org.aspectj.weaver/source/org/aspectj/apache/bcel/classfile/Signature.java - gerrit/ajdt/org.eclipse.ajdt - Git at Google

 package org.aspectj.apache.bcel.classfile;

 /* ====================================================================
  * The Apache Software License, Version 1.1
  *
  * Copyright (c) 2001 The Apache Software Foundation.  All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
  *
  * 3. The end-user documentation included with the redistribution,
  *    if any, must include the following acknowledgment:
  *       "This product includes software developed by the
  *        Apache Software Foundation (http://www.apache.org/)."
  *    Alternately, this acknowledgment may appear in the software itself,
  *    if and wherever such third-party acknowledgments normally appear.
  *
  * 4. The names "Apache" and "Apache Software Foundation" and
  *    "Apache BCEL" must not be used to endorse or promote products
  *    derived from this software without prior written permission. For
  *    written permission, please contact apache@apache.org.
  *
  * 5. Products derived from this software may not be called "Apache",
  *    "Apache BCEL", nor may "Apache" appear in their name, without
  *    prior written permission of the Apache Software Foundation.
  *
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  * ====================================================================
  *
  * This software consists of voluntary contributions made by many
  * individuals on behalf of the Apache Software Foundation.  For more
  * information on the Apache Software Foundation, please see
  * <http://www.apache.org/>.
  *
  * Extended by Adrian Colyer, June 2005 to support unpacking of Signature
  * attribute
  */

 import java.io.ByteArrayInputStream;
 import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;

 import org.aspectj.apache.bcel.Constants;

 /**
  * This class is derived from <em>Attribute</em> and represents a reference to a <href="http://wwwipd.ira.uka.de/~pizza/gj/">GJ</a>
  * attribute.
  *
  * @version $Id: Signature.java,v 1.11 2009/09/15 19:40:12 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see Attribute
  */
 public final class Signature extends Attribute {
 	private int signature_index;

 	/**
 	 * Initialize from another object. Note that both objects use the same references (shallow copy). Use clone() for a physical
 	 * copy.
 	 */
 	public Signature(Signature c) {
 		this(c.getNameIndex(), c.getLength(), c.getSignatureIndex(), c.getConstantPool());
 	}

 	/**
 	 * Construct object from file stream.
 	 *
 	 * @param name_index Index in constant pool to CONSTANT_Utf8
 	 * @param length Content length in bytes
 	 * @param file Input stream
 	 * @param constant_pool Array of constants
 	 * @throws IOException
 	 */
 	Signature(int name_index, int length, DataInputStream file, ConstantPool constant_pool) throws IOException {
 		this(name_index, length, file.readUnsignedShort(), constant_pool);
 	}

 	/**
 	 * @param name_index Index in constant pool to CONSTANT_Utf8
 	 * @param length Content length in bytes
 	 * @param constant_pool Array of constants
 	 * @param Signature_index Index in constant pool to CONSTANT_Utf8
 	 */
 	public Signature(int name_index, int length, int signature_index, ConstantPool constant_pool) {
 		super(Constants.ATTR_SIGNATURE, name_index, length, constant_pool);
 		this.signature_index = signature_index;
 	}

 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
 	 *
 	 * @param v Visitor object
 	 */
 	@Override
 	public void accept(ClassVisitor v) {
 		System.err.println("Visiting non-standard Signature object");
 		v.visitSignature(this);
 	}

 	/**
 	 * Dump source file attribute to file stream in binary format.
 	 *
 	 * @param file Output file stream
 	 * @throws IOException
 	 */
 	@Override
 	public final void dump(DataOutputStream file) throws IOException {
 		super.dump(file);
 		file.writeShort(signature_index);
 	}

 	/**
 	 * @return Index in constant pool of source file name.
 	 */
 	public final int getSignatureIndex() {
 		return signature_index;
 	}

 	/**
 	 * @param Signature_index.
 	 */
 	public final void setSignatureIndex(int signature_index) {
 		this.signature_index = signature_index;
 	}

