| 1 | /* |
| 2 | * Copyright 2006-2013 the original author or authors. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.springframework.batch.core.repository.dao; |
| 18 | |
| 19 | import java.io.BufferedReader; |
| 20 | import java.io.IOException; |
| 21 | import java.io.InputStream; |
| 22 | import java.io.InputStreamReader; |
| 23 | import java.io.OutputStream; |
| 24 | |
| 25 | import org.springframework.batch.core.repository.ExecutionContextSerializer; |
| 26 | import org.springframework.beans.factory.InitializingBean; |
| 27 | import org.springframework.core.serializer.Deserializer; |
| 28 | import org.springframework.core.serializer.Serializer; |
| 29 | import org.springframework.util.Assert; |
| 30 | |
| 31 | import com.thoughtworks.xstream.XStream; |
| 32 | import com.thoughtworks.xstream.converters.reflection.ReflectionProvider; |
| 33 | import com.thoughtworks.xstream.io.HierarchicalStreamDriver; |
| 34 | import com.thoughtworks.xstream.io.json.JettisonMappedXmlDriver; |
| 35 | |
| 36 | /** |
| 37 | * Implementation that uses XStream and Jettison to provide serialization. |
| 38 | * |
| 39 | * @author Thomas Risberg |
| 40 | * @author Michael Minella |
| 41 | * @since 2.0 |
| 42 | * @see ExecutionContextSerializer |
| 43 | */ |
| 44 | public class XStreamExecutionContextStringSerializer implements ExecutionContextSerializer, InitializingBean { |
| 45 | |
| 46 | private ReflectionProvider reflectionProvider = null; |
| 47 | |
| 48 | private HierarchicalStreamDriver hierarchicalStreamDriver; |
| 49 | |
| 50 | private XStream xstream; |
| 51 | |
| 52 | public void setReflectionProvider(ReflectionProvider reflectionProvider) { |
| 53 | this.reflectionProvider = reflectionProvider; |
| 54 | } |
| 55 | |
| 56 | public void setHierarchicalStreamDriver(HierarchicalStreamDriver hierarchicalStreamDriver) { |
| 57 | this.hierarchicalStreamDriver = hierarchicalStreamDriver; |
| 58 | } |
| 59 | |
| 60 | @Override |
| 61 | public void afterPropertiesSet() throws Exception { |
| 62 | init(); |
| 63 | } |
| 64 | |
| 65 | public synchronized void init() throws Exception { |
| 66 | if (hierarchicalStreamDriver == null) { |
| 67 | this.hierarchicalStreamDriver = new JettisonMappedXmlDriver(); |
| 68 | } |
| 69 | if (reflectionProvider == null) { |
| 70 | xstream = new XStream(hierarchicalStreamDriver); |
| 71 | } |
| 72 | else { |
| 73 | xstream = new XStream(reflectionProvider, hierarchicalStreamDriver); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Serializes the passed execution context to the supplied OutputStream. |
| 79 | * |
| 80 | * @param context |
| 81 | * @param out |
| 82 | * @see Serializer#serialize(Object, OutputStream) |
| 83 | */ |
| 84 | @Override |
| 85 | public void serialize(Object context, OutputStream out) throws IOException { |
| 86 | Assert.notNull(context); |
| 87 | Assert.notNull(out); |
| 88 | |
| 89 | out.write(xstream.toXML(context).getBytes()); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Deserializes the supplied input stream into a new execution context. |
| 94 | * |
| 95 | * @param in |
| 96 | * @return a reconstructed execution context |
| 97 | * @see Deserializer#deserialize(InputStream) |
| 98 | */ |
| 99 | @Override |
| 100 | public Object deserialize(InputStream in) throws IOException { |
| 101 | BufferedReader br = new BufferedReader(new InputStreamReader(in)); |
| 102 | |
| 103 | StringBuilder sb = new StringBuilder(); |
| 104 | |
| 105 | String line; |
| 106 | while ((line = br.readLine()) != null) { |
| 107 | sb.append(line); |
| 108 | } |
| 109 | |
| 110 | return xstream.fromXML(sb.toString()); |
| 111 | } |
| 112 | } |