/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* Copyright 2002-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: OpMapVector.java,v 1.2.4.1 2005/09/10 03:57:14 jeffsuttor Exp $
*/
package com.sun.org.apache.xpath.internal.compiler;
/**
*
* Like IntVector, but used only for the OpMap array. Length of array
* is kept in the m_lengthPos position of the array. Only the required methods
* are in included here.
* @xsl.usage internal
*/
public class OpMapVector {
/** Size of blocks to allocate */
protected int m_blocksize;
/** Array of ints */
protected int m_map[]; // IntStack is trying to see this directly
/** Position where size of array is kept */
protected int m_lengthPos = 0;
/** Size of array */
protected int m_mapSize;
/**
* Construct a OpMapVector, using the given block size.
*
* @param blocksize Size of block to allocate
*/
public OpMapVector(int blocksize, int increaseSize, int lengthPos)
{
m_blocksize = increaseSize;
m_mapSize = blocksize;
m_lengthPos = lengthPos;
m_map = new int[blocksize];
}
/**
* Get the nth element.
*
* @param i index of object to get
*
* @return object at given index
*/
public final int elementAt(int i)
{
return m_map[i];
}
/**
* Sets the component at the specified index of this vector to be the
* specified object. The previous component at that position is discarded.
*
* The index must be a value greater than or equal to 0 and less
* than the current size of the vector.
*
* @param value object to set
* @param index Index of where to set the object
*/
public final void setElementAt(int value, int index)
{
if (index >= m_mapSize)
{
int oldSize = m_mapSize;
m_mapSize += m_blocksize;
int newMap[] = new int[m_mapSize];
System.arraycopy(m_map, 0, newMap, 0, oldSize);
m_map = newMap;
}
m_map[index] = value;
}
/*
* Reset the array to the supplied size. No checking is done.
*
* @param size The size to trim to.
*/
public final void setToSize(int size) {
int newMap[] = new int[size];
System.arraycopy(m_map, 0, newMap, 0, m_map[m_lengthPos]);
m_mapSize = size;
m_map = newMap;
}
}