 	/**
 	 * @return GJ signature.
 	 */
 	public final String getSignature() {
 		ConstantUtf8 c = (ConstantUtf8) cpool.getConstant(signature_index, Constants.CONSTANT_Utf8);
 		return c.getValue();
 	}

 	/**
 	 * Extends ByteArrayInputStream to make 'unreading' chars possible.
 	 */
 	private static final class MyByteArrayInputStream extends ByteArrayInputStream {
 		MyByteArrayInputStream(String data) {
 			super(data.getBytes());
 		}

 		final int mark() {
 			return pos;
 		}

 		final String getData() {
 			return new String(buf);
 		}

 		final void reset(int p) {
 			pos = p;
 		}

 		final void unread() {
 			if (pos > 0)
 				pos--;
 		}
 	}

 	private static boolean identStart(int ch) {
 		return ch == 'T' || ch == 'L';
 	}

 	private static final void matchIdent(MyByteArrayInputStream in, StringBuffer buf) {
 		int ch;

 		if ((ch = in.read()) == -1)
 			throw new RuntimeException("Illegal signature: " + in.getData() + " no ident, reaching EOF");

 		// System.out.println("return from ident:" + (char)ch);

 		if (!identStart(ch)) {
 			StringBuffer buf2 = new StringBuffer();

 			int count = 1;
 			while (Character.isJavaIdentifierPart((char) ch)) {
 				buf2.append((char) ch);
 				count++;
 				ch = in.read();
 			}

 			if (ch == ':') { // Ok, formal parameter
 				in.skip("Ljava/lang/Object".length());
 				buf.append(buf2);

 				ch = in.read();
 				in.unread();
 				// System.out.println("so far:" + buf2 + ":next:" +(char)ch);
 			} else {
 				for (int i = 0; i < count; i++)
 					in.unread();
 			}

 			return;
 		}

 		StringBuffer buf2 = new StringBuffer();
 		ch = in.read();

 		do {
 			buf2.append((char) ch);
 			ch = in.read();
 			// System.out.println("within ident:"+ (char)ch);

 		} while ((ch != -1) && (Character.isJavaIdentifierPart((char) ch) || (ch == '/')));

 		buf.append(buf2.toString().replace('/', '.'));

 		// System.out.println("regular return ident:"+ (char)ch + ":" + buf2);

 		if (ch != -1)
 			in.unread();
 	}

 	private static final void matchGJIdent(MyByteArrayInputStream in, StringBuffer buf) {
 		int ch;

 		matchIdent(in, buf);

 		ch = in.read();
 		if ((ch == '<') || ch == '(') { // Parameterized or method
 			// System.out.println("Enter <");
 			buf.append((char) ch);
 			matchGJIdent(in, buf);

 			while (((ch = in.read()) != '>') && (ch != ')')) { // List of parameters
 				if (ch == -1)
 					throw new RuntimeException("Illegal signature: " + in.getData() + " reaching EOF");

 				// System.out.println("Still no >");
 				buf.append(", ");
 				in.unread();
 				matchGJIdent(in, buf); // Recursive call
 			}

 			// System.out.println("Exit >");

 			buf.append((char) ch);
 		} else
 			in.unread();

 		ch = in.read();
 		if (identStart(ch)) {
 			in.unread();
 			matchGJIdent(in, buf);
 		} else if (ch == ')') {
 			in.unread();
 			return;
 		} else if (ch != ';')
 			throw new RuntimeException("Illegal signature: " + in.getData() + " read " + (char) ch);
 	}

 	public static String translate(String s) {
 		// System.out.println("Sig:" + s);
 		StringBuffer buf = new StringBuffer();

 		matchGJIdent(new MyByteArrayInputStream(s), buf);

 		return buf.toString();
 	}

 	public static final boolean isFormalParameterList(String s) {
 		return s.startsWith("<") && (s.indexOf(':') > 0);
 	}

 	public static final boolean isActualParameterList(String s) {
 		return s.startsWith("L") && s.endsWith(">;");
 	}

