001    /**
002     *  Copyright (C) 20010, Progress Software Corporation and/or its
003     * subsidiaries or affiliates.  All rights reserved.
004     *
005     * Licensed under the Apache License, Version 2.0 (the "License");
006     * you may not use this file except in compliance with the License.
007     * You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.fusesource.hawtbuf.proto;
018    
019    import org.fusesource.hawtbuf.codec.VariableCodec;
020    
021    import java.io.*;
022    
023    /**
024     * <p>
025     * Implements the Codec interface for PBMessages type which
026     * encode/decodes unframed messages.
027     * </p>
028     *
029     * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
030     */
031    public class PBMessageUnframedCodec<T extends MessageBuffer> extends VariableCodec<T> {
032    
033        final private PBMessageFactory<?, ? extends T> factory;
034    
035        public PBMessageUnframedCodec(PBMessageFactory<?, ? extends T> factory) {
036            this.factory = factory;
037        }
038    
039        public T decode(DataInput dataIn) throws IOException {
040            return (T)factory.parseUnframed((InputStream) dataIn).freeze();
041        }
042    
043        public void encode(T value, DataOutput dataOut) throws IOException {
044            value.writeUnframed((OutputStream) dataOut);
045        }
046    
047        @Override
048        public boolean isEstimatedSizeSupported() {
049            return true;
050        }
051    
052        public int estimatedSize(T value) {
053            return value.serializedSizeUnframed();
054        }
055    
056        @Override
057        public boolean isDeepCopySupported() {
058            return true;
059        }
060    
061        @Override
062        public T deepCopy(T value) {
063            return (T) value;
064        }
065    }