001/*
002 * ====================================================================
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *   http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied.  See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 * ====================================================================
020 *
021 * This software consists of voluntary contributions made by many
022 * individuals on behalf of the Apache Software Foundation.  For more
023 * information on the Apache Software Foundation, please see
024 * <http://www.apache.org/>.
025 *
026 */
027
028package org.apache.http.nio;
029
030import java.io.IOException;
031import java.nio.ByteBuffer;
032import java.nio.channels.ReadableByteChannel;
033
034/**
035 * A {@link ReadableByteChannel} that delegates to a {@link ContentDecoder}.
036 * Attempts to close this channel are ignored, and {@link #isOpen} always
037 * returns {@code true}.
038 *
039 * @since 4.0
040 */
041public class ContentDecoderChannel implements ReadableByteChannel {
042
043    private final ContentDecoder decoder;
044
045    public ContentDecoderChannel(final ContentDecoder decoder) {
046        this.decoder = decoder;
047    }
048
049    @Override
050    public int read(final ByteBuffer dst) throws IOException {
051        return decoder.read(dst);
052    }
053
054    @Override
055    public void close() {}
056
057    @Override
058    public boolean isOpen() {
059        return true;
060    }
061
062}