/*****************************************************************
* 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.cayenne.reflect.valueholder;
import java.util.Map;
import org.apache.cayenne.Persistent;
import org.apache.cayenne.ValueHolder;
import org.apache.cayenne.reflect.Accessor;
import org.apache.cayenne.reflect.ClassDescriptor;
import org.apache.cayenne.reflect.PropertyException;
import org.apache.cayenne.reflect.ToManyMapProperty;
import org.apache.cayenne.util.PersistentObjectMap;
/**
* @since 3.0
*/
class ValueHolderMapProperty extends ValueHolderToManyProperty implements
ToManyMapProperty {
private Accessor mapKeyAccessor;
ValueHolderMapProperty(ClassDescriptor owner, ClassDescriptor targetDescriptor,
Accessor accessor, String reverseName, Accessor mapKeyAccessor) {
super(owner, targetDescriptor, accessor, reverseName);
this.mapKeyAccessor = mapKeyAccessor;
}
@Override
public void addTarget(Object source, Object target, boolean setReverse) {
if (target == null) {
throw new NullPointerException("Attempt to add null object.");
}
// Now do the rest of the normal handling (regardless of whether it was
// flattened or not)
Map<Object, Object> collection = (Map<Object, Object>) readProperty(source);
collection.put(getMapKey(target), target);
if (setReverse) {
setReverse(source, null, target);
}
}
@Override
public void removeTarget(Object source, Object target, boolean setReverse) {
// Now do the rest of the normal handling (regardless of whether it was
// flattened or not)
Map<Object, Object> collection = (Map<Object, Object>) readProperty(source);
collection.remove(getMapKey(target));
if (target != null && setReverse) {
setReverse(source, target, null);
}
}
@Override
protected ValueHolder createCollectionValueHolder(Object object)
throws PropertyException {
if (!(object instanceof Persistent)) {
throw new PropertyException(
"ValueHolders for non-persistent objects are not supported.",
this,
object);
}
return new PersistentObjectMap((Persistent) object, getName(), mapKeyAccessor);
}
public Object getMapKey(Object target) throws PropertyException {
return mapKeyAccessor.getValue(target);
}
}