/*
* Copyright 2000-2009 JetBrains s.r.o.
*
* 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 com.intellij.util.messages.impl;
import com.intellij.util.messages.MessageBus;
import com.intellij.util.messages.MessageBusConnection;
import com.intellij.util.messages.Topic;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.util.Disposer;
import org.jetbrains.annotations.NotNull;
import java.util.HashMap;
import java.util.Map;
/**
* @author yole
*/
public class MessageListenerList<T> {
private final MessageBus myMessageBus;
private final Topic<T> myTopic;
private final Map<T, MessageBusConnection> myListenerToConnectionMap = new HashMap<T, MessageBusConnection>();
public MessageListenerList(@NotNull MessageBus messageBus, @NotNull Topic<T> topic) {
myTopic = topic;
myMessageBus = messageBus;
}
public void add(@NotNull T listener) {
final MessageBusConnection connection = myMessageBus.connect();
connection.subscribe(myTopic, listener);
myListenerToConnectionMap.put(listener, connection);
}
public void add(@NotNull final T listener, @NotNull Disposable parentDisposable) {
Disposer.register(parentDisposable, new Disposable() {
public void dispose() {
myListenerToConnectionMap.remove(listener);
}
});
final MessageBusConnection connection = myMessageBus.connect(parentDisposable);
connection.subscribe(myTopic, listener);
myListenerToConnectionMap.put(listener, connection);
}
public void remove(@NotNull T listener) {
final MessageBusConnection connection = myListenerToConnectionMap.remove(listener);
if (connection != null) {
connection.disconnect();
}
}
}