/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
package com.sun.org.apache.bcel.internal.classfile;
/* ====================================================================
* The Apache Software License, Version 1.1
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* reserved.
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* modification, are permitted provided that the following conditions
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*
* 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
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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 1.1.2.1 2005/07/31 23:46:28 jeffsuttor 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
* @throws 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
* @throws 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; }
}