Mega Code Archive
Lookup table that stores a list of strings
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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: StringToIntTable.java 468655 2006-10-28 07:12:06Z minchau $
*/
/**
* A very simple lookup table that stores a list of strings, the even
* number strings being keys, and the odd number strings being values.
* @xsl.usage internal
*/
public class StringToIntTable
{
public static final int INVALID_KEY = -10000;
/** Block size to allocate */
private int m_blocksize;
/** Array of strings this table points to. Associated with ints
* in m_values */
private String m_map[];
/** Array of ints this table points. Associated with strings from
* m_map. */
private int m_values[];
/** Number of ints in the table */
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 StringToIntTable()
{
m_blocksize = 8;
m_mapSize = m_blocksize;
m_map = new String[m_blocksize];
m_values = new int[m_blocksize];
}
/**
* Construct a StringToIntTable, using the given block size.
*
* @param blocksize Size of block to allocate
*/
public StringToIntTable(int blocksize)
{
m_blocksize = blocksize;
m_mapSize = blocksize;
m_map = new String[blocksize];
m_values = new int[m_blocksize];
}
/**
* Get the length of the list.
*
* @return the length of the list
*/
public final int getLength()
{
return m_firstFree;
}
/**
* Append a string onto the vector.
*
* @param key String to append
* @param value The int value of the string
*/
public final void put(String key, int value)
{
if ((m_firstFree + 1) >= 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;
int newValues[] = new int[m_mapSize];
System.arraycopy(m_values, 0, newValues, 0, m_firstFree + 1);
m_values = newValues;
}
m_map[m_firstFree] = key;
m_values[m_firstFree] = value;
m_firstFree++;
}
/**
* Tell if the table contains the given string.
*
* @param key String to look for
*
* @return The String's int value
*
*/
public final int get(String key)
{
for (int i = 0; i < m_firstFree; i++)
{
if (m_map[i].equals(key))
return m_values[i];
}
return INVALID_KEY;
}
/**
* Tell if the table contains the given string. Ignore case.
*
* @param key String to look for
*
* @return The string's int value
*/
public final int getIgnoreCase(String key)
{
if (null == key)
return INVALID_KEY;
for (int i = 0; i < m_firstFree; i++)
{
if (m_map[i].equalsIgnoreCase(key))
return m_values[i];
}
return INVALID_KEY;
}
/**
* Tell if the table contains the given string.
*
* @param key String to look for
*
* @return True if the string is in the table
*/
public final boolean contains(String key)
{
for (int i = 0; i < m_firstFree; i++)
{
if (m_map[i].equals(key))
return true;
}
return false;
}
/**
* Return array of keys in the table.
*
* @return Array of strings
*/
public final String[] keys()
{
String [] keysArr = new String[m_firstFree];
for (int i = 0; i < m_firstFree; i++)
{
keysArr[i] = m_map[i];
}
return keysArr;
}
}
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