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.Flushable; 024 import java.io.IOException; 025 import java.io.Writer; 026 027 /** 028 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> 029 * @version $Revision$ 030 */ 031 public class AppendableWriter extends Writer { 032 033 /** . */ 034 private final Appendable out; 035 036 /** . */ 037 private boolean closed; 038 039 public AppendableWriter(Appendable out) { 040 this.out = out; 041 } 042 043 @Override 044 public void write(char[] cbuf, int off, int len) throws IOException { 045 if (closed) { 046 throw new IOException("Already closed"); 047 } 048 int end = off + len; 049 while (off < end) { 050 out.append(cbuf[off++]); 051 } 052 } 053 054 @Override 055 public void flush() throws IOException { 056 if (closed) { 057 throw new IOException("Already closed"); 058 } 059 if (out instanceof Flushable) { 060 ((Flushable)out).flush(); 061 } 062 } 063 064 @Override 065 public void close() throws IOException { 066 if (!closed) { 067 closed = true; 068 if (out instanceof Closeable) { 069 ((Closeable)out).close(); 070 } 071 } 072 } 073 }