 	/**
 	 * @return String representation
 	 */
 	@Override
 	public final String toString() {
 		String s = getSignature();

 		return "Signature(" + s + ")";
 	}

 	// /**
 	// * @return deep copy of this attribute
 	// */
 	// @Override
 	// public Attribute copy(ConstantPool constant_pool) {
 	// return (Signature) clone();
 	// }

 }
	package org.aspectj.apache.bcel.classfile;

	/* ====================================================================
	* The Apache Software License, Version 1.1
	*
	* Copyright (c) 2001 The Apache Software Foundation. All rights
	* reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	*
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	*
	* 3. The end-user documentation included with the redistribution,
	* if any, must include the following acknowledgment:
	* "This product includes software developed by the
	* Apache Software Foundation (http://www.apache.org/)."
	* Alternately, this acknowledgment may appear in the software itself,
	* if and wherever such third-party acknowledgments normally appear.
	*
	* 4. The names "Apache" and "Apache Software Foundation" and
	* "Apache BCEL" must not be used to endorse or promote products
	* derived from this software without prior written permission. For
	* written permission, please contact apache@apache.org.
	*
	* 5. Products derived from this software may not be called "Apache",
	* "Apache BCEL", nor may "Apache" appear in their name, without
	* prior written permission of the Apache Software Foundation.
	*
	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	* ====================================================================
	*
	* This software consists of voluntary contributions made by many
	* individuals on behalf of the Apache Software Foundation. For more
	* information on the Apache Software Foundation, please see
	* <http://www.apache.org/>.
	*
	* Extended by Adrian Colyer, June 2005 to support unpacking of Signature
	* attribute
	*/

	import java.io.ByteArrayInputStream;
	import java.io.DataInputStream;
	import java.io.DataOutputStream;
	import java.io.IOException;

	import org.aspectj.apache.bcel.Constants;

	/**
	* This class is derived from <em>Attribute</em> and represents a reference to a <href="http://wwwipd.ira.uka.de/~pizza/gj/">GJ</a>
	* attribute.
	*
	* @version $Id: Signature.java,v 1.11 2009/09/15 19:40:12 aclement Exp $
	* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
	* @see Attribute
	*/
	public final class Signature extends Attribute {
	private int signature_index;

	/**
	* Initialize from another object. Note that both objects use the same references (shallow copy). Use clone() for a physical
	* copy.
	*/
	public Signature(Signature c) {
	this(c.getNameIndex(), c.getLength(), c.getSignatureIndex(), c.getConstantPool());
	}

	/**
	* Construct object from file stream.
	*
	* @param name_index Index in constant pool to CONSTANT_Utf8
	* @param length Content length in bytes
	* @param file Input stream
	* @param constant_pool Array of constants
	* @throws IOException
	*/
	Signature(int name_index, int length, DataInputStream file, ConstantPool constant_pool) throws IOException {
	this(name_index, length, file.readUnsignedShort(), constant_pool);
	}

	/**
	* @param name_index Index in constant pool to CONSTANT_Utf8
	* @param length Content length in bytes
	* @param constant_pool Array of constants
	* @param Signature_index Index in constant pool to CONSTANT_Utf8
	*/
	public Signature(int name_index, int length, int signature_index, ConstantPool constant_pool) {
	super(Constants.ATTR_SIGNATURE, name_index, length, constant_pool);
	this.signature_index = signature_index;
	}

	/**
	* Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
	* hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
	*
	* @param v Visitor object
	*/
	@Override
	public void accept(ClassVisitor v) {
	System.err.println("Visiting non-standard Signature object");
	v.visitSignature(this);
	}

	/**
	* Dump source file attribute to file stream in binary format.
	*
	* @param file Output file stream
	* @throws IOException
	*/
	@Override
	public final void dump(DataOutputStream file) throws IOException {
	super.dump(file);
	file.writeShort(signature_index);
	}

	/**
	* @return Index in constant pool of source file name.
	*/
	public final int getSignatureIndex() {
	return signature_index;
	}

	/**
	* @param Signature_index.
	*/
	public final void setSignatureIndex(int signature_index) {
	this.signature_index = signature_index;
	}

