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25 
26 package com.sun.xml.internal.bind.v2.runtime.unmarshaller;
27 
28 import java.util.Collection;
29 
30 import javax.xml.namespace.QName;
31 
32 import com.sun.xml.internal.bind.DatatypeConverterImpl;
33 import com.sun.xml.internal.bind.v2.WellKnownNamespace;
34 import com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl;
35 import com.sun.xml.internal.bind.v2.runtime.JaxBeanInfo;
36 import com.sun.xml.internal.bind.v2.runtime.reflect.Accessor;
37 import com.sun.xml.internal.bind.v2.runtime.reflect.TransducedAccessor;
38 
39 import org.xml.sax.Attributes;
40 import org.xml.sax.SAXException;
41 
42 public final class LeafPropertyXsiLoader extends Loader {
43 
44     private final Loader defaultLoader;
45     private final TransducedAccessor xacc;
46     private final Accessor acc;
47 
LeafPropertyXsiLoader(Loader defaultLoader, TransducedAccessor xacc, Accessor acc)48     public LeafPropertyXsiLoader(Loader defaultLoader, TransducedAccessor xacc, Accessor acc) {
49         this.defaultLoader = defaultLoader;
50         this.expectText = true;
51         this.xacc = xacc;
52         this.acc = acc;
53     }
54 
55 
56     @Override
startElement(UnmarshallingContext.State state, TagName ea)57     public void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
58         final Loader loader = selectLoader(state, ea);
59         state.setLoader(loader);
60         loader.startElement(state, ea);
61     }
62 
selectLoader(UnmarshallingContext.State state, TagName ea)63     protected Loader selectLoader(UnmarshallingContext.State state, TagName ea) throws SAXException {
64 
65         UnmarshallingContext context = state.getContext();
66         JaxBeanInfo beanInfo = null;
67 
68         // look for @xsi:type
69         Attributes atts = ea.atts;
70         int idx = atts.getIndex(WellKnownNamespace.XML_SCHEMA_INSTANCE, "type");
71 
72         if (idx >= 0) {
73             String value = atts.getValue(idx);
74 
75             QName type = DatatypeConverterImpl._parseQName(value, context);
76 
77             if (type == null)
78                 return defaultLoader;
79 
80             beanInfo = context.getJAXBContext().getGlobalType(type);
81             if (beanInfo == null)
82                 return defaultLoader;
83             ClassBeanInfoImpl cbii;
84             try {
85                 cbii = (ClassBeanInfoImpl) beanInfo;
86             } catch (ClassCastException cce) {
87                 return defaultLoader;
88             }
89 
90             if (null == cbii.getTransducer()) {
91                 return defaultLoader;
92             }
93 
94             return new LeafPropertyLoader(
95                     new TransducedAccessor.CompositeTransducedAccessorImpl(
96                             state.getContext().getJAXBContext(),
97                             cbii.getTransducer(),
98                             acc));
99         }
100 
101         return defaultLoader;
102     }
103 
104     @Override
getExpectedChildElements()105     public Collection<QName> getExpectedChildElements() {
106         return defaultLoader.getExpectedChildElements();
107     }
108 
109     @Override
getExpectedAttributes()110     public Collection<QName> getExpectedAttributes() {
111         return defaultLoader.getExpectedAttributes();
112     }
113 }
114