/**
* 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.box.server.persistence.protos;
import com.google.common.collect.ImmutableList;
import org.waveprotocol.box.server.common.CoreWaveletOperationSerializer;
import org.waveprotocol.box.server.persistence.protos.ProtoDeltaStoreData.ProtoTransformedWaveletDelta;
import org.waveprotocol.wave.model.operation.wave.TransformedWaveletDelta;
import org.waveprotocol.wave.model.operation.wave.WaveletOperation;
import org.waveprotocol.wave.model.operation.wave.WaveletOperationContext;
import org.waveprotocol.wave.model.version.HashedVersion;
import org.waveprotocol.wave.model.wave.ParticipantId;
/**
* This class is used to serialize and deserialize {@link TransformedWavelwetDelta}
* and {@link ProtoTransformedWavelwetDelta}
*
* @author tad.glines@gmail.com (Tad Glines)
*/
public class ProtoDeltaStoreDataSerializer {
/**
* Serialize a {@link TransformedWaveletDelta} into a {@link ProtoTransformedWaveletDelta}
*/
public static ProtoTransformedWaveletDelta serialize(TransformedWaveletDelta delta) {
ProtoTransformedWaveletDelta.Builder builder = ProtoTransformedWaveletDelta.newBuilder();
builder.setAuthor(delta.getAuthor().getAddress());
builder.setResultingVersion(
CoreWaveletOperationSerializer.serialize(delta.getResultingVersion()));
builder.setApplicationTimestamp(delta.getApplicationTimestamp());
for (WaveletOperation op : delta) {
builder.addOperation(CoreWaveletOperationSerializer.serialize(op));
}
return builder.build();
}
/**
* Deserialize a {@link ProtoTransformedWaveletDelta} into a {@link TransformedWaveletDelta}
*/
public static TransformedWaveletDelta deserialize(ProtoTransformedWaveletDelta delta) {
long applicationTimestamp = delta.getApplicationTimestamp();
HashedVersion resultingVersion =
CoreWaveletOperationSerializer.deserialize(delta.getResultingVersion());
ParticipantId author = ParticipantId.ofUnsafe(delta.getAuthor());
ImmutableList.Builder<WaveletOperation> operations = ImmutableList.builder();
int numOperations = delta.getOperationCount();
for (int i = 0; i < numOperations; i++) {
WaveletOperationContext context;
if (i == numOperations - 1) {
context = new WaveletOperationContext(author, applicationTimestamp, 1, resultingVersion);
} else {
context = new WaveletOperationContext(author, applicationTimestamp, 1);
}
operations.add(CoreWaveletOperationSerializer.deserialize(delta.getOperation(i), context));
}
return new TransformedWaveletDelta(author, resultingVersion, applicationTimestamp, operations.build());
}
}