- /*
- * Copyright 1999-2004 The Apache Software Foundation.
- *
- * Licensed 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: StringVector.java,v 1.7 2004/02/17 04:21:14 minchau Exp $
- */
- package com.sun.org.apache.xml.internal.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];
- }
- }