| /* |
| * 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 the table of exceptions that are thrown by a |
| * method. This attribute may be used once per method. The name of |
| * this class is <em>ExceptionTable</em> for historical reasons; The |
| * Java Virtual Machine Specification, Second Edition defines this |
| * attribute using the name <em>Exceptions</em> (which is inconsistent |
| * with the other classes). |
| * |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| * @see Code |
| */ |
| public final class ExceptionTable extends Attribute { |
| private int number_of_exceptions; // Table of indices into |
| private int[] exception_index_table; // constant pool |
| |
| /** |
| * Initialize from another object. Note that both objects use the same |
| * references (shallow copy). Use copy() for a physical copy. |
| */ |
| public ExceptionTable(ExceptionTable c) { |
| this(c.getNameIndex(), c.getLength(), c.getExceptionIndexTable(), |
| c.getConstantPool()); |
| } |
| |
| /** |
| * @param name_index Index in constant pool |
| * @param length Content length in bytes |
| * @param exception_index_table Table of indices in constant pool |
| * @param constant_pool Array of constants |
| */ |
| public ExceptionTable(int name_index, int length, |
| int[] exception_index_table, |
| ConstantPool constant_pool) |
| { |
| super(Constants.ATTR_EXCEPTIONS, name_index, length, constant_pool); |
| setExceptionIndexTable(exception_index_table); |
| } |
| |
| /** |
| * Construct object from file stream. |
| * @param name_index Index in constant pool |
| * @param length Content length in bytes |
| * @param file Input stream |
| * @param constant_pool Array of constants |
| * @throws IOException |
| */ |
| ExceptionTable(int name_index, int length, DataInputStream file, |
| ConstantPool constant_pool) throws IOException |
| { |
| this(name_index, length, (int[])null, constant_pool); |
| |
| number_of_exceptions = file.readUnsignedShort(); |
| exception_index_table = new int[number_of_exceptions]; |
| |
| for(int i=0; i < number_of_exceptions; i++) |
| exception_index_table[i] = file.readUnsignedShort(); |
| } |
| |
| /** |
| * 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.visitExceptionTable(this); |
| } |
| |
| /** |
| * Dump exceptions attribute to file stream in binary format. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| public final void dump(DataOutputStream file) throws IOException |
| { |
| super.dump(file); |
| file.writeShort(number_of_exceptions); |
| for(int i=0; i < number_of_exceptions; i++) |
| file.writeShort(exception_index_table[i]); |
| } |
| |
| /** |
| * @return Array of indices into constant pool of thrown exceptions. |
| */ |
| public final int[] getExceptionIndexTable() {return exception_index_table;} |
| /** |
| * @return Length of exception table. |
| */ |
| public final int getNumberOfExceptions() { return number_of_exceptions; } |
| |
| /** |
| * @return class names of thrown exceptions |
| */ |
| public final String[] getExceptionNames() { |
| String[] names = new String[number_of_exceptions]; |
| for(int i=0; i < number_of_exceptions; i++) |
| names[i] = constant_pool.getConstantString(exception_index_table[i], |
| Constants.CONSTANT_Class). |
| replace('/', '.'); |
| return names; |
| } |
| |
| /** |
| * @param exception_index_table. |
| * Also redefines number_of_exceptions according to table length. |
| */ |
| public final void setExceptionIndexTable(int[] exception_index_table) { |
| this.exception_index_table = exception_index_table; |
| number_of_exceptions = (exception_index_table == null)? 0 : |
| exception_index_table.length; |
| } |
| /** |
| * @return String representation, i.e., a list of thrown exceptions. |
| */ |
| public final String toString() { |
| StringBuffer buf = new StringBuffer(""); |
| String str; |
| |
| for(int i=0; i < number_of_exceptions; i++) { |
| str = constant_pool.getConstantString(exception_index_table[i], |
| Constants.CONSTANT_Class); |
| buf.append(Utility.compactClassName(str, false)); |
| |
| if(i < number_of_exceptions - 1) |
| buf.append(", "); |
| } |
| |
| return buf.toString(); |
| } |
| |
| /** |
| * @return deep copy of this attribute |
| */ |
| public Attribute copy(ConstantPool constant_pool) { |
| ExceptionTable c = (ExceptionTable)clone(); |
| c.exception_index_table = (int[])exception_index_table.clone(); |
| c.constant_pool = constant_pool; |
| return c; |
| } |
| } |