| /** |
| * 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.oozie; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| |
| import org.apache.oozie.compression.CodecFactory; |
| import org.apache.oozie.compression.CompressionCodec; |
| import org.apache.oozie.util.ByteArrayUtils; |
| import org.apache.oozie.util.StringUtils; |
| |
| /** |
| * StringBlob to maintain compress and uncompressed data |
| */ |
| public class StringBlob { |
| |
| private byte[] rawBlob; |
| private String string; |
| |
| /** |
| * Construct string blob from compressed byte array |
| * |
| * @param byteArray the byte array |
| */ |
| public StringBlob(byte[] byteArray) { |
| this.rawBlob = ByteArrayUtils.weakIntern(byteArray); |
| } |
| |
| /** |
| * Construct StringBlob with uncompressed string |
| * |
| * @param inputString the string |
| */ |
| public StringBlob(String inputString) { |
| this.string = StringUtils.intern(inputString); |
| this.rawBlob = null; |
| } |
| |
| /** |
| * Set string |
| * |
| * @param str the string |
| */ |
| public void setString(String str) { |
| this.string = StringUtils.intern(str); |
| this.rawBlob = null; |
| } |
| |
| /** |
| * Get uncompressed string |
| * |
| * @return uncompressed string |
| */ |
| public String getString() { |
| if (string != null) { |
| return string; |
| } |
| if (rawBlob == null) { |
| return null; |
| } |
| try { |
| DataInputStream dais = new DataInputStream(new ByteArrayInputStream(rawBlob)); |
| CompressionCodec codec = CodecFactory.getDeCompressionCodec(dais); |
| if (codec != null) { |
| string = StringUtils.intern(codec.decompressToString(dais)); |
| } |
| else { |
| string = StringUtils.intern((new String(rawBlob, CodecFactory.UTF_8_ENCODING))); |
| } |
| dais.close(); |
| |
| } |
| catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } |
| rawBlob = null; |
| return string; |
| } |
| |
| /** |
| * Get raw blob |
| * |
| * @return raw blob |
| */ |
| public byte[] getRawBlob() { |
| if (rawBlob != null) { |
| return rawBlob; |
| } |
| if (string == null) { |
| return null; |
| } |
| if (CodecFactory.isCompressionEnabled()) { |
| byte[] bytes = CodecFactory.getHeaderBytes(); |
| try { |
| rawBlob = ByteArrayUtils.weakIntern(CodecFactory.getCompressionCodec().compressString(bytes, string)); |
| } |
| catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| else { |
| rawBlob = ByteArrayUtils.weakIntern(string.getBytes(StandardCharsets.UTF_8)); |
| } |
| return rawBlob; |
| } |
| |
| } |