| /* |
| * 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 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 <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| * @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; |
| } |
| } |