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16 package org.kuali.rice.krad.service.impl;
17
18 import com.thoughtworks.xstream.XStream;
19 import com.thoughtworks.xstream.converters.MarshallingContext;
20 import com.thoughtworks.xstream.converters.UnmarshallingContext;
21 import com.thoughtworks.xstream.converters.collections.CollectionConverter;
22 import com.thoughtworks.xstream.converters.reflection.ObjectAccessException;
23 import com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider;
24 import com.thoughtworks.xstream.converters.reflection.ReflectionConverter;
25 import com.thoughtworks.xstream.converters.reflection.ReflectionProvider;
26 import com.thoughtworks.xstream.io.HierarchicalStreamReader;
27 import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
28 import com.thoughtworks.xstream.mapper.Mapper;
29 import org.apache.ojb.broker.core.proxy.ListProxyDefaultImpl;
30 import org.apache.ojb.broker.core.proxy.ProxyHelper;
31 import org.kuali.rice.krad.document.Document;
32 import org.kuali.rice.krad.service.DocumentSerializerService;
33 import org.kuali.rice.krad.service.PersistenceService;
34 import org.kuali.rice.krad.service.SerializerService;
35 import org.kuali.rice.krad.service.XmlObjectSerializerService;
36 import org.kuali.rice.krad.util.DateTimeConverter;
37 import org.kuali.rice.krad.util.documentserializer.AlwaysTruePropertySerializibilityEvaluator;
38 import org.kuali.rice.krad.util.documentserializer.PropertySerializabilityEvaluator;
39 import org.kuali.rice.krad.util.documentserializer.PropertyType;
40 import org.kuali.rice.krad.util.documentserializer.SerializationState;
41 import org.springframework.util.AutoPopulatingList;
42
43 import java.lang.reflect.Field;
44 import java.util.ArrayList;
45 import java.util.Iterator;
46 import java.util.List;
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55 public abstract class SerializerServiceBase implements SerializerService {
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57
58 protected PersistenceService persistenceService;
59 protected XmlObjectSerializerService xmlObjectSerializerService;
60
61 protected XStream xstream;
62 protected ThreadLocal<SerializationState> serializationStates;
63 protected ThreadLocal<PropertySerializabilityEvaluator> evaluators;
64
65 public SerializerServiceBase() {
66 serializationStates = new ThreadLocal<SerializationState>();
67 evaluators = new ThreadLocal<PropertySerializabilityEvaluator>();
68
69 xstream = new XStream(new ProxyAndStateAwareJavaReflectionProvider());
70 xstream.registerConverter(new ProxyConverter(xstream.getMapper(), xstream.getReflectionProvider() ));
71 xstream.addDefaultImplementation(ArrayList.class, ListProxyDefaultImpl.class);
72 xstream.addDefaultImplementation(AutoPopulatingList.class, ListProxyDefaultImpl.class);
73 xstream.registerConverter(new AutoPopulatingListConverter(xstream.getMapper()));
74 xstream.registerConverter(new DateTimeConverter());
75 }
76
77 public class ProxyConverter extends ReflectionConverter {
78 public ProxyConverter(Mapper mapper, ReflectionProvider reflectionProvider) {
79 super(mapper, reflectionProvider);
80 }
81 public boolean canConvert(Class clazz) {
82 return clazz.getName().contains("CGLIB") || clazz.getName().equals("org.apache.ojb.broker.core.proxy.ListProxyDefaultImpl");
83 }
84
85 public void marshal(Object obj, HierarchicalStreamWriter writer, MarshallingContext context) {
86 if (obj instanceof ListProxyDefaultImpl) {
87 List copiedList = new ArrayList();
88 List proxiedList = (List) obj;
89 for (Iterator iter = proxiedList.iterator(); iter.hasNext();) {
90 copiedList.add(iter.next());
91 }
92 context.convertAnother( copiedList );
93 }
94 else {
95 super.marshal(getPersistenceService().resolveProxy(obj), writer, context);
96 }
97 }
98
99 public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
100 return null;
101 }
102 }
103
104 public class ProxyAndStateAwareJavaReflectionProvider extends PureJavaReflectionProvider {
105 @Override
106 public void visitSerializableFields(Object object, Visitor visitor) {
107 SerializationState state = serializationStates.get();
108 PropertySerializabilityEvaluator evaluator = evaluators.get();
109
110 for (Iterator iterator = fieldDictionary.serializableFieldsFor(object.getClass()); iterator.hasNext();) {
111 Field field = (Field) iterator.next();
112 if (!fieldModifiersSupported(field)) {
113 continue;
114 }
115
116 if (ignoreField(field)) {
117 continue;
118 }
119
120 validateFieldAccess(field);
121
122 initializeField(object, field);
123
124 Object value = null;
125 try {
126 value = field.get(object);
127 } catch (IllegalArgumentException e) {
128 throw new ObjectAccessException("Could not get field " + field.getClass() + "." + field.getName(), e);
129 } catch (IllegalAccessException e) {
130 throw new ObjectAccessException("Could not get field " + field.getClass() + "." + field.getName(), e);
131 }
132
133 if (evaluator.isPropertySerializable(state, object, field.getName(), value)) {
134 if (value != null && ProxyHelper.isProxy(value)) {
135
136 value = getPersistenceService().resolveProxy(value);
137 }
138 PropertyType propertyType = evaluator.determinePropertyType(value);
139 state.addSerializedProperty(field.getName(), propertyType);
140 visitor.visit(field.getName(), field.getType(), field.getDeclaringClass(), value);
141 state.removeSerializedProperty();
142 }
143 }
144 }
145
146 protected boolean ignoreField(Field field) {
147 return false;
148 }
149
150 protected void initializeField(Object object, Field field) {
151 }
152 }
153
154 public PersistenceService getPersistenceService() {
155 return this.persistenceService;
156 }
157
158 public void setPersistenceService(PersistenceService persistenceService) {
159 this.persistenceService = persistenceService;
160 }
161
162 public XmlObjectSerializerService getXmlObjectSerializerService() {
163 return this.xmlObjectSerializerService;
164 }
165
166 public void setXmlObjectSerializerService(XmlObjectSerializerService xmlObjectSerializerService) {
167 this.xmlObjectSerializerService = xmlObjectSerializerService;
168 }
169
170 protected SerializationState createNewDocumentSerializationState(Document document) {
171 return new SerializationState();
172 }
173
174 public class AutoPopulatingListConverter extends CollectionConverter {
175
176 public AutoPopulatingListConverter(Mapper mapper){
177 super(mapper);
178 }
179
180 @Override
181 public boolean canConvert(Class clazz) {
182 return clazz.equals(AutoPopulatingList.class);
183 }
184
185 }
186
187
188 }
189