- 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).
- *
- * @version $Id: ExceptionTable.java,v 1.1.1.1 2001/10/29 20:00:00 jvanzyl Exp $
- * @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
- * @throw 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
- * @throw 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;
- }
- }