- 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 attribute used for
- * preverification of Java classes for the <a
- * href="http://java.sun.com/j2me/"> Java 2 Micro Edition</a>
- * (J2ME). This attribute is used by the <a
- * href="http://java.sun.com/products/cldc/">KVM</a> and contained
- * within the Code attribute of a method. See CLDC specification
- * ÷5.3.1.2
- *
- * @version $Id: StackMap.java,v 1.1.1.1 2001/10/29 20:00:03 jvanzyl Exp $
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- * @see Code
- * @see StackMapEntry
- * @see StackMapType
- */
- public final class StackMap extends Attribute implements Node {
- private int map_length;
- private StackMapEntry[] map; // Table of stack map entries
-
- /*
- * @param name_index Index of name
- * @param length Content length in bytes
- * @param map Table of stack map entries
- * @param constant_pool Array of constants
- */
- public StackMap(int name_index, int length, StackMapEntry[] map,
- ConstantPool constant_pool)
- {
- super(Constants.ATTR_STACK_MAP, name_index, length, constant_pool);
-
- setStackMap(map);
- }
-
- /**
- * Construct object from file stream.
- * @param name_index Index of name
- * @param length Content length in bytes
- * @param file Input stream
- * @throw IOException
- * @param constant_pool Array of constants
- */
- StackMap(int name_index, int length, DataInputStream file,
- ConstantPool constant_pool) throws IOException
- {
- this(name_index, length, (StackMapEntry[])null, constant_pool);
-
- map_length = file.readUnsignedShort();
- map = new StackMapEntry[map_length];
-
- for(int i=0; i < map_length; i++)
- map[i] = new StackMapEntry(file, constant_pool);
- }
-
- /**
- * Dump line number table 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(map_length);
- for(int i=0; i < map_length; i++)
- map[i].dump(file);
- }
-
- /**
- * @return Array of stack map entries
- */
- public final StackMapEntry[] getStackMap() { return map; }
-
- /**
- * @param map Array of stack map entries
- */
- public final void setStackMap(StackMapEntry[] map) {
- this.map = map;
-
- map_length = (map == null)? 0 : map.length;
- }
-
- /**
- * @return String representation.
- */
- public final String toString() {
- StringBuffer buf = new StringBuffer("StackMap(");
-
- for(int i=0; i < map_length; i++) {
- buf.append(map[i].toString());
-
- if(i < map_length - 1)
- buf.append(", ");
- }
-
- buf.append(')');
-
- return buf.toString();
- }
-
- /**
- * @return deep copy of this attribute
- */
- public Attribute copy(ConstantPool constant_pool) {
- StackMap c = (StackMap)clone();
-
- c.map = new StackMapEntry[map_length];
- for(int i=0; i < map_length; i++)
- c.map[i] = map[i].copy();
-
- c.constant_pool = constant_pool;
- return c;
- }
-
- /**
- * 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.visitStackMap(this);
- }
-
- public final int getMapLength() { return map_length; }
- }