- 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 1.1.1.1 2001/10/29 20:00:02 jvanzyl Exp $
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- * @see LineNumberTable
- */
- public final class LineNumber implements Cloneable, Node {
- 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
- * @throw 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
- * @throw 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;
- }
- }