/**
* Copyright 2009 Google Inc.
*
* Licensed 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.waveprotocol.wave.model.adt;
import org.waveprotocol.wave.model.util.DeletionListener;
import org.waveprotocol.wave.model.util.StructuredValue;
import org.waveprotocol.wave.model.wave.SourcesEvents;
import java.util.Map;
/**
* An observable structured value.
*
* @author anorth@google.com (Alex North)
* @param <K> enumerated type of the field names
* @param <V> field value type
*/
public interface ObservableStructuredValue<K extends Enum<K>, V> extends StructuredValue<K, V>,
SourcesEvents<ObservableStructuredValue.Listener<K, ? super V>> {
public interface Listener<K, V> extends DeletionListener {
/**
* Called when one or more fields change value. Each map will have the same
* set of keys, being the names of the changed fields. A newly set value will
* be null in {@code oldValues}. A cleared value will be null in {@code
* newValues}.
*
* @param oldValues the old values of changed fields
* @param newValues the new values of changed fields
*/
void onValuesChanged(Map<K, ? extends V> oldValues, Map<K, ? extends V> newValues);
}
}