com.sun.org.apache.bcel.internal.classfile.StackMapEntry Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jaxp-ri Show documentation
Show all versions of jaxp-ri Show documentation
Java API for XML Processing Reference Implementation
The newest version!
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
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 [email protected].
*
* 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
*
* @version $Id: StackMapEntry.java,v 1.3 2007-07-19 04:34:43 ofung Exp $
* @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;
}
}