Java tutorial
/* 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); } }