/**
* 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.supplement;
import org.waveprotocol.wave.model.conversation.ConversationThread;
/**
* A simple {@link PresentationPolicy}.
*
* @author kalman@google.com (Benjamin Kalman)
*/
public final class SimplePresentationPolicy implements PresentationPolicy {
private final ThreadState defaultState;
/**
* Creates a simple presentation policy with a default thread state to return
* in {@link #getThreadState} when none is given.
*
* @param defaultState the default thread state
*/
public SimplePresentationPolicy(ThreadState defaultState) {
this.defaultState = defaultState;
}
@Override
public ThreadState expand(ConversationThread thread, ThreadState current) {
return ThreadState.EXPANDED;
}
@Override
public ThreadState collapse(ConversationThread thread, ThreadState current) {
return ThreadState.COLLAPSED;
}
@Override
public ThreadState getThreadState(ConversationThread thread, ThreadState specified) {
return (specified != null) ? specified : defaultState;
}
}