kopia lustrzana https://github.com/ryukoposting/Signal-Android
127 wiersze
3.4 KiB
Java
127 wiersze
3.4 KiB
Java
/**
|
|
* Copyright (C) 2014 Open Whisper Systems
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
package org.thoughtcrime.securesms.util;
|
|
|
|
import android.support.annotation.Nullable;
|
|
|
|
import java.util.LinkedList;
|
|
import java.util.List;
|
|
import java.util.concurrent.Callable;
|
|
import java.util.concurrent.ExecutionException;
|
|
import java.util.concurrent.Executor;
|
|
import java.util.concurrent.FutureTask;
|
|
|
|
public class ListenableFutureTask<V> extends FutureTask<V> {
|
|
|
|
private final List<FutureTaskListener<V>> listeners = new LinkedList<>();
|
|
|
|
@Nullable
|
|
private final Object identifier;
|
|
|
|
@Nullable
|
|
private final Executor callbackExecutor;
|
|
|
|
public ListenableFutureTask(Callable<V> callable) {
|
|
this(callable, null);
|
|
}
|
|
|
|
public ListenableFutureTask(Callable<V> callable, @Nullable Object identifier) {
|
|
this(callable, identifier, null);
|
|
}
|
|
|
|
public ListenableFutureTask(Callable<V> callable, @Nullable Object identifier, @Nullable Executor callbackExecutor) {
|
|
super(callable);
|
|
this.identifier = identifier;
|
|
this.callbackExecutor = callbackExecutor;
|
|
}
|
|
|
|
|
|
public ListenableFutureTask(final V result) {
|
|
this(result, null);
|
|
}
|
|
|
|
public ListenableFutureTask(final V result, @Nullable Object identifier) {
|
|
super(new Callable<V>() {
|
|
@Override
|
|
public V call() throws Exception {
|
|
return result;
|
|
}
|
|
});
|
|
this.identifier = identifier;
|
|
this.callbackExecutor = null;
|
|
this.run();
|
|
}
|
|
|
|
public synchronized void addListener(FutureTaskListener<V> listener) {
|
|
if (this.isDone()) {
|
|
callback(listener);
|
|
} else {
|
|
this.listeners.add(listener);
|
|
}
|
|
}
|
|
|
|
public synchronized void removeListener(FutureTaskListener<V> listener) {
|
|
this.listeners.remove(listener);
|
|
}
|
|
|
|
@Override
|
|
protected synchronized void done() {
|
|
callback();
|
|
}
|
|
|
|
private void callback() {
|
|
Runnable callbackRunnable = new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
for (FutureTaskListener<V> listener : listeners) {
|
|
callback(listener);
|
|
}
|
|
}
|
|
};
|
|
|
|
if (callbackExecutor == null) callbackRunnable.run();
|
|
else callbackExecutor.execute(callbackRunnable);
|
|
}
|
|
|
|
private void callback(FutureTaskListener<V> listener) {
|
|
if (listener != null) {
|
|
try {
|
|
listener.onSuccess(get());
|
|
} catch (InterruptedException e) {
|
|
throw new AssertionError(e);
|
|
} catch (ExecutionException e) {
|
|
listener.onFailure(e);
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean equals(Object other) {
|
|
if (other != null && other instanceof ListenableFutureTask && this.identifier != null) {
|
|
return identifier.equals(other);
|
|
} else {
|
|
return super.equals(other);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int hashCode() {
|
|
if (identifier != null) return identifier.hashCode();
|
|
else return super.hashCode();
|
|
}
|
|
}
|