content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * The Apache Software License, Version 1.1
   *
   *
   * Copyright (c) 1999-2002 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 "Xerces" 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, International
   * Business Machines, Inc., http://www.apache.org.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  
  package jaxp.sun.org.apache.xerces.internal.util;
  
  import jaxp.sun.org.apache.xerces.internal.xni.XMLString;
  
  /**
   * XMLString is a structure used to pass character arrays. However,
   * XMLStringBuffer is a buffer in which characters can be appended
   * and extends XMLString so that it can be passed to methods
   * expecting an XMLString object. This is a safe operation because
   * it is assumed that any callee will <strong>not</strong> modify
   * the contents of the XMLString structure.
   * <p>
   * The contents of the string are managed by the string buffer. As
   * characters are appended, the string buffer will grow as needed.
   * <p>
   * <strong>Note:</strong> Never set the <code>ch</code>,
   * <code>offset</code>, and <code>length</code> fields directly.
   * These fields are managed by the string buffer. In order to reset
   * the buffer, call <code>clear()</code>.
   *
   * @author Andy Clark, IBM
   * @author Eric Ye, IBM
   *
   */
  public class XMLStringBuffer
  extends XMLString {
  
      //
      // Constants
      //
  
  
      /** Default buffer size (32). */
      public static final int DEFAULT_SIZE = 32;
  
      //
      // Data
      //
  
      //
      // Constructors
      //
  
      /**
       *
       */
      public XMLStringBuffer() {
          this(DEFAULT_SIZE);
      } // <init>()
  
      /**
       *
       *
       * @param size
       */
      public XMLStringBuffer(int size) {
          ch = new char[size];
      } // <init>(int)
  
      /** Constructs a string buffer from a char. */
      public XMLStringBuffer(char c) {
          this(1);
          append(c);
      } // <init>(char)
  
      /** Constructs a string buffer from a String. */
      public XMLStringBuffer(String s) {
          this(s.length());
          append(s);
      } // <init>(String)
  
      /** Constructs a string buffer from the specified character array. */
      public XMLStringBuffer(char[] ch, int offset, int length) {
          this(length);
          append(ch, offset, length);
      } // <init>(char[],int,int)
  
      /** Constructs a string buffer from the specified XMLString. */
      public XMLStringBuffer(XMLString s) {
          this(s.length);
          append(s);
      } // <init>(XMLString)
  
      //
      // Public methods
      //
  
      /** Clears the string buffer. */
      public void clear() {
          offset = 0;
          length = 0;
      }
  
      /**
       * append
       *
       * @param c
       */
      public void append(char c) {
          if(this.length + 1 > this.ch.length){
              int newLength = this.ch.length * 2 ;
              if(newLength < this.ch.length + DEFAULT_SIZE){
                  newLength = this.ch.length + DEFAULT_SIZE;
              }
              char [] tmp = new char[newLength];
              System.arraycopy(this.ch, 0, tmp, 0, this.length);
              this.ch = tmp;
          }
          this.ch[this.length] = c ;
          this.length++;
      } // append(char)
  
      /**
       * append
       *
       * @param s
       */
      public void append(String s) {
          int length = s.length();
          if (this.length + length > this.ch.length) {
              int newLength = this.ch.length * 2 ;
              if(newLength < this.ch.length + length + DEFAULT_SIZE){
                  newLength = this.ch.length + length+ DEFAULT_SIZE;
              }
  
              char[] newch = new char[newLength];
              System.arraycopy(this.ch, 0, newch, 0, this.length);
              this.ch = newch;
          }
          s.getChars(0, length, this.ch, this.length);
          this.length += length;
      } // append(String)
  
      /**
       * append
       *
       * @param ch
       * @param offset
       * @param length
       */
      public void append(char[] ch, int offset, int length) {
          if (this.length + length > this.ch.length) {
              int newLength = this.ch.length * 2 ;
              if(newLength < this.ch.length + length + DEFAULT_SIZE){
                  newLength = this.ch.length + length + DEFAULT_SIZE;
              }
              char[] newch = new char[newLength];
              System.arraycopy(this.ch, 0, newch, 0, this.length);
              this.ch = newch;
          }
          //making the code more robust as it would handle null or 0 length data,
          //add the data only when it contains some thing
          if(ch != null && length > 0){
              System.arraycopy(ch, offset, this.ch, this.length, length);
              this.length += length;
          }
      } // append(char[],int,int)
  
      /**
       * append
       *
       * @param s
       */
      public void append(XMLString s) {
          append(s.ch, s.offset, s.length);
      } // append(XMLString)
  
  
  } // class XMLStringBuffer
  