com.sun.xml.bind.v2.runtime.property.SingleMapNodeProperty Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jaxb-impl Show documentation
Show all versions of jaxb-impl Show documentation
Old JAXB Runtime module. Contains sources required for runtime processing.
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.xml.bind.v2.runtime.property;
import java.io.IOException;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.TreeMap;
import java.util.Collection;
import java.util.Collections;
import java.util.Arrays;
import java.util.Set;
import javax.xml.stream.XMLStreamException;
import javax.xml.namespace.QName;
import com.sun.xml.bind.api.AccessorException;
import com.sun.xml.bind.v2.ClassFactory;
import com.sun.xml.bind.v2.util.QNameMap;
import com.sun.xml.bind.v2.model.core.PropertyKind;
import com.sun.xml.bind.v2.model.nav.ReflectionNavigator;
import com.sun.xml.bind.v2.model.runtime.RuntimeMapPropertyInfo;
import com.sun.xml.bind.v2.runtime.JAXBContextImpl;
import com.sun.xml.bind.v2.runtime.JaxBeanInfo;
import com.sun.xml.bind.v2.runtime.Name;
import com.sun.xml.bind.v2.runtime.XMLSerializer;
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.UnmarshallingContext;
import com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.State;
import org.xml.sax.SAXException;
/**
* @author Kohsuke Kawaguchi
*/
final class SingleMapNodeProperty extends PropertyImpl {
private final Accessor acc;
/**
* The tag name that surrounds the whole property.
*/
private final Name tagName;
/**
* The tag name that corresponds to the 'entry' element.
*/
private final Name entryTag;
private final Name keyTag;
private final Name valueTag;
private final boolean nillable;
private JaxBeanInfo keyBeanInfo;
private JaxBeanInfo valueBeanInfo;
/**
* The implementation class for this property.
* If the property is null, we create an instance of this class.
*/
private final Class mapImplClass;
public SingleMapNodeProperty(JAXBContextImpl context, RuntimeMapPropertyInfo prop) {
super(context, prop);
acc = prop.getAccessor().optimize(context);
this.tagName = context.nameBuilder.createElementName(prop.getXmlName());
this.entryTag = context.nameBuilder.createElementName("","entry");
this.keyTag = context.nameBuilder.createElementName("","key");
this.valueTag = context.nameBuilder.createElementName("","value");
this.nillable = prop.isCollectionNillable();
this.keyBeanInfo = context.getOrCreate(prop.getKeyType());
this.valueBeanInfo = context.getOrCreate(prop.getValueType());
// infer the implementation class
Class sig = ReflectionNavigator.REFLECTION.erasure(prop.getRawType());
mapImplClass = ClassFactory.inferImplClass(sig,knownImplClasses);
// TODO: error check for mapImplClass==null
// what is the error reporting path for this part of the code?
}
private static final Class[] knownImplClasses = {
HashMap.class, TreeMap.class, LinkedHashMap.class
};
public void reset(BeanT bean) throws AccessorException {
acc.set(bean,null);
}
/**
* A Map property can never be ID.
*/
public String getIdValue(BeanT bean) {
return null;
}
public PropertyKind getKind() {
return PropertyKind.MAP;
}
public void buildChildElementUnmarshallers(UnmarshallerChain chain, QNameMap handlers) {
keyLoader = keyBeanInfo.getLoader(chain.context,true);
valueLoader = valueBeanInfo.getLoader(chain.context,true);
handlers.put(tagName,new ChildLoader(itemsLoader,null));
}
private Loader keyLoader;
private Loader valueLoader;
/**
* Handles <items> and </items>.
*
* The target will be set to a {@link Map}.
*/
private final Loader itemsLoader = new Loader(false) {
private ThreadLocal target = new ThreadLocal();
private ThreadLocal map = new ThreadLocal();
private int depthCounter = 0; // needed to clean ThreadLocals
@Override
public void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
// create or obtain the Map object
try {
target.set((BeanT)state.prev.target);
map.set(acc.get(target.get()));
depthCounter++;
if(map.get() == null) {
map.set(ClassFactory.create(mapImplClass));
}
map.get().clear();
state.target = map.get();
} catch (AccessorException e) {
// recover from error by setting a dummy Map that receives and discards the values
handleGenericException(e,true);
state.target = new HashMap();
}
}
@Override
public void leaveElement(State state, TagName ea) throws SAXException {
super.leaveElement(state, ea);
try {
acc.set(target.get(), map.get());
if (--depthCounter == 0) {
target.remove();
map.remove();
}
} catch (AccessorException ex) {
handleGenericException(ex,true);
}
}
@Override
public void childElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
if(ea.matches(entryTag)) {
state.loader = entryLoader;
} else {
super.childElement(state,ea);
}
}
@Override
public Collection getExpectedChildElements() {
return Collections.singleton(entryTag.toQName());
}
};
/**
* Handles <entry> and </entry>.
*
* The target will be set to a {@link Map}.
*/
private final Loader entryLoader = new Loader(false) {
@Override
public void startElement(UnmarshallingContext.State state, TagName ea) {
state.target = new Object[2]; // this is inefficient
}
@Override
public void leaveElement(UnmarshallingContext.State state, TagName ea) {
Object[] keyValue = (Object[])state.target;
Map map = (Map) state.prev.target;
map.put(keyValue[0],keyValue[1]);
}
@Override
public void childElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
if(ea.matches(keyTag)) {
state.loader = keyLoader;
state.receiver = keyReceiver;
return;
}
if(ea.matches(valueTag)) {
state.loader = valueLoader;
state.receiver = valueReceiver;
return;
}
super.childElement(state,ea);
}
@Override
public Collection getExpectedChildElements() {
return Arrays.asList(keyTag.toQName(),valueTag.toQName());
}
};
private static final class ReceiverImpl implements Receiver {
private final int index;
public ReceiverImpl(int index) {
this.index = index;
}
public void receive(UnmarshallingContext.State state, Object o) {
((Object[])state.target)[index] = o;
}
}
private static final Receiver keyReceiver = new ReceiverImpl(0);
private static final Receiver valueReceiver = new ReceiverImpl(1);
@Override
public void serializeBody(BeanT o, XMLSerializer w, Object outerPeer) throws SAXException, AccessorException, IOException, XMLStreamException {
ValueT v = acc.get(o);
if(v!=null) {
bareStartTag(w,tagName,v);
for( Map.Entry e : (Set)v.entrySet() ) {
bareStartTag(w,entryTag,null);
Object key = e.getKey();
if(key!=null) {
w.startElement(keyTag,key);
w.childAsXsiType(key,fieldName,keyBeanInfo, false);
w.endElement();
}
Object value = e.getValue();
if(value!=null) {
w.startElement(valueTag,value);
w.childAsXsiType(value,fieldName,valueBeanInfo, false);
w.endElement();
}
w.endElement();
}
w.endElement();
} else
if(nillable) {
w.startElement(tagName,null);
w.writeXsiNilTrue();
w.endElement();
}
}
private void bareStartTag(XMLSerializer w, Name tagName, Object peer) throws IOException, XMLStreamException, SAXException {
w.startElement(tagName,peer);
w.endNamespaceDecls(peer);
w.endAttributes();
}
@Override
public Accessor getElementPropertyAccessor(String nsUri, String localName) {
if(tagName.equals(nsUri,localName))
return acc;
return null;
}
}