A writer for char strings : Writer « File Input Output « Java

1. Java
2. File Input Output
3. Writer

A writer for char strings

   


/* Copyright (c) 2001-2009, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 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.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS 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 HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR 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.
 */

/**
 * A writer for char strings.
 * 
 * @author Fred Toussi (fredt@users dot sourceforge.net)
 * @version 1.9.0
 * @since 1.9.0
 */

public class CharArrayWriter {

  protected char[] buffer;

  protected int count;

  public CharArrayWriter(char[] buffer) {
    this.buffer = buffer;
  }

  public void write(int c) {

    if (count == buffer.length) {
      ensureSize(count + 1);
    }

    buffer[count++] = (char) c;
  }

  void ensureSize(int size) {

    if (size <= buffer.length) {
      return;
    }

    int newSize = buffer.length;

    while (newSize < size) {
      newSize *= 2;
    }

    char[] newBuffer = new char[newSize];

    System.arraycopy(buffer, 0, newBuffer, 0, count);

    buffer = newBuffer;
  }

  public void write(String str, int off, int len) {

    ensureSize(count + len);
    str.getChars(off, off + len, buffer, count);

    count += len;
  }

  public void reset() {
    count = 0;
  }

  public void reset(char[] buffer) {
    count = 0;
    this.buffer = buffer;
  }

  public char[] toCharArray() {

    char[] newBuffer = new char[count];

    System.arraycopy(buffer, 0, newBuffer, 0, count);

    return (char[]) newBuffer;
  }

  public int size() {
    return count;
  }

  /**
   * Converts input data to a string.
   * 
   * @return the string.
   */
  public String toString() {
    return new String(buffer, 0, count);
  }
}

   
    
    
  

Related examples in the same category