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199 lines
7.2 KiB
199 lines
7.2 KiB
package com.fr.third.aspectj.apache.bcel.classfile; |
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/* ==================================================================== |
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* The Apache Software License, Version 1.1 |
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* |
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* Copyright (c) 2001 The Apache Software Foundation. All rights |
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* reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes software developed by the |
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* Apache Software Foundation (http://www.apache.org/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Apache" and "Apache Software Foundation" and |
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* "Apache BCEL" must not be used to endorse or promote products |
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* derived from this software without prior written permission. For |
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* written permission, please contact apache@apache.org. |
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* |
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* 5. Products derived from this software may not be called "Apache", |
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* "Apache BCEL", nor may "Apache" appear in their name, without |
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* prior written permission of the Apache Software Foundation. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of the Apache Software Foundation. For more |
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* information on the Apache Software Foundation, please see |
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* <http://www.apache.org/>. |
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*/ |
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import java.io.DataInputStream; |
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import java.io.DataOutputStream; |
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import java.io.IOException; |
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import com.fr.third.aspectj.apache.bcel.Constants; |
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/** |
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* This class represents the table of exceptions that are thrown by a method. This attribute may be used once per method. The name |
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* of this class is <em>ExceptionTable</em> for historical reasons; The Java Virtual Machine Specification, Second Edition defines |
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* this attribute using the name <em>Exceptions</em> (which is inconsistent with the other classes). |
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* |
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* @version $Id: ExceptionTable.java,v 1.5 2009/09/15 19:40:12 aclement Exp $ |
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* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
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* @see Code |
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*/ |
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public final class ExceptionTable extends Attribute { |
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private int number_of_exceptions; // Table of indices into |
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private int[] exception_index_table; // constant pool |
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/** |
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* Initialize from another object. Note that both objects use the same references (shallow copy). Use copy() for a physical |
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* copy. |
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*/ |
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public ExceptionTable(ExceptionTable c) { |
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this(c.getNameIndex(), c.getLength(), c.getExceptionIndexTable(), c.getConstantPool()); |
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} |
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/** |
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* @param name_index Index in constant pool |
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* @param length Content length in bytes |
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* @param exception_index_table Table of indices in constant pool |
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* @param constant_pool Array of constants |
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*/ |
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public ExceptionTable(int name_index, int length, int[] exception_index_table, ConstantPool constant_pool) { |
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super(Constants.ATTR_EXCEPTIONS, name_index, length, constant_pool); |
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setExceptionIndexTable(exception_index_table); |
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} |
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/** |
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* Construct object from file stream. |
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* |
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* @param name_index Index in constant pool |
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* @param length Content length in bytes |
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* @param file Input stream |
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* @param constant_pool Array of constants |
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* @throws IOException |
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*/ |
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ExceptionTable(int name_index, int length, DataInputStream file, ConstantPool constant_pool) throws IOException { |
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this(name_index, length, (int[]) null, constant_pool); |
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number_of_exceptions = file.readUnsignedShort(); |
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exception_index_table = new int[number_of_exceptions]; |
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for (int i = 0; i < number_of_exceptions; i++) |
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exception_index_table[i] = file.readUnsignedShort(); |
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} |
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/** |
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* Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the |
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* hierarchy of methods, fields, attributes, etc. spawns a tree of objects. |
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* |
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* @param v Visitor object |
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*/ |
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@Override |
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public void accept(ClassVisitor v) { |
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v.visitExceptionTable(this); |
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} |
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/** |
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* Dump exceptions attribute to file stream in binary format. |
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* |
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* @param file Output file stream |
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* @throws IOException |
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*/ |
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@Override |
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public final void dump(DataOutputStream file) throws IOException { |
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super.dump(file); |
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file.writeShort(number_of_exceptions); |
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for (int i = 0; i < number_of_exceptions; i++) |
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file.writeShort(exception_index_table[i]); |
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} |
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/** |
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* @return Array of indices into constant pool of thrown exceptions. |
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*/ |
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public final int[] getExceptionIndexTable() { |
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return exception_index_table; |
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} |
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/** |
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* @return Length of exception table. |
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*/ |
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public final int getNumberOfExceptions() { |
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return number_of_exceptions; |
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} |
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/** |
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* @return class names of thrown exceptions |
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*/ |
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public final String[] getExceptionNames() { |
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String[] names = new String[number_of_exceptions]; |
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for (int i = 0; i < number_of_exceptions; i++) |
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names[i] = cpool.getConstantString(exception_index_table[i], Constants.CONSTANT_Class).replace('/', '.'); |
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return names; |
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} |
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/** |
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* @param exception_index_table. Also redefines number_of_exceptions according to table length. |
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*/ |
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public final void setExceptionIndexTable(int[] exception_index_table) { |
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this.exception_index_table = exception_index_table; |
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number_of_exceptions = (exception_index_table == null) ? 0 : exception_index_table.length; |
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} |
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/** |
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* @return String representation, i.e., a list of thrown exceptions. |
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*/ |
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@Override |
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public final String toString() { |
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StringBuffer buf = new StringBuffer(""); |
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String str; |
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for (int i = 0; i < number_of_exceptions; i++) { |
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str = cpool.getConstantString(exception_index_table[i], Constants.CONSTANT_Class); |
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buf.append(Utility.compactClassName(str, false)); |
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if (i < number_of_exceptions - 1) |
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buf.append(", "); |
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} |
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return buf.toString(); |
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} |
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// /** |
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// * @return deep copy of this attribute |
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// */ |
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// public Attribute copy(ConstantPool constant_pool) { |
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// ExceptionTable c = (ExceptionTable)clone(); |
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// c.exception_index_table = (int[])exception_index_table.clone(); |
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// c.cpool = constant_pool; |
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// return c; |
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// } |
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}
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