/**
* 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.id;
/**
* General wavelet identifier encoder/decoder that decodes both modern and
* legacy serialised identifiers, attempting the former first, and configurably
* encodes to either the modern or legacy serialisation.
*
* @author anorth@google.com (Alex North)
*/
public class DualIdSerialiser implements IdSerialiser {
public static final DualIdSerialiser MODERN = new DualIdSerialiser(true);
public static final DualIdSerialiser LEGACY = new DualIdSerialiser(false);
private final boolean toModern;
/**
* Creates a new serialiser.
*
* @param toModern whether to serialise to modern or legacy form
*/
private DualIdSerialiser(boolean toModern) {
this.toModern = toModern;
}
@Override
public String serialiseWaveId(WaveId id) {
return toModern ? ModernIdSerialiser.INSTANCE.serialiseWaveId(id)
: LegacyIdSerialiser.INSTANCE.serialiseWaveId(id);
}
@Override
public String serialiseWaveletId(WaveletId id) {
return toModern ? ModernIdSerialiser.INSTANCE.serialiseWaveletId(id)
: LegacyIdSerialiser.INSTANCE.serialiseWaveletId(id);
}
@Override
public String serialiseWaveletName(WaveletName name) {
return toModern ? ModernIdSerialiser.INSTANCE.serialiseWaveletName(name)
: LegacyIdSerialiser.INSTANCE.serialiseWaveletName(name);
}
@Override
public WaveId deserialiseWaveId(String serialisedForm) throws InvalidIdException {
try {
return ModernIdSerialiser.INSTANCE.deserialiseWaveId(serialisedForm);
} catch (InvalidIdException e) {
return LegacyIdSerialiser.INSTANCE.deserialiseWaveId(serialisedForm);
}
}
@Override
public WaveletId deserialiseWaveletId(String serialisedForm) throws InvalidIdException {
try {
return ModernIdSerialiser.INSTANCE.deserialiseWaveletId(serialisedForm);
} catch (InvalidIdException e) {
return LegacyIdSerialiser.INSTANCE.deserialiseWaveletId(serialisedForm);
}
}
@Override
public WaveletName deserialiseWaveletName(String serialisedForm) {
try {
return ModernIdSerialiser.INSTANCE.deserialiseWaveletName(serialisedForm);
} catch (InvalidIdException e) {
return LegacyIdSerialiser.INSTANCE.deserialiseWaveletName(serialisedForm);
}
}
}