/* * reserved comment block * DO NOT REMOVE OR ALTER! */ package com.sun.org.apache.bcel.internal.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/>. */ import com.sun.org.apache.bcel.internal.Constants; import java.io.*; /** * This class represents a (PC offset, line number) pair, i.e., a line number in * the source that corresponds to a relative address in the byte code. This * is used for debugging purposes. * * @version $Id: LineNumber.java,v 1.1.2.1 2005/07/31 23:46:21 jeffsuttor Exp $ * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> * @see LineNumberTable */ public final class LineNumber implements Cloneable, Node, Serializable { private int start_pc; // Program Counter (PC) corresponds to line private int line_number; // number in source file /** * Initialize from another object. */ public LineNumber(LineNumber c) { this(c.getStartPC(), c.getLineNumber()); } /** * Construct object from file stream. * @param file Input stream * @throws IOException */ LineNumber(DataInputStream file) throws IOException { this(file.readUnsignedShort(), file.readUnsignedShort()); } /** * @param start_pc Program Counter (PC) corresponds to * @param line_number line number in source file */ public LineNumber(int start_pc, int line_number) { this.start_pc = start_pc; this.line_number = line_number; } /** * 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 */ public void accept(Visitor v) { v.visitLineNumber(this); } /** * Dump line number/pc pair to file stream in binary format. * * @param file Output file stream * @throws IOException */ public final void dump(DataOutputStream file) throws IOException { file.writeShort(start_pc); file.writeShort(line_number); } /** * @return Corresponding source line */ public final int getLineNumber() { return line_number; } /** * @return PC in code */ public final int getStartPC() { return start_pc; } /** * @param line_number. */ public final void setLineNumber(int line_number) { this.line_number = line_number; } /** * @param start_pc. */ public final void setStartPC(int start_pc) { this.start_pc = start_pc; } /** * @return String representation */ public final String toString() { return "LineNumber(" + start_pc + ", " + line_number + ")"; } /** * @return deep copy of this object */ public LineNumber copy() { try { return (LineNumber)clone(); } catch(CloneNotSupportedException e) {} return null; } }