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package com.sun.xml.bind.v2.runtime.unmarshaller;
import javax.xml.namespace.QName;
import com.sun.xml.bind.DatatypeConverterImpl;
import com.sun.xml.bind.v2.WellKnownNamespace;
import com.sun.xml.bind.v2.runtime.JaxBeanInfo;
import com.sun.istack.Nullable;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* Looks at @xsi:type and forwards to the right {@link Loader}.
*
* @author Kohsuke Kawaguchi
*/
public class XsiTypeLoader extends Loader {
/**
* Use this when no @xsi:type was found.
*/
private final JaxBeanInfo defaultBeanInfo;
public XsiTypeLoader(JaxBeanInfo defaultBeanInfo) {
super(true);
this.defaultBeanInfo = defaultBeanInfo;
}
public void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
JaxBeanInfo beanInfo = parseXsiType(state,ea,defaultBeanInfo);
if(beanInfo==null)
beanInfo = defaultBeanInfo;
Loader loader = beanInfo.getLoader(null,false);
state.loader = loader;
loader.startElement(state,ea);
}
/*pacakge*/ static JaxBeanInfo parseXsiType(UnmarshallingContext.State state, TagName ea, @Nullable JaxBeanInfo defaultBeanInfo) throws SAXException {
UnmarshallingContext context = state.getContext();
JaxBeanInfo beanInfo = null;
// look for @xsi:type
Attributes atts = ea.atts;
int idx = atts.getIndex(WellKnownNamespace.XML_SCHEMA_INSTANCE,"type");
if(idx>=0) {
// we'll consume the value only when it's a recognized value,
// so don't consume it just yet.
String value = atts.getValue(idx);
QName type = DatatypeConverterImpl._parseQName(value,context);
if(type==null) {
reportError(Messages.NOT_A_QNAME.format(value),true);
} else {
if(defaultBeanInfo!=null && defaultBeanInfo.getTypeNames().contains(type))
// if this xsi:type is something that the default type can already handle,
// let it do so. This is added as a work around to bug https://jax-ws.dev.java.net/issues/show_bug.cgi?id=195
// where a redundant xsi:type="xs:dateTime" causes JAXB to unmarshal XMLGregorianCalendar,
// where Date is expected.
// this is not a complete fix, as we still won't be able to handle simple type substitution in general,
// but none-the-less
return defaultBeanInfo;
beanInfo = context.getJAXBContext().getGlobalType(type);
if(beanInfo==null) {
String nearest = context.getJAXBContext().getNearestTypeName(type);
if(nearest!=null)
reportError(Messages.UNRECOGNIZED_TYPE_NAME_MAYBE.format(type,nearest),true);
else
reportError(Messages.UNRECOGNIZED_TYPE_NAME.format(type),true);
}
// TODO: resurrect the following check
// else
// if(!target.isAssignableFrom(actual)) {
// reportError(context,
// Messages.UNSUBSTITUTABLE_TYPE.format(value,actual.getName(),target.getName()),
// true);
// actual = targetBeanInfo; // ditto
// }
}
}
return beanInfo;
}
static final QName XsiTypeQNAME = new QName(WellKnownNamespace.XML_SCHEMA_INSTANCE,"type");
@Override
public Collection getExpectedAttributes() {
final Collection expAttrs = new HashSet();
expAttrs.addAll(super.getExpectedAttributes());
expAttrs.add(XsiTypeQNAME);
return Collections.unmodifiableCollection(expAttrs);
}
}
