| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| package org.apache.tomcat.util.bcel.classfile; |
| |
| import java.io.DataInput; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.io.Serializable; |
| |
| /** |
| * 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 2011/06/28 21:08:23 rherrmann Exp $ |
| * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A> |
| * @see LineNumberTable |
| */ |
| public final class LineNumber implements Cloneable, Serializable { |
| |
| private static final long serialVersionUID = 3393830630264494355L; |
| private int start_pc; // Program Counter (PC) corresponds to line |
| private int line_number; // number in source file |
| |
| |
| /** |
| * Construct object from file stream. |
| * @param file Input stream |
| * @throws IOException |
| */ |
| LineNumber(DataInput 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; |
| } |
| |
| |
| /** |
| * 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 String representation |
| */ |
| @Override |
| 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; |
| } |
| } |