org.aspectj.apache.bcel.classfile.BootstrapMethods Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of aspectjweaver Show documentation
The AspectJ weaver introduces advices to java classes
There is a newer version: 1.9.22.1
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 (https://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 [email protected].
 *
 * 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
 * .
 */

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

import org.aspectj.apache.bcel.Constants;

/**
 * Represents the BootstrapMethods attribute in Java 7 classes.
 *
 * @author Andy Clement
 */
public final class BootstrapMethods extends Attribute {

	// if 'isInPackedState' then this data needs unpacking
	private boolean isInPackedState = false;
	private byte[] data; // discarded once unpacked

	private int numBootstrapMethods;
	private BootstrapMethod[] bootstrapMethods;

	public BootstrapMethods(BootstrapMethods c) {
		this(c.getNameIndex(), c.getLength(), c.getBootstrapMethods(), c.getConstantPool());
	}

	public BootstrapMethods(int nameIndex, int length, BootstrapMethod[] lineNumberTable, ConstantPool constantPool) {
		super(Constants.ATTR_BOOTSTRAPMETHODS, nameIndex, length, constantPool);
		setBootstrapMethods(lineNumberTable);
		isInPackedState = false;
	}

	public final void setBootstrapMethods(BootstrapMethod[] bootstrapMethods) {
		this.data = null;
		this.isInPackedState = false;
		this.bootstrapMethods = bootstrapMethods;
		this.numBootstrapMethods = bootstrapMethods==null?0:bootstrapMethods.length;
	}

	BootstrapMethods(int name_index, int length, DataInputStream file, ConstantPool constant_pool) throws IOException {
		this(name_index, length, (BootstrapMethod[])null, constant_pool);
		data = new byte[length];
		file.readFully(data);
		isInPackedState = true;
	}

	public static class BootstrapMethod {
		private int bootstrapMethodRef;
		private int[] bootstrapArguments;

		BootstrapMethod(DataInputStream file) throws IOException {
			this(file.readUnsignedShort(), readBootstrapArguments(file));
		}

		private static int[] readBootstrapArguments(DataInputStream dis) throws IOException {
			int numBootstrapMethods = dis.readUnsignedShort();
			int[] bootstrapArguments = new int[numBootstrapMethods];
			for (int i=0;i 72) {
				line.append('\n');
				buf.append(line);
				line.setLength(0);
			}
		}

		buf.append(line);

		return buf.toString();
	}


	/**
	 * @return deep copy of this attribute
	 */
	// @Override
	// public Attribute copy(ConstantPool constant_pool) {
	// unpack();
	// LineNumberTable newTable = (LineNumberTable) clone();
	// newTable.table = new LineNumber[tableLength];
	// for (int i = 0; i < tableLength; i++) {
	// newTable.table[i] = table[i].copy();
	// }
	// newTable.cpool = constant_pool;
	// return newTable;
	// }
	public final int getNumBootstrapMethods () {
		unpack();
		return bootstrapMethods.length;
	}
}