com.arangodb.shaded.vertx.core.impl.future.SucceededFuture Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2019 Contributors to the Eclipse Foundation
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
* which is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
*/
package com.arangodb.shaded.vertx.core.impl.future;
import com.arangodb.shaded.vertx.core.AsyncResult;
import com.arangodb.shaded.vertx.core.Future;
import com.arangodb.shaded.vertx.core.Handler;
import com.arangodb.shaded.vertx.core.impl.ContextInternal;
import java.util.Objects;
import java.util.function.Function;
/**
* Succeeded future implementation.
*
* @author Julien Viet
*/
public final class SucceededFuture extends FutureBase {
/**
* Stateless instance of empty results that can be shared safely.
*/
public static final SucceededFuture EMPTY = new SucceededFuture(null, null);
private final T result;
/**
* Create a future that has already succeeded
* @param result the result
*/
public SucceededFuture(T result) {
this(null, result);
}
/**
* Create a future that has already succeeded
* @param context the context
* @param result the result
*/
public SucceededFuture(ContextInternal context, T result) {
super(context);
this.result = result;
}
@Override
public boolean isComplete() {
return true;
}
@Override
public Future onSuccess(Handler handler) {
if (context != null) {
context.emit(result, handler);
} else {
handler.handle(result);
}
return this;
}
@Override
public Future onFailure(Handler handler) {
return this;
}
@Override
public Future onComplete(Handler> handler) {
if (handler instanceof Listener) {
emitSuccess(result ,(Listener) handler);
} else if (context != null) {
context.emit(this, handler);
} else {
handler.handle(this);
}
return this;
}
@Override
public void addListener(Listener listener) {
emitSuccess(result ,listener);
}
@Override
public T result() {
return result;
}
@Override
public Throwable cause() {
return null;
}
@Override
public boolean succeeded() {
return true;
}
@Override
public boolean failed() {
return false;
}
@Override
public Future map(V value) {
return new SucceededFuture<>(context, value);
}
@Override
public Future otherwise(Function mapper) {
Objects.requireNonNull(mapper, "No null mapper accepted");
return this;
}
@Override
public Future otherwise(T value) {
return this;
}
@Override
public String toString() {
return "Future{result=" + result + "}";
}
}