/*
* 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 lookup table that stores a list of strings, the even
* number strings being keys, and the odd number strings being values.
*/
public class StringToStringTable
{
/** Size of blocks to allocate */
private int m_blocksize;
/** Array of strings this contains */
private String m_map[];
/** Number of strings this contains */
private int m_firstFree = 0;
/** Size of this table */
private int m_mapSize;
/**
* Default constructor. Note that the default
* block size is very small, for small lists.
*/
public StringToStringTable()
{
m_blocksize = 16;
m_mapSize = m_blocksize;
m_map = new String[m_blocksize];
}
/**
* Construct a StringToStringTable, using the given block size.
*
* @param blocksize Size of blocks to allocate
*/
public StringToStringTable(int blocksize)
{
m_blocksize = blocksize;
m_mapSize = blocksize;
m_map = new String[blocksize];
}
/**
* Get the length of the list.
*
* @return Number of strings in the list
*/
public final int getLength()
{
return m_firstFree;
}
/**
* Append a string onto the vector.
* The strings go to the even locations in the array
* and the values in the odd.
*
* @param key String to add to the list
* @param value Value of the string
*/
public final void put(String key, String value)
{
if ((m_firstFree + 2) >= m_mapSize)
{
m_mapSize += m_blocksize;
String newMap[] = new String[m_mapSize];
System.arraycopy(m_map, 0, newMap, 0, m_firstFree + 1);
m_map = newMap;
}
m_map[m_firstFree] = key;
m_firstFree++;
m_map[m_firstFree] = value;
m_firstFree++;
}
/**
* Tell if the table contains the given string.
*
* @param key String to look up
*
* @return return the value of the string or null if not found.
*/
public final String get(String key)
{
for (int i = 0; i < m_firstFree; i += 2)
{
if (m_map[i].equals(key))
return m_map[i + 1];
}
return null;
}
/**
* Remove the given string and its value from this table.
*
* @param key String to remove from the table
*/
public final void remove(String key)
{
for (int i = 0; i < m_firstFree; i += 2)
{
if (m_map[i].equals(key))
{
if ((i + 2) < m_firstFree)
System.arraycopy(m_map, i + 2, m_map, i, m_firstFree - (i + 2));
m_firstFree -= 2;
m_map[m_firstFree] = null;
m_map[m_firstFree + 1] = null;
break;
}
}
}
/**
* Tell if the table contains the given string. Ignore case
*
* @param key String to look up
*
* @return The value of the string or null if not found
*/
public final String getIgnoreCase(String key)
{
if (null == key)
return null;
for (int i = 0; i < m_firstFree; i += 2)
{
if (m_map[i].equalsIgnoreCase(key))
return m_map[i + 1];
}
return null;
}
/**
* Tell if the table contains the given string in the value.
*
* @param val Value of the string to look up
*
* @return the string associated with the given value or null if not found
*/
public final String getByValue(String val)
{
for (int i = 1; i < m_firstFree; i += 2)
{
if (m_map[i].equals(val))
return m_map[i - 1];
}
return null;
}
/**
* Get the nth element.
*
* @param i index of the string to look up.
*
* @return The string at the given index.
*/
public final String elementAt(int i)
{
return m_map[i];
}
/**
* Tell if the table contains the given string.
*
* @param key String to look up
*
* @return True if the given string is in this table
*/
public final boolean contains(String key)
{
for (int i = 0; i < m_firstFree; i += 2)
{
if (m_map[i].equals(key))
return true;
}
return false;
}
/**
* Tell if the table contains the given string.
*
* @param val value to look up
*
* @return True if the given value is in the table.
*/
public final boolean containsValue(String val)
{
for (int i = 1; i < m_firstFree; i += 2)
{
if (m_map[i].equals(val))
return true;
}
return false;
}
}