/* * 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 * . */ import com.sun.org.apache.bcel.internal.Constants; import java.io.*; /** * This class represents a stack map entry recording the types of * local variables and the the of stack items at a given byte code offset. * See CLDC specification 5.3.1.2 * * @author M. Dahm * @see StackMap * @see StackMapType */ public final class StackMapEntry implements Cloneable { private int byte_code_offset; private int number_of_locals; private StackMapType[] types_of_locals; private int number_of_stack_items; private StackMapType[] types_of_stack_items; private ConstantPool constant_pool; /** * Construct object from file stream. * @param file Input stream * @throws IOException */ StackMapEntry(DataInputStream file, ConstantPool constant_pool) throws IOException { this(file.readShort(), file.readShort(), null, -1, null, constant_pool); types_of_locals = new StackMapType[number_of_locals]; for(int i=0; i < number_of_locals; i++) types_of_locals[i] = new StackMapType(file, constant_pool); number_of_stack_items = file.readShort(); types_of_stack_items = new StackMapType[number_of_stack_items]; for(int i=0; i < number_of_stack_items; i++) types_of_stack_items[i] = new StackMapType(file, constant_pool); } public StackMapEntry(int byte_code_offset, int number_of_locals, StackMapType[] types_of_locals, int number_of_stack_items, StackMapType[] types_of_stack_items, ConstantPool constant_pool) { this.byte_code_offset = byte_code_offset; this.number_of_locals = number_of_locals; this.types_of_locals = types_of_locals; this.number_of_stack_items = number_of_stack_items; this.types_of_stack_items = types_of_stack_items; this.constant_pool = constant_pool; } /** * Dump stack map entry * * @param file Output file stream * @throws IOException */ public final void dump(DataOutputStream file) throws IOException { file.writeShort(byte_code_offset); file.writeShort(number_of_locals); for(int i=0; i < number_of_locals; i++) types_of_locals[i].dump(file); file.writeShort(number_of_stack_items); for(int i=0; i < number_of_stack_items; i++) types_of_stack_items[i].dump(file); } /** * @return String representation. */ public final String toString() { StringBuffer buf = new StringBuffer("(offset=" + byte_code_offset); if(number_of_locals > 0) { buf.append(", locals={"); for(int i=0; i < number_of_locals; i++) { buf.append(types_of_locals[i]); if(i < number_of_locals - 1) buf.append(", "); } buf.append("}"); } if(number_of_stack_items > 0) { buf.append(", stack items={"); for(int i=0; i < number_of_stack_items; i++) { buf.append(types_of_stack_items[i]); if(i < number_of_stack_items - 1) buf.append(", "); } buf.append("}"); } buf.append(")"); return buf.toString(); } public void setByteCodeOffset(int b) { byte_code_offset = b; } public int getByteCodeOffset() { return byte_code_offset; } public void setNumberOfLocals(int n) { number_of_locals = n; } public int getNumberOfLocals() { return number_of_locals; } public void setTypesOfLocals(StackMapType[] t) { types_of_locals = t; } public StackMapType[] getTypesOfLocals() { return types_of_locals; } public void setNumberOfStackItems(int n) { number_of_stack_items = n; } public int getNumberOfStackItems() { return number_of_stack_items; } public void setTypesOfStackItems(StackMapType[] t) { types_of_stack_items = t; } public StackMapType[] getTypesOfStackItems() { return types_of_stack_items; } /** * @return deep copy of this object */ public StackMapEntry copy() { try { return (StackMapEntry)clone(); } catch(CloneNotSupportedException e) {} return null; } /** * 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.visitStackMapEntry(this); } /** * @return Constant pool used by this object. */ public final ConstantPool getConstantPool() { return constant_pool; } /** * @param constant_pool Constant pool to be used for this object. */ public final void setConstantPool(ConstantPool constant_pool) { this.constant_pool = constant_pool; } }