/**
* Copyright 2008 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.operation.wave;
import org.waveprotocol.wave.model.wave.ParticipantId;
/**
* Creates operation contexts with no version information.
* Implementers must implement the abstract getParticipantId() and
* currentTimeMillis() methods.
*
*/
public abstract class AbstractWaveletOperationContextFactory
implements WaveletOperationContext.Factory {
/** @return the default operation creator. */
protected abstract ParticipantId getParticipantId();
/** @return the timestamp to use in created contexts. */
protected abstract long currentTimeMillis();
@Override
public WaveletOperationContext createContext() {
return createContext(getParticipantId());
}
@Override
public WaveletOperationContext createContext(ParticipantId creator) {
// NOTE(zdwang): The final version of the operation cannot be determined at
// the time it's created. We can only infer its final version once the
// server acks it. Hence we use a version increment of 0.
return new WaveletOperationContext(creator, currentTimeMillis(), 0L);
}
}