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package org.kuali.rice.kns.service.impl; |
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import com.thoughtworks.xstream.XStream; |
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import com.thoughtworks.xstream.converters.MarshallingContext; |
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import com.thoughtworks.xstream.converters.reflection.ObjectAccessException; |
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import com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider; |
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import com.thoughtworks.xstream.converters.reflection.ReflectionConverter; |
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import com.thoughtworks.xstream.converters.reflection.ReflectionProvider; |
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import com.thoughtworks.xstream.io.HierarchicalStreamWriter; |
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import com.thoughtworks.xstream.mapper.Mapper; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import org.apache.ojb.broker.core.proxy.ListProxyDefaultImpl; |
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import org.apache.ojb.broker.core.proxy.ProxyHelper; |
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import org.kuali.rice.kns.service.KNSServiceLocator; |
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import org.kuali.rice.kns.service.PersistenceService; |
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import org.kuali.rice.kns.service.XmlObjectSerializerService; |
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import javax.xml.transform.*; |
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import javax.xml.transform.dom.DOMSource; |
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import javax.xml.transform.stream.StreamResult; |
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import java.io.StringWriter; |
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import java.lang.reflect.Field; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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public class XmlObjectSerializerServiceImpl implements XmlObjectSerializerService { |
51 | 0 | private static final Log LOG = LogFactory.getLog(XmlObjectSerializerServiceImpl.class); |
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private PersistenceService persistenceService; |
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private XStream xstream; |
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57 | 0 | public XmlObjectSerializerServiceImpl() { |
58 | 0 | xstream = new XStream(new ProxyAwareJavaReflectionProvider()); |
59 | 0 | xstream.registerConverter(new ProxyConverter(xstream.getMapper(), xstream.getReflectionProvider() )); |
60 | 0 | xstream.addDefaultImplementation(ArrayList.class, ListProxyDefaultImpl.class); |
61 | 0 | } |
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public String toXml(Object object) { |
67 | 0 | if ( LOG.isDebugEnabled() ) { |
68 | 0 | LOG.debug( "toXml(" + object + ") : \n" + xstream.toXML(object) ); |
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} |
70 | 0 | return xstream.toXML(object); |
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} |
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public Object fromXml(String xml) { |
77 | 0 | if ( LOG.isDebugEnabled() ) { |
78 | 0 | LOG.debug( "fromXml() : \n" + xml ); |
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} |
80 | 0 | if ( xml != null ) { |
81 | 0 | xml = xml.replaceAll( "--EnhancerByCGLIB--[0-9a-f]{0,8}", "" ); |
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} |
83 | 0 | return xstream.fromXML(xml); |
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} |
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public String writeNode(org.w3c.dom.Node node, boolean indent) throws TransformerException { |
87 | 0 | Source source = new DOMSource(node); |
88 | 0 | StringWriter writer = new StringWriter(); |
89 | 0 | Result result = new StreamResult(writer); |
90 | 0 | Transformer transformer = TransformerFactory.newInstance().newTransformer(); |
91 | 0 | transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); |
92 | 0 | if (indent) { |
93 | 0 | transformer.setOutputProperty(OutputKeys.INDENT, "yes"); |
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} |
95 | 0 | transformer.transform(source, result); |
96 | 0 | return writer.toString(); |
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} |
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public class ProxyConverter extends ReflectionConverter { |
105 | 0 | public ProxyConverter(Mapper mapper, ReflectionProvider reflectionProvider) { |
106 | 0 | super(mapper, reflectionProvider); |
107 | 0 | } |
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public boolean canConvert(Class clazz) { |
109 | 0 | return clazz.getName().contains("CGLIB"); |
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} |
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public void marshal(Object obj, HierarchicalStreamWriter writer, MarshallingContext context) { |
113 | 0 | super.marshal(getPersistenceService().resolveProxy(obj), writer, context); |
114 | 0 | } |
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} |
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public class ProxyAwareJavaReflectionProvider extends PureJavaReflectionProvider { |
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121 | 0 | public ProxyAwareJavaReflectionProvider() { |
122 | 0 | super(); |
123 | 0 | } |
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@Override |
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public void visitSerializableFields(Object object, Visitor visitor) { |
129 | 0 | for (Iterator iterator = fieldDictionary.serializableFieldsFor(object.getClass()); iterator.hasNext();) { |
130 | 0 | Field field = (Field) iterator.next(); |
131 | 0 | if (!fieldModifiersSupported(field)) { |
132 | 0 | continue; |
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} |
134 | 0 | validateFieldAccess(field); |
135 | 0 | Object value = null; |
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try { |
137 | 0 | value = field.get(object); |
138 | 0 | if (value != null && ProxyHelper.isProxy(value)) { |
139 | 0 | value = getPersistenceService().resolveProxy(value); |
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} |
141 | 0 | } catch (IllegalArgumentException e) { |
142 | 0 | throw new ObjectAccessException("Could not get field " + field.getClass() + "." + field.getName(), e); |
143 | 0 | } catch (IllegalAccessException e) { |
144 | 0 | throw new ObjectAccessException("Could not get field " + field.getClass() + "." + field.getName(), e); |
145 | 0 | } |
146 | 0 | visitor.visit(field.getName(), field.getType(), field.getDeclaringClass(), value); |
147 | 0 | } |
148 | 0 | } |
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} |
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public PersistenceService getPersistenceService() { |
153 | 0 | if ( persistenceService == null ) { |
154 | 0 | persistenceService = KNSServiceLocator.getPersistenceService(); |
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} |
156 | 0 | return persistenceService; |
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} |
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} |