| /* |
| * 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. |
| */ |
| /* |
| * $Id$ |
| */ |
| package org.apache.xml.utils; |
| |
| /** |
| * 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 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; |
| } |
| } |