/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.ocm.manager.collectionconverter.impl;
import java.util.Iterator;
import java.util.Map;
import javax.jcr.Node;
import javax.jcr.Property;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.Value;
import javax.jcr.ValueFactory;
import javax.jcr.ValueFormatException;
import org.apache.jackrabbit.ocm.exception.ObjectContentManagerException;
import org.apache.jackrabbit.ocm.manager.atomictypeconverter.AtomicTypeConverter;
import org.apache.jackrabbit.ocm.manager.collectionconverter.ManageableCollection;
import org.apache.jackrabbit.ocm.manager.collectionconverter.ManageableCollectionUtil;
import org.apache.jackrabbit.ocm.manager.objectconverter.ObjectConverter;
import org.apache.jackrabbit.ocm.mapper.Mapper;
import org.apache.jackrabbit.ocm.mapper.model.CollectionDescriptor;
import org.apache.jackrabbit.ocm.reflection.ReflectionUtils;
/**
* Collection Mapping/convertion implementation used for multi values properties
*
* This collection mapping strategy maps a collection into a JCR multi value property
*
* @author <a href="mailto:christophe.lombart@gmail.com">Christophe Lombart</a>
* @author <a href='mailto:the_mindstorm[at]evolva[dot]ro'>Alexandru Popescu</a>
*/
public class MultiValueCollectionConverterImpl extends AbstractCollectionConverterImpl {
/**
* Constructor
*
* @param atomicTypeConverters
* @param objectConverter
* @param mapper
*/
public MultiValueCollectionConverterImpl(Map atomicTypeConverters,
ObjectConverter objectConverter,
Mapper mapper) {
super(atomicTypeConverters, objectConverter, mapper);
}
/**
*
* @see AbstractCollectionConverterImpl#doInsertCollection(Session, Node, CollectionDescriptor, ManageableCollection)
*/
protected void doInsertCollection(Session session,
Node parentNode,
CollectionDescriptor collectionDescriptor,
ManageableCollection collection) throws RepositoryException {
try {
if (collection == null) {
return;
}
String jcrName = getCollectionJcrName(collectionDescriptor);
Value[] values = new Value[collection.getSize()];
ValueFactory valueFactory = session.getValueFactory();
Iterator collectionIterator = collection.getIterator();
for (int i = 0; i < collection.getSize(); i++) {
Object fieldValue = collectionIterator.next();
AtomicTypeConverter atomicTypeConverter = (AtomicTypeConverter) atomicTypeConverters
.get(fieldValue.getClass());
values[i] = atomicTypeConverter.getValue(valueFactory, fieldValue);
}
parentNode.setProperty(jcrName, values);
}
catch(ValueFormatException vfe) {
throw new ObjectContentManagerException("Cannot insert collection field : "
+ collectionDescriptor.getFieldName()
+ " of class "
+ collectionDescriptor.getClassDescriptor().getClassName(), vfe);
}
}
/**
*
* @see AbstractCollectionConverterImpl#doUpdateCollection(Session, Node, CollectionDescriptor, ManageableCollection)
*/
protected void doUpdateCollection(Session session,
Node parentNode,
CollectionDescriptor collectionDescriptor,
ManageableCollection collection) throws RepositoryException {
String jcrName = getCollectionJcrName(collectionDescriptor);
// Delete existing values
if (parentNode.hasProperty(jcrName)) {
parentNode.setProperty(jcrName, (Value[]) null);
}
if (collection == null) {
return;
}
// Add all collection element into an Value array
Value[] values = new Value[collection.getSize()];
ValueFactory valueFactory = session.getValueFactory();
int i = 0;
for (Iterator collectionIterator = collection.getIterator(); collectionIterator.hasNext(); i++) {
Object fieldValue = collectionIterator.next();
AtomicTypeConverter atomicTypeConverter = (AtomicTypeConverter) atomicTypeConverters
.get(fieldValue.getClass());
values[i] = atomicTypeConverter.getValue(valueFactory, fieldValue);
}
parentNode.setProperty(jcrName, values);
}
/**
* @see AbstractCollectionConverterImpl#doGetCollection(Session, Node, CollectionDescriptor, Class)
*/
protected ManageableCollection doGetCollection(Session session,
Node parentNode,
CollectionDescriptor collectionDescriptor,
Class collectionFieldClass) throws RepositoryException {
try {
String jcrName = getCollectionJcrName(collectionDescriptor);
if (!parentNode.hasProperty(jcrName)) {
return null;
}
Property property = parentNode.getProperty(jcrName);
Value[] values = property.getValues();
ManageableCollection collection = ManageableCollectionUtil.getManageableCollection(collectionFieldClass);
String elementClassName = collectionDescriptor.getElementClassName();
Class elementClass = ReflectionUtils.forName(elementClassName);
for (int i = 0; i < values.length; i++) {
AtomicTypeConverter atomicTypeConverter = (AtomicTypeConverter) atomicTypeConverters
.get(elementClass);
collection.addObject(atomicTypeConverter.getObject(values[i]));
}
return collection;
}
catch(ValueFormatException vfe) {
throw new ObjectContentManagerException("Cannot get the collection field : "
+ collectionDescriptor.getFieldName()
+ "for class " + collectionDescriptor.getClassDescriptor().getClassName(),
vfe);
}
}
/**
* @see AbstractCollectionConverterImpl#doIsNull(Session, Node, CollectionDescriptor, Class)
*/
protected boolean doIsNull(Session session,
Node parentNode,
CollectionDescriptor collectionDescriptor,
Class collectionFieldClass) throws RepositoryException {
String jcrName = getCollectionJcrName(collectionDescriptor);
if (!parentNode.hasProperty(jcrName)) {
return true;
}
return false;
}
}