001 /* 002 * Copyright (C) 2010 eXo Platform SAS. 003 * 004 * This is free software; you can redistribute it and/or modify it 005 * under the terms of the GNU Lesser General Public License as 006 * published by the Free Software Foundation; either version 2.1 of 007 * the License, or (at your option) any later version. 008 * 009 * This software is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * You should have received a copy of the GNU Lesser General Public 015 * License along with this software; if not, write to the Free 016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 018 */ 019 020 package org.crsh.util; 021 022 import java.io.Closeable; 023 import java.io.IOException; 024 import java.io.Writer; 025 026 /** 027 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> 028 * @version $Revision$ 029 */ 030 public class AppendableWriter extends Writer { 031 032 /** . */ 033 private final Appendable out; 034 035 /** . */ 036 private boolean closed; 037 038 public AppendableWriter(Appendable out) { 039 this.out = out; 040 } 041 042 @Override 043 public void write(char[] cbuf, int off, int len) throws IOException { 044 if (closed) { 045 throw new IOException("Already closed"); 046 } 047 int end = off + len; 048 while (off < end) { 049 out.append(cbuf[off++]); 050 } 051 } 052 053 @Override 054 public void flush() throws IOException { 055 if (closed) { 056 throw new IOException("Already closed"); 057 } 058 } 059 060 @Override 061 public void close() throws IOException { 062 if (!closed) { 063 closed = true; 064 if (out instanceof Closeable) { 065 ((Closeable)out).close(); 066 } 067 } 068 } 069 }