/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999 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 "Xalan" and "Apache Software Foundation" 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",
* 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 and was
* originally based on software copyright (c) 1999, Lotus
* Development Corporation., http://www.lotus.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xml.utils;
/**
* <meta name="usage" content="internal"/>
* A very simple table that stores a list of int.
*/
public class IntVector
{
/** Size of blocks to allocate */
protected int m_blocksize;
/** Array of ints */
public int m_map[]; // expose to package for direct access.
/** Number of ints in array */
protected int m_firstFree = 0;
/** Size of array */
protected int m_mapSize;
/**
* Default constructor. Note that the default
* block size is very small, for small lists.
*/
public IntVector()
{
m_blocksize = 32;
m_mapSize = m_blocksize;
m_map = new int[m_blocksize];
}
/**
* Construct a IntVector, using the given block size.
*
* @param blocksize Size of block to allocate
*/
public IntVector(int blocksize)
{
m_blocksize = blocksize;
m_mapSize = blocksize;
m_map = new int[blocksize];
}
/**
* Construct a IntVector, using the given block size.
*
* @param blocksize Size of block to allocate
*/
public IntVector(int blocksize, int increaseSize)
{
m_blocksize = increaseSize;
m_mapSize = blocksize;
m_map = new int[blocksize];
}
/**
* Get the length of the list.
*
* @return length of the list
*/
public final int size()
{
return m_firstFree;
}
/**
* Get the length of the list.
*
* @return length of the list
*/
public final void setSize(int sz)
{
m_firstFree = sz;
}
/**
* Append a int onto the vector.
*
* @param value Int to add to the list
*/
public final void addElement(int value)
{
if ((m_firstFree + 1) >= m_mapSize)
{
m_mapSize += m_blocksize;
int newMap[] = new int[m_mapSize];
System.arraycopy(m_map, 0, newMap, 0, m_firstFree + 1);
m_map = newMap;
}
m_map[m_firstFree] = value;
m_firstFree++;
}
/**
* Append several int values onto the vector.
*
* @param value Int to add to the list
*/
public final void addElements(int value, int numberOfElements)
{
if ((m_firstFree + numberOfElements) >= m_mapSize)
{
m_mapSize += (m_blocksize+numberOfElements);
int newMap[] = new int[m_mapSize];
System.arraycopy(m_map, 0, newMap, 0, m_firstFree + 1);
m_map = newMap;
}
for (int i = 0; i < numberOfElements; i++)
{
m_map[m_firstFree] = value;
m_firstFree++;
}
}
/**
* Append several slots onto the vector, but do not set the values.
*
* @param value Int to add to the list
*/
public final void addElements(int numberOfElements)
{
if ((m_firstFree + numberOfElements) >= m_mapSize)
{
m_mapSize += (m_blocksize+numberOfElements);
int newMap[] = new int[m_mapSize];
System.arraycopy(m_map, 0, newMap, 0, m_firstFree + 1);
m_map = newMap;
}
m_firstFree += numberOfElements;
}
/**
* Inserts the specified node in this vector at the specified index.
* Each component in this vector with an index greater or equal to
* the specified index is shifted upward to have an index one greater
* than the value it had previously.
*
* @param value Int to insert
* @param at Index of where to insert
*/
public final void insertElementAt(int value, int at)
{
if ((m_firstFree + 1) >= m_mapSize)
{
m_mapSize += m_blocksize;
int newMap[] = new int[m_mapSize];
System.arraycopy(m_map, 0, newMap, 0, m_firstFree + 1);
m_map = newMap;
}
if (at <= (m_firstFree - 1))
{
System.arraycopy(m_map, at, m_map, at + 1, m_firstFree - at);
}
m_map[at] = value;
m_firstFree++;
}
/**
* Inserts the specified node in this vector at the specified index.
* Each component in this vector with an index greater or equal to
* the specified index is shifted upward to have an index one greater
* than the value it had previously.
*/
public final void removeAllElements()
{
for (int i = 0; i < m_firstFree; i++)
{
m_map[i] = java.lang.Integer.MIN_VALUE;
}
m_firstFree = 0;
}
/**
* Removes the first occurrence of the argument from this vector.
* If the object is found in this vector, each component in the vector
* with an index greater or equal to the object's index is shifted
* downward to have an index one smaller than the value it had
* previously.
*
* @param s Int to remove from array
*
* @return True if the int was removed, false if it was not found
*/
public final boolean removeElement(int s)
{
for (int i = 0; i < m_firstFree; i++)
{
if (m_map[i] == s)
{
if ((i + 1) < m_firstFree)
System.arraycopy(m_map, i + 1, m_map, i - 1, m_firstFree - i);
else
m_map[i] = java.lang.Integer.MIN_VALUE;
m_firstFree--;
return true;
}
}
return false;
}
/**
* Deletes the component at the specified index. Each component in
* this vector with an index greater or equal to the specified
* index is shifted downward to have an index one smaller than
* the value it had previously.
*
* @param i index of where to remove and int
*/
public final void removeElementAt(int i)
{
if (i > m_firstFree)
System.arraycopy(m_map, i + 1, m_map, i, m_firstFree);
else
m_map[i] = java.lang.Integer.MIN_VALUE;
m_firstFree--;
}
/**
* 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 node object to set
* @param index Index of where to set the object
*/
public final void setElementAt(int value, int index)
{
m_map[index] = value;
}
/**
* 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];
}
/**
* Tell if the table contains the given node.
*
* @param s object to look for
*
* @return true if the object is in the list
*/
public final boolean contains(int s)
{
for (int i = 0; i < m_firstFree; i++)
{
if (m_map[i] == s)
return true;
}
return false;
}
/**
* Searches for the first occurence of the given argument,
* beginning the search at index, and testing for equality
* using the equals method.
*
* @param elem object to look for
* @param index Index of where to begin search
* @return the index of the first occurrence of the object
* argument in this vector at position index or later in the
* vector; returns -1 if the object is not found.
*/
public final int indexOf(int elem, int index)
{
for (int i = index; i < m_firstFree; i++)
{
if (m_map[i] == elem)
return i;
}
return java.lang.Integer.MIN_VALUE;
}
/**
* Searches for the first occurence of the given argument,
* beginning the search at index, and testing for equality
* using the equals method.
*
* @param elem object to look for
* @return the index of the first occurrence of the object
* argument in this vector at position index or later in the
* vector; returns -1 if the object is not found.
*/
public final int indexOf(int elem)
{
for (int i = 0; i < m_firstFree; i++)
{
if (m_map[i] == elem)
return i;
}
return java.lang.Integer.MIN_VALUE;
}
/**
* Searches for the first occurence of the given argument,
* beginning the search at index, and testing for equality
* using the equals method.
*
* @param elem Object to look for
* @return the index of the first occurrence of the object
* argument in this vector at position index or later in the
* vector; returns -1 if the object is not found.
*/
public final int lastIndexOf(int elem)
{
for (int i = (m_firstFree - 1); i >= 0; i--)
{
if (m_map[i] == elem)
return i;
}
return java.lang.Integer.MIN_VALUE;
}
}