lightning-core/src/main/java/org/apache/directmemory/lightning/internal/io/WriterOutputStream.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.directmemory.lightning.internal.io;

import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;

/* ------------------------------------------------------------ */
/**
 * Wrap a Writer as an OutputStream. When all you have is a Writer and only an OutputStream will do. Try not to use this
 * as it indicates that your design is a dogs breakfast (JSP made me write it).
 * 
 * @author Greg Wilkins (gregw) - Mort Bay Consulting Pty. Ltd.
 */
public class WriterOutputStream
    extends OutputStream
{

    protected Writer _writer;

    protected String _encoding;

    private byte[] _buf = new byte[1];

    /* ------------------------------------------------------------ */
    public WriterOutputStream( Writer writer, String encoding )
    {
        _writer = writer;
        _encoding = encoding;
    }

    /* ------------------------------------------------------------ */
    public WriterOutputStream( Writer writer )
    {
        _writer = writer;
    }

    /* ------------------------------------------------------------ */
    @Override
    public void close()
        throws IOException
    {
        _writer.close();
        _writer = null;
        _encoding = null;
    }

    /* ------------------------------------------------------------ */
    @Override
    public void flush()
        throws IOException
    {
        _writer.flush();
    }

    /* ------------------------------------------------------------ */
    @Override
    public void write( byte[] b )
        throws IOException
    {
        if ( _encoding == null )
            _writer.write( new String( b ) );
        else
            _writer.write( new String( b, _encoding ) );
    }

    /* ------------------------------------------------------------ */
    @Override
    public void write( byte[] b, int off, int len )
        throws IOException
    {
        if ( _encoding == null )
            _writer.write( new String( b, off, len ) );
        else
            _writer.write( new String( b, off, len, _encoding ) );
    }

    /* ------------------------------------------------------------ */
    @Override
    public synchronized void write( int b )
        throws IOException
    {
        _buf[0] = (byte) b;
        write( _buf );
    }
}