/**
* 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.wave.data.impl;
import org.waveprotocol.wave.model.document.operation.DocInitialization;
import org.waveprotocol.wave.model.version.HashedVersion;
import org.waveprotocol.wave.model.wave.ParticipantId;
import org.waveprotocol.wave.model.wave.data.BlipData;
import org.waveprotocol.wave.model.wave.data.ObservableWaveletData;
import org.waveprotocol.wave.model.wave.data.ReadableWaveletData;
import org.waveprotocol.wave.model.wave.data.WaveletDataListener;
import java.util.Collection;
/**
* Presents a {@link ReadableWaveletData} as a {@link ObservableWaveletData},
* where all mutation methods throw {@link UnsupportedOperationException}.
*
*/
public final class UnmodifiableWaveletData extends ForwardingReadableWaveletData
implements ObservableWaveletData {
/**
* Factory for wrapping {@link ReadableWaveletData}
* as {@link ObservableWaveletData}.
*/
public static class Factory implements ObservableWaveletData.Factory<UnmodifiableWaveletData> {
@Override
public UnmodifiableWaveletData create(ReadableWaveletData data) {
return new UnmodifiableWaveletData(data);
}
}
/** Factory instance. */
public static final UnmodifiableWaveletData.Factory FACTORY = new Factory();
private final ReadableWaveletData data;
private UnmodifiableWaveletData(ReadableWaveletData data) {
this.data = data;
}
@Override
protected ReadableWaveletData delegate() {
return data;
}
@Override
public UnmodifiableBlipData getDocument(String documentName) {
return new UnmodifiableBlipData(data.getDocument(documentName));
}
@Override
public BlipData createDocument(String id, ParticipantId author,
Collection<ParticipantId> contributors, DocInitialization content,
long lastModifiedTime, long lastModifiedVersion) {
throw new UnsupportedOperationException(
"UnmodifiableWaveletData doesn't support createBlip");
}
@Override
public boolean addParticipant(ParticipantId participant) {
throw new UnsupportedOperationException(
"UnmodifiableWaveletData doesn't support addParticipant");
}
@Override
public boolean addParticipant(ParticipantId participant, int position) {
throw new UnsupportedOperationException(
"UnmodifiableWaveletData doesn't support addParticipant");
}
@Override
public boolean removeParticipant(ParticipantId participant) {
throw new UnsupportedOperationException(
"UnmodifiableWaveletData doesn't support removeParticipant");
}
@Override
public long setVersion(long newVersion) {
throw new UnsupportedOperationException(
"UnmodifiableWaveletData doesn't support setVersion");
}
@Override
public HashedVersion setHashedVersion(HashedVersion newHashedVersion) {
throw new UnsupportedOperationException(
"UnmodifiableWaveletData doesn't support setHashedVersion");
}
@Override
public long setLastModifiedTime(long newTime) {
throw new UnsupportedOperationException(
"UnmodifiableWaveletData doesn't support setLastModifiedTime");
}
@Override
public void addListener(WaveletDataListener listener) { } // there's nothing to hear
@Override
public void removeListener(WaveletDataListener listener) { }
}