	/**
	* @return GJ signature.
	*/
	public final String getSignature() {
	ConstantUtf8 c = (ConstantUtf8) cpool.getConstant(signature_index, Constants.CONSTANT_Utf8);
	return c.getValue();
	}

	/**
	* Extends ByteArrayInputStream to make 'unreading' chars possible.
	*/
	private static final class MyByteArrayInputStream extends ByteArrayInputStream {
	MyByteArrayInputStream(String data) {
	super(data.getBytes());
	}

	final int mark() {
	return pos;
	}

	final String getData() {
	return new String(buf);
	}

	final void reset(int p) {
	pos = p;
	}

	final void unread() {
	if (pos > 0)
	pos--;
	}
	}

	private static boolean identStart(int ch) {
	return ch == 'T' \|\| ch == 'L';
	}

	private static final void matchIdent(MyByteArrayInputStream in, StringBuffer buf) {
	int ch;

	if ((ch = in.read()) == -1)
	throw new RuntimeException("Illegal signature: " + in.getData() + " no ident, reaching EOF");

	// System.out.println("return from ident:" + (char)ch);

	if (!identStart(ch)) {
	StringBuffer buf2 = new StringBuffer();

	int count = 1;
	while (Character.isJavaIdentifierPart((char) ch)) {
	buf2.append((char) ch);
	count++;
	ch = in.read();
	}

	if (ch == ':') { // Ok, formal parameter
	in.skip("Ljava/lang/Object".length());
	buf.append(buf2);

	ch = in.read();
	in.unread();
	// System.out.println("so far:" + buf2 + ":next:" +(char)ch);
	} else {
	for (int i = 0; i < count; i++)
	in.unread();
	}

	return;
	}

	StringBuffer buf2 = new StringBuffer();
	ch = in.read();

	do {
	buf2.append((char) ch);
	ch = in.read();
	// System.out.println("within ident:"+ (char)ch);

	} while ((ch != -1) && (Character.isJavaIdentifierPart((char) ch) \|\| (ch == '/')));

	buf.append(buf2.toString().replace('/', '.'));

	// System.out.println("regular return ident:"+ (char)ch + ":" + buf2);

	if (ch != -1)
	in.unread();
	}

	private static final void matchGJIdent(MyByteArrayInputStream in, StringBuffer buf) {
	int ch;

	matchIdent(in, buf);

	ch = in.read();
	if ((ch == '<') \|\| ch == '(') { // Parameterized or method
	// System.out.println("Enter <");
	buf.append((char) ch);
	matchGJIdent(in, buf);

	while (((ch = in.read()) != '>') && (ch != ')')) { // List of parameters
	if (ch == -1)
	throw new RuntimeException("Illegal signature: " + in.getData() + " reaching EOF");

	// System.out.println("Still no >");
	buf.append(", ");
	in.unread();
	matchGJIdent(in, buf); // Recursive call
	}

	// System.out.println("Exit >");

	buf.append((char) ch);
	} else
	in.unread();

	ch = in.read();
	if (identStart(ch)) {
	in.unread();
	matchGJIdent(in, buf);
	} else if (ch == ')') {
	in.unread();
	return;
	} else if (ch != ';')
	throw new RuntimeException("Illegal signature: " + in.getData() + " read " + (char) ch);
	}

	public static String translate(String s) {
	// System.out.println("Sig:" + s);
	StringBuffer buf = new StringBuffer();

	matchGJIdent(new MyByteArrayInputStream(s), buf);

	return buf.toString();
	}

	public static final boolean isFormalParameterList(String s) {
	return s.startsWith("<") && (s.indexOf(':') > 0);
	}

	public static final boolean isActualParameterList(String s) {
	return s.startsWith("L") && s.endsWith(">;");
	}

	/**
	* @return String representation
	*/
	@Override
	public final String toString() {
	String s = getSignature();

	return "Signature(" + s + ")";
	}

	// /**
	// * @return deep copy of this attribute
	// */
	// @Override
	// public Attribute copy(ConstantPool constant_pool) {
	// return (Signature) clone();
	// }

	}