/*
 * 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.sshd.common.channel;

import java.io.IOException;

import org.apache.sshd.common.io.AbstractIoWriteFuture;
import org.apache.sshd.common.io.IoOutputStream;
import org.apache.sshd.common.io.IoWriteFuture;
import org.apache.sshd.common.util.buffer.Buffer;
import org.apache.sshd.common.util.closeable.AbstractCloseable;
import org.apache.sshd.common.util.io.IoUtils;

/**
 * An implementation of {@link IoOutputStream} using a synchronous {@link ChannelOutputStream}.
 *
 * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
 */
public class SimpleIoOutputStream extends AbstractCloseable implements IoOutputStream {

    protected final ChannelOutputStream os;

    public SimpleIoOutputStream(ChannelOutputStream os) {
        this.os = os;
    }

    @Override
    protected void doCloseImmediately() {
        IoUtils.closeQuietly(os);
        super.doCloseImmediately();
    }

    @Override
    public IoWriteFuture writeBuffer(Buffer buffer) throws IOException {
        os.write(buffer.array(), buffer.rpos(), buffer.available());
        os.flush();
        DefaultIoWriteFuture f = new DefaultIoWriteFuture(this, null);
        f.setValue(true);
        return f;
    }

    protected static class DefaultIoWriteFuture extends AbstractIoWriteFuture {

        public DefaultIoWriteFuture(Object id, Object lock) {
            super(id, lock);
        }

    }

}
