ArrayElementProperty.java
/*
* Copyright (c) 1997, 2022 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.glassfish.jaxb.runtime.v2.runtime.property;
import org.glassfish.jaxb.runtime.api.AccessorException;
import org.glassfish.jaxb.core.v2.model.core.PropertyKind;
import org.glassfish.jaxb.core.v2.model.core.TypeRef;
import org.glassfish.jaxb.runtime.v2.model.runtime.RuntimeElementPropertyInfo;
import org.glassfish.jaxb.runtime.v2.model.runtime.RuntimeTypeRef;
import org.glassfish.jaxb.core.v2.runtime.RuntimeUtil;
import org.glassfish.jaxb.runtime.v2.runtime.*;
import org.glassfish.jaxb.runtime.v2.runtime.reflect.Accessor;
import org.glassfish.jaxb.runtime.v2.runtime.reflect.ListIterator;
import org.glassfish.jaxb.runtime.v2.runtime.reflect.Lister;
import org.glassfish.jaxb.runtime.v2.runtime.reflect.NullSafeAccessor;
import org.glassfish.jaxb.runtime.v2.runtime.unmarshaller.*;
import org.glassfish.jaxb.runtime.v2.util.QNameMap;
import jakarta.xml.bind.JAXBException;
import org.xml.sax.SAXException;
import javax.xml.stream.XMLStreamException;
import java.io.IOException;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* {@link Property} implementation for multi-value property that maps to an element.
*
* @author Kohsuke Kawaguchi
*/
abstract class ArrayElementProperty<BeanT,ListT,ItemT> extends ArrayERProperty<BeanT,ListT,ItemT> {
private final Map<Class,TagAndType> typeMap = new HashMap<>();
/**
* Set by the constructor and reset in the {@link #wrapUp()} method.
*/
private Map<TypeRef<Type,Class>, JaxBeanInfo> refs = new HashMap<>();
/**
* Set by the constructor and reset in the {@link #wrapUp()} method.
*/
protected RuntimeElementPropertyInfo prop;
/**
* Tag name used when we see null in the collection. Can be null.
*/
private final Name nillableTagName;
protected ArrayElementProperty(JAXBContextImpl grammar, RuntimeElementPropertyInfo prop) {
super(grammar, prop, prop.getXmlName(), prop.isCollectionNillable());
this.prop = prop;
List<? extends RuntimeTypeRef> types = prop.getTypes();
Name n = null;
for (RuntimeTypeRef typeRef : types) {
Class type = (Class)typeRef.getTarget().getType();
if(type.isPrimitive())
type = RuntimeUtil.primitiveToBox.get(type);
JaxBeanInfo beanInfo = grammar.getOrCreate(typeRef.getTarget());
TagAndType tt = new TagAndType(
grammar.nameBuilder.createElementName(typeRef.getTagName()),
beanInfo);
typeMap.put(type,tt);
refs.put(typeRef,beanInfo);
if(typeRef.isNillable() && n==null)
n = tt.tagName;
}
nillableTagName = n;
}
@Override
public void wrapUp() {
super.wrapUp();
refs = null;
prop = null; // avoid keeping model objects live
}
@Override
protected void serializeListBody(BeanT beanT, XMLSerializer w, ListT list) throws IOException, XMLStreamException, SAXException, AccessorException {
ListIterator<ItemT> itr = lister.iterator(list, w);
boolean isIdref = itr instanceof Lister.IDREFSIterator; // UGLY
while(itr.hasNext()) {
try {
ItemT item = itr.next();
if (item != null) {
Class itemType = item.getClass();
if(isIdref)
// This should be the only place where we need to be aware
// that the iterator is iterating IDREFS.
itemType = ((Lister.IDREFSIterator)itr).last().getClass();
// normally, this returns non-null
TagAndType tt = typeMap.get(itemType);
while(tt==null && itemType!=null) {
// otherwise we'll just have to try the slow way
itemType = itemType.getSuperclass();
tt = typeMap.get(itemType);
}
if(tt==null) {
// item is not of the expected type.
// w.reportError(new ValidationEventImpl(ValidationEvent.ERROR,
// Messages.UNEXPECTED_JAVA_TYPE.format(
// item.getClass().getName(),
// getExpectedClassNameList()
// ),
// w.getCurrentLocation(fieldName)));
// continue;
// see the similar code in SingleElementNodeProperty.
// for the purpose of simple type substitution, make it a non-error
w.startElement(typeMap.values().iterator().next().tagName,null);
w.childAsXsiType(item,fieldName,w.grammar.getBeanInfo(Object.class), false);
} else {
w.startElement(tt.tagName,null);
serializeItem(tt.beanInfo,item,w);
}
w.endElement();
} else {
if(nillableTagName!=null) {
w.startElement(nillableTagName,null);
w.writeXsiNilTrue();
w.endElement();
}
}
} catch (JAXBException e) {
w.reportError(fieldName,e);
// recover by ignoring this item
}
}
}
/**
* Serializes one item of the property.
*/
protected abstract void serializeItem(JaxBeanInfo expected, ItemT item, XMLSerializer w) throws SAXException, AccessorException, IOException, XMLStreamException;
@Override
public void createBodyUnmarshaller(UnmarshallerChain chain, QNameMap<ChildLoader> loaders) {
// all items go to the same lister,
// so they should share the same offset.
int offset = chain.allocateOffset();
Receiver recv = new ReceiverImpl(offset);
for (RuntimeTypeRef typeRef : prop.getTypes()) {
Name tagName = chain.context.nameBuilder.createElementName(typeRef.getTagName());
Loader item = createItemUnmarshaller(chain,typeRef);
if(typeRef.isNillable() || chain.context.allNillable)
item = new XsiNilLoader.Array(item);
if(typeRef.getDefaultValue()!=null)
item = new DefaultValueLoaderDecorator(item,typeRef.getDefaultValue());
loaders.put(tagName,new ChildLoader(item,recv));
}
}
@Override
public final PropertyKind getKind() {
return PropertyKind.ELEMENT;
}
/**
* Creates a loader handler that unmarshals the body of the item.
*
* <p>
* This will be sandwiched into {@code <item> ... </item>}.
*
* <p>
* When unmarshalling the body of item, the Pack of {@link Lister} is available
* as the handler state.
*
*/
private Loader createItemUnmarshaller(UnmarshallerChain chain, RuntimeTypeRef typeRef) {
if(PropertyFactory.isLeaf(typeRef.getSource())) {
final Transducer xducer = typeRef.getTransducer();
return new TextLoader(xducer);
} else {
return refs.get(typeRef).getLoader(chain.context,true);
}
}
@Override
public Accessor getElementPropertyAccessor(String nsUri, String localName) {
if(wrapperTagName!=null) {
if(wrapperTagName.equals(nsUri,localName))
return acc;
} else {
for (TagAndType tt : typeMap.values()) {
if(tt.tagName.equals(nsUri,localName))
// when we can't distinguish null and empty list, JAX-WS doesn't want to see
// null (just like any user apps), but since we are providing a raw accessor,
// which just grabs the value from the field, we wrap it so that it won't return
// null.
return new NullSafeAccessor<>(acc,lister);
}
}
return null;
}
}