| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999-2003 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; |
| |
| /** |
| * A very simple table that stores a list of strings, optimized |
| * for small lists. |
| * @xsl.usage internal |
| */ |
| public class StringVector implements java.io.Serializable |
| { |
| |
| /** @serial Size of blocks to allocate */ |
| protected int m_blocksize; |
| |
| /** @serial Array of strings this contains */ |
| protected String m_map[]; |
| |
| /** @serial Number of strings this contains */ |
| protected int m_firstFree = 0; |
| |
| /** @serial Size of the array */ |
| protected int m_mapSize; |
| |
| /** |
| * Default constructor. Note that the default |
| * block size is very small, for small lists. |
| */ |
| public StringVector() |
| { |
| |
| m_blocksize = 8; |
| m_mapSize = m_blocksize; |
| m_map = new String[m_blocksize]; |
| } |
| |
| /** |
| * Construct a StringVector, using the given block size. |
| * |
| * @param blocksize Size of the blocks to allocate |
| */ |
| public StringVector(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 int getLength() |
| { |
| return m_firstFree; |
| } |
| |
| /** |
| * Get the length of the list. |
| * |
| * @return Number of strings in the list |
| */ |
| public final int size() |
| { |
| return m_firstFree; |
| } |
| |
| /** |
| * Append a string onto the vector. |
| * |
| * @param value Sting to add to the vector |
| */ |
| public final void addElement(String 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; |
| } |
| |
| m_map[m_firstFree] = value; |
| |
| m_firstFree++; |
| } |
| |
| /** |
| * Get the nth element. |
| * |
| * @param i Index of string to find |
| * |
| * @return String at given index |
| */ |
| public final String elementAt(int i) |
| { |
| return m_map[i]; |
| } |
| |
| /** |
| * Tell if the table contains the given string. |
| * |
| * @param s String to look for |
| * |
| * @return True if the string is in this table |
| */ |
| public final boolean contains(String s) |
| { |
| |
| if (null == s) |
| return false; |
| |
| for (int i = 0; i < m_firstFree; i++) |
| { |
| if (m_map[i].equals(s)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Tell if the table contains the given string. Ignore case. |
| * |
| * @param s String to find |
| * |
| * @return True if the String is in this vector |
| */ |
| public final boolean containsIgnoreCase(String s) |
| { |
| |
| if (null == s) |
| return false; |
| |
| for (int i = 0; i < m_firstFree; i++) |
| { |
| if (m_map[i].equalsIgnoreCase(s)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Tell if the table contains the given string. |
| * |
| * @param s String to push into the vector |
| */ |
| public final void push(String s) |
| { |
| |
| 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; |
| } |
| |
| m_map[m_firstFree] = s; |
| |
| m_firstFree++; |
| } |
| |
| /** |
| * Pop the tail of this vector. |
| * |
| * @return The String last added to this vector or null not found. |
| * The string is removed from the vector. |
| */ |
| public final String pop() |
| { |
| |
| if (m_firstFree <= 0) |
| return null; |
| |
| m_firstFree--; |
| |
| String s = m_map[m_firstFree]; |
| |
| m_map[m_firstFree] = null; |
| |
| return s; |
| } |
| |
| /** |
| * Get the string at the tail of this vector without popping. |
| * |
| * @return The string at the tail of this vector. |
| */ |
| public final String peek() |
| { |
| return (m_firstFree <= 0) ? null : m_map[m_firstFree - 1]; |
| } |
| } |