessflag. Don't forget the deprecated attribute
	this.accessFlags = u2At(0);
	readDeprecatedAndSyntheticAttributes();
	}
	return this.accessFlags;
	}
	/**
	* Answer the name of the method.
	*
	* For a constructor, answer <init> & <clinit> for a clinit method.
	* @return char[]
	*/
	public char[] getSelector() {
	if (name == null) {
	// read the name
	int utf8Offset = constantPoolOffsets[u2At(2)] - structOffset;
	name = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
	}
	return name;
	}
	/**
	* This method is used to fully initialize the contents of the receiver. All methodinfos, fields infos
	* will be therefore fully initialized and we can get rid of the bytes.
	*/
	void initialize() {
	getModifiers();
	getSelector();
	getMethodDescriptor();
	getExceptionTypeNames();
	getGenericSignature();
	reset();
	}
	/**
	* Answer true if the method is a class initializer, false otherwise.
	* @return boolean
	*/
	public boolean isClinit() {
	char[] selector = getSelector();
	return selector[0] == '<' && selector.length == 8; // Can only match <clinit>
	}
	/**
	* Answer true if the method is a constructor, false otherwise.
	* @return boolean
	*/
	public boolean isConstructor() {
	char[] selector = getSelector();
	return selector[0] == '<' && selector.length == 6; // Can only match <init>
	}
	/**
	* Return true if the field is a synthetic method, false otherwise.
	* @return boolean
	*/
	public boolean isSynthetic() {
	return (getModifiers() & AccSynthetic) != 0;
	}
	private void readDeprecatedAndSyntheticAttributes() {
	int attributesCount = u2At(6);
	int readOffset = 8;
	for (int i = 0; i < attributesCount; i++) {
	int utf8Offset = constantPoolOffsets[u2At(readOffset)] - structOffset;
	char[] attributeName = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
	if (CharOperation.equals(attributeName, DeprecatedName)) {
	this.accessFlags \|= AccDeprecated;
	} else if (CharOperation.equals(attributeName, SyntheticName)) {
	this.accessFlags \|= AccSynthetic;
	}
	readOffset += (6 + u4At(readOffset + 2));
	}
	}
	private void readExceptionAttributes() {
	int attributesCount = u2At(6);
	int readOffset = 8;
	for (int i = 0; i < attributesCount; i++) {
	int utf8Offset = constantPoolOffsets[u2At(readOffset)] - structOffset;
	char[] attributeName = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
	if (CharOperation.equals(attributeName, ExceptionsName)) {
	// read the number of exception entries
	int entriesNumber = u2At(readOffset + 6);
	// place the readOffset at the beginning of the exceptions table
	readOffset += 8;
	if (entriesNumber == 0) {
	exceptionNames = noException;
	} else {
	exceptionNames = new char[entriesNumber][];
	for (int j = 0; j < entriesNumber; j++) {
	utf8Offset =
	constantPoolOffsets[u2At(
	constantPoolOffsets[u2At(readOffset)] - structOffset + 1)]
	- structOffset;
	exceptionNames[j] = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
	readOffset += 2;
	}
	}
	} else {
	readOffset += (6 + u4At(readOffset + 2));
	}
	}
	if (exceptionNames == null) {
	exceptionNames = noException;
	}
	}
	protected void reset() {
	this.constantPoolOffsets = null;
	super.reset();
	}
	/**
	* Answer the size of the receiver in bytes.
	*
	* @return int
	*/
	public int sizeInBytes() {
	return attributeBytes;
	}
	public String toString() {
	int modifiers = getModifiers();
	char[] desc = getGenericSignature();
	if (desc == null)
	desc = getMethodDescriptor();
	StringBuffer buffer = new StringBuffer(this.getClass().getName());
	return buffer
	.append("{") //$NON-NLS-1$
	.append(
	((modifiers & AccDeprecated) != 0 ? "deprecated " : "") //$NON-NLS-1$ //$NON-NLS-2$
	+ ((modifiers & 0x0001) == 1 ? "public " : "") //$NON-NLS-1$ //$NON-NLS-2$
	+ ((modifiers & 0x0002) == 0x0002 ? "private " : "") //$NON-NLS-1$ //$NON-NLS-2$
	+ ((modifiers & 0x0004) == 0x0004 ? "protected " : "") //$NON-NLS-1$ //$NON-NLS-2$
	+ ((modifiers & 0x0008) == 0x000008 ? "static " : "") //$NON-NLS-1$ //$NON-NLS-2$
	+ ((modifiers & 0x0010) == 0x0010 ? "final " : "") //$NON-NLS-1$ //$NON-NLS-2$
	+ ((modifiers & 0x0040) == 0x0040 ? "volatile " : "") //$NON-NLS-1$ //$NON-NLS-2$
	+ ((modifiers & 0x0080) == 0x0080 ? "transient " : "")) //$NON-NLS-1$ //$NON-NLS-2$
	.append(getSelector())
	.append(desc)
	.append("}") //$NON-NLS-1$
	.toString();
	}
	}