/**
* Copyright 2013 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 com.matthewmitchell.peercoinj.utils;
import java.util.List;
import java.util.concurrent.Executor;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* A simple wrapper around a listener and an executor, with some utility methods.
*/
public class ListenerRegistration<T> {
public final T listener;
public final Executor executor;
public ListenerRegistration(T listener, Executor executor) {
this.listener = checkNotNull(listener);
this.executor = checkNotNull(executor);
}
public static <T> boolean removeFromList(T listener, List<? extends ListenerRegistration<T>> list) {
checkNotNull(listener);
ListenerRegistration<T> item = null;
for (ListenerRegistration<T> registration : list) {
if (registration.listener == listener) {
item = registration;
break;
}
}
if (item != null) {
list.remove(item);
return true;
} else {
return false;
}
}
}