/**
* Copyright 2010 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.account;
import org.waveprotocol.wave.model.util.Preconditions;
import org.waveprotocol.wave.model.wave.ParticipantId;
import java.util.Set;
/**
* A wrapper for Indexability that provides default values for absent
* assignments. Setting an indexability to the default value clears the
* assignment.
*
*/
public class DefaultingIndexability implements MutableIndexability {
private final MutableIndexability target;
private final IndexDecision defaultDecision;
public DefaultingIndexability(
final MutableIndexability indexability, IndexDecision defaultDecision) {
Preconditions.checkNotNull(indexability, "indexability can't be null");
this.target = indexability;
this.defaultDecision = defaultDecision;
}
@Override
public Set<ParticipantId> getIndexDecisions() {
return target.getIndexDecisions();
}
@Override
public IndexDecision getIndexability(ParticipantId participant) {
IndexDecision result = target.getIndexability(participant);
if (result == null) {
return defaultDecision;
}
return result;
}
@Override
public void setIndexability(ParticipantId participant, IndexDecision indexability) {
if (indexability == defaultDecision) {
target.setIndexability(participant, null);
} else {
target.setIndexability(participant, indexability);
}
}
}