/**
* 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.wave.data.impl;
import org.waveprotocol.wave.model.id.WaveId;
import org.waveprotocol.wave.model.id.WaveletId;
import org.waveprotocol.wave.model.version.HashedVersion;
import org.waveprotocol.wave.model.wave.ParticipantId;
import org.waveprotocol.wave.model.wave.data.ReadableBlipData;
import org.waveprotocol.wave.model.wave.data.ReadableWaveletData;
import java.util.Collections;
import java.util.Set;
/**
* A basic implementation for an empty ReadableWaveletData.
*/
public class EmptyWaveletSnapshot implements ReadableWaveletData {
private final WaveId waveId;
private final WaveletId waveletId;
private final ParticipantId creator;
private final long creationTime;
private final HashedVersion hashedVersion;
/**
* Creates an empty snapshot.
*/
public EmptyWaveletSnapshot(WaveId waveId, WaveletId waveletId, ParticipantId creator,
HashedVersion version, long creationTime) {
this.waveId = waveId;
this.waveletId = waveletId;
this.creator = creator;
this.hashedVersion = version;
this.creationTime = creationTime;
}
@Override
public long getCreationTime() {
return creationTime;
}
@Override
public ParticipantId getCreator() {
return creator;
}
@Override
public HashedVersion getHashedVersion() {
return hashedVersion;
}
@Override
public ReadableBlipData getDocument(String documentName) {
return null;
}
@Override
public Set<String> getDocumentIds() {
return Collections.emptySet();
}
@Override
public long getLastModifiedTime() {
return getCreationTime();
}
@Override
public Set<ParticipantId> getParticipants() {
return Collections.emptySet();
}
@Override
public long getVersion() {
return getHashedVersion().getVersion();
}
@Override
public WaveId getWaveId() {
return waveId;
}
@Override
public WaveletId getWaveletId() {
return waveletId;
}
}