/**
* Copyright 2009 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.conversation;
import org.waveprotocol.wave.model.util.Predicate;
/**
* Mappers for conversations.
*
* @author hearnden@google.com (David Hearnden)
* @see BlipMappers
*/
public final class BlipMappers {
private static final class Exit extends RuntimeException {
public static final Exit INSTANCE = new Exit();
private Exit() {}
}
/**
* A mapper that applies depth-first.
*/
private static class DepthFirst {
private final Predicate<? super ConversationBlip> p;
DepthFirst(Predicate<? super ConversationBlip> p) {
this.p = p;
}
void apply(ConversationView wave) {
for (Conversation conversation : wave.getConversations()) {
apply(conversation);
}
}
void apply(Conversation conversation) {
apply(conversation.getRootThread());
}
void apply(ConversationThread thread) {
for (ConversationBlip blip : thread.getBlips()) {
apply(blip);
}
}
void apply(ConversationBlip blip) {
if (!p.apply(blip)) {
throw Exit.INSTANCE;
}
for (ConversationThread thread : blip.getReplyThreads()) {
apply(thread);
}
}
}
public static void depthFirst(Predicate<? super ConversationBlip> p, ConversationView wave) {
try {
new DepthFirst(p).apply(wave);
} catch (Exit e) {
}
}
public static void depthFirst(Predicate<? super ConversationBlip> p, Conversation conversation) {
try {
new DepthFirst(p).apply(conversation);
} catch (Exit e) {
}
}
public static void depthFirst(Predicate<? super ConversationBlip> p, ConversationThread thread) {
try {
new DepthFirst(p).apply(thread);
} catch (Exit e) {
}
}
public static void depthFirst(Predicate<? super ConversationBlip> p, ConversationBlip blip) {
try {
new DepthFirst(p).apply(blip);
} catch (Exit e) {
}
}
}