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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.commons.lang3.concurrent;
+
+import java.util.Objects;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Proxies to a {@link Future} for subclassing.
+ *
+ * @param <V> The result type returned by this Future's {@link #get()} and {@link #get(long, TimeUnit)} methods.
+ * @since 3.13.0
+ */
+public abstract class AbstractFutureProxy<V> implements Future<V> {
+
+ private final Future<V> future;
+
+ /**
+ * Constructs a new instance.
+ *
+ * @param future the delegate.
+ */
+ public AbstractFutureProxy(final Future<V> future) {
+ this.future = Objects.requireNonNull(future, "future");
+ }
+
+ @Override
+ public boolean cancel(final boolean mayInterruptIfRunning) {
+ return future.cancel(mayInterruptIfRunning);
+ }
+
+ @Override
+ public V get() throws InterruptedException, ExecutionException {
+ return future.get();
+ }
+
+ @Override
+ public V get(final long timeout, final TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
+ return future.get(timeout, unit);
+ }
+
+ /**
+ * Gