001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *      http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.oozie;
019
020import java.io.ByteArrayInputStream;
021import java.io.DataInputStream;
022import java.io.IOException;
023import org.apache.oozie.compression.CodecFactory;
024import org.apache.oozie.compression.CompressionCodec;
025
026/**
027 * BinaryBlob to maintain compress and uncompressed data
028 */
029public class BinaryBlob {
030
031    private byte[] rawBlob;
032    private byte[] bytes;
033
034    /**
035     * Construct a binaryblob
036     *
037     * @param byteArray
038     * @param isUncompressed - true if data is uncompressed
039     */
040    public BinaryBlob(byte[] byteArray, boolean isUncompressed) {
041        if (isUncompressed) {
042            this.bytes = byteArray;
043            this.rawBlob = null;
044        }
045        else {
046            this.rawBlob = byteArray;
047        }
048    }
049
050    /**
051     * Set bytes
052     *
053     * @param byteArray
054     */
055    public void setBytes(byte[] byteArray) {
056        this.bytes = byteArray;
057        this.rawBlob = null;
058    }
059
060    /**
061     * Returns a decompressed byte array
062     *
063     * @return byte array
064     */
065    public byte[] getBytes() {
066        if (bytes != null) {
067            return bytes;
068        }
069        if (rawBlob == null) {
070            return null;
071        }
072        try {
073            DataInputStream dais = new DataInputStream(new ByteArrayInputStream(rawBlob));
074            CompressionCodec codec = CodecFactory.getDeCompressionCodec(dais);
075            if (codec != null) {
076                bytes = codec.decompressToBytes(dais);
077            }
078            else {
079                bytes = rawBlob;
080            }
081            dais.close();
082        }
083        catch (IOException ex) {
084            throw new RuntimeException(ex);
085        }
086        rawBlob = null;
087        return bytes;
088
089    }
090
091    /**
092     * Returns a raw blob
093     *
094     * @return raw blob
095     */
096    public byte[] getRawBlob() {
097        if (rawBlob != null) {
098            return rawBlob;
099        }
100        if (bytes == null) {
101            return null;
102        }
103        if (CodecFactory.isCompressionEnabled()) {
104            byte[] headerBytes = CodecFactory.getHeaderBytes();
105            try {
106                rawBlob = CodecFactory.getCompressionCodec().compressBytes(headerBytes, bytes);
107            }
108            catch (IOException ex) {
109                throw new RuntimeException(ex);
110            }
111        }
112        else {
113            rawBlob = bytes;
114        }
115        return rawBlob;
116    }
117
118}