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package com.sun.xml.bind.v2.runtime.property;
import java.io.IOException;
import java.util.Collection;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import com.sun.xml.bind.api.AccessorException;
import com.sun.xml.bind.v2.util.QNameMap;
import com.sun.xml.bind.v2.model.runtime.RuntimePropertyInfo;
import com.sun.xml.bind.v2.runtime.JAXBContextImpl;
import com.sun.xml.bind.v2.runtime.Name;
import com.sun.xml.bind.v2.runtime.XMLSerializer;
import com.sun.xml.bind.v2.runtime.reflect.Lister;
import com.sun.xml.bind.v2.runtime.reflect.Accessor;
import com.sun.xml.bind.v2.runtime.unmarshaller.ChildLoader;
import com.sun.xml.bind.v2.runtime.unmarshaller.TagName;
import com.sun.xml.bind.v2.runtime.unmarshaller.Loader;
import com.sun.xml.bind.v2.runtime.unmarshaller.Receiver;
import com.sun.xml.bind.v2.runtime.unmarshaller.Scope;
import com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext;
import com.sun.xml.bind.v2.runtime.unmarshaller.XsiNilLoader;
import org.xml.sax.SAXException;
/**
* Commonality between {@link ArrayElementProperty} and {@link ArrayReferenceNodeProperty}.
*
* Mostly handles the unmarshalling of the wrapper element.
*
* @author Kohsuke Kawaguchi
*/
abstract class ArrayERProperty extends ArrayProperty {
/**
* Wrapper tag name if any, or null.
*/
protected final Name wrapperTagName;
/**
* True if the wrapper tag name is nillable.
* Always false if {@link #wrapperTagName}==null.
*/
protected final boolean isWrapperNillable;
protected ArrayERProperty(JAXBContextImpl grammar, RuntimePropertyInfo prop, QName tagName, boolean isWrapperNillable) {
super(grammar,prop);
if(tagName==null)
this.wrapperTagName = null;
else
this.wrapperTagName = grammar.nameBuilder.createElementName(tagName);
this.isWrapperNillable = isWrapperNillable;
}
/**
* Used to handle the collection wrapper element.
*/
private static final class ItemsLoader extends Loader {
private final Accessor acc;
private final Lister lister;
public ItemsLoader(Accessor acc, Lister lister, QNameMap children) {
super(false);
this.acc = acc;
this.lister = lister;
this.children = children;
}
@Override
public void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
UnmarshallingContext context = state.getContext();
context.startScope(1);
// inherit the target so that our children can access its target
state.target = state.prev.target;
// start it now, so that even if there's no children we can still return empty collection
context.getScope(0).start(acc,lister);
}
private final QNameMap children;
@Override
public void childElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
ChildLoader child = children.get(ea.uri,ea.local);
if (child == null) {
child = children.get(CATCH_ALL);
}
if (child == null) {
super.childElement(state,ea);
return;
}
state.loader = child.loader;
state.receiver = child.receiver;
}
@Override
public void leaveElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
state.getContext().endScope(1);
}
@Override
public Collection getExpectedChildElements() {
return children.keySet();
}
}
public final void serializeBody(BeanT o, XMLSerializer w, Object outerPeer) throws SAXException, AccessorException, IOException, XMLStreamException {
ListT list = acc.get(o);
if(list!=null) {
if(wrapperTagName!=null) {
w.startElement(wrapperTagName,null);
w.endNamespaceDecls(list);
w.endAttributes();
}
serializeListBody(o,w,list);
if(wrapperTagName!=null)
w.endElement();
} else {
// list is null
if(isWrapperNillable) {
w.startElement(wrapperTagName,null);
w.writeXsiNilTrue();
w.endElement();
} // otherwise don't print the wrapper tag name
}
}
/**
* Serializes the items of the list.
* This method is invoked after the necessary wrapper tag is produced (if necessary.)
*
* @param list
* always non-null.
*/
protected abstract void serializeListBody(BeanT o, XMLSerializer w, ListT list) throws IOException, XMLStreamException, SAXException, AccessorException;
/**
* Creates the unmarshaler to unmarshal the body.
*/
protected abstract void createBodyUnmarshaller(UnmarshallerChain chain, QNameMap loaders);
public final void buildChildElementUnmarshallers(UnmarshallerChain chain, QNameMap loaders) {
if(wrapperTagName!=null) {
UnmarshallerChain c = new UnmarshallerChain(chain.context);
QNameMap m = new QNameMap();
createBodyUnmarshaller(c,m);
Loader loader = new ItemsLoader(acc, lister, m);
if(isWrapperNillable || chain.context.allNillable)
loader = new XsiNilLoader(loader);
loaders.put(wrapperTagName,new ChildLoader(loader,null));
} else {
createBodyUnmarshaller(chain,loaders);
}
}
/**
* {@link Receiver} that puts the child object into the {@link Scope} object.
*/
protected final class ReceiverImpl implements Receiver {
private final int offset;
protected ReceiverImpl(int offset) {
this.offset = offset;
}
public void receive(UnmarshallingContext.State state, Object o) throws SAXException {
state.getContext().getScope(offset).add(acc,lister,o);
}
}}
