/**
* 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.waveprotocol.wave.model.account;
import org.waveprotocol.wave.model.util.CollectionUtils;
import org.waveprotocol.wave.model.util.CopyOnWriteSet;
import org.waveprotocol.wave.model.util.Preconditions;
import org.waveprotocol.wave.model.wave.ParticipantId;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
/**
* Plain Java implementation of Indexability.
*
*/
public class BasicObservableIndexability implements ObservableMutableIndexability {
private final Map<ParticipantId, IndexDecision> map = CollectionUtils.newHashMap();
private final CopyOnWriteSet<ObservableIndexability.Listener> listeners = CopyOnWriteSet.create();
@Override
public void setIndexability(ParticipantId participant, IndexDecision indexability) {
Preconditions.checkNotNull(participant, "Participant can't be null");
IndexDecision current = getIndexability(participant);
if (indexability == null) {
map.remove(participant);
} else {
map.put(participant, indexability);
}
if (current != indexability) {
for (ObservableIndexability.Listener l : listeners) {
l.onChanged(participant, indexability);
}
}
}
@Override
public IndexDecision getIndexability(ParticipantId participant) {
return map.get(participant);
}
@Override
public void addListener(Listener listener) {
listeners.add(listener);
}
@Override
public void removeListener(Listener listener) {
listeners.remove(listener);
}
@Override
public Set<ParticipantId> getIndexDecisions() {
return Collections.unmodifiableSet(map.keySet());
}
}