/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
*
* This decoder is optimized to transfer data directly from * a {@link FileChannel} to the underlying I/O session's channel whenever * possible avoiding intermediate buffering in the session buffer. * * @since 4.0 */ @NotThreadSafe public class IdentityEncoder extends AbstractContentEncoder implements FileContentEncoder { public IdentityEncoder( final WritableByteChannel channel, final SessionOutputBuffer buffer, final HttpTransportMetricsImpl metrics) { super(channel, buffer, metrics); } public int write(final ByteBuffer src) throws IOException { if (src == null) { return 0; } assertNotCompleted(); int bytesWritten = this.channel.write(src); if (bytesWritten > 0) { this.metrics.incrementBytesTransferred(bytesWritten); } return bytesWritten; } public long transfer( final FileChannel src, long position, long count) throws IOException { if (src == null) { return 0; } assertNotCompleted(); long bytesWritten = src.transferTo(position, count, this.channel); if (bytesWritten > 0) { this.metrics.incrementBytesTransferred(bytesWritten); } return bytesWritten; } @Override public String toString() { StringBuilder buffer = new StringBuilder(); buffer.append("[identity; completed: "); buffer.append(this.completed); buffer.append("]"); return buffer.toString(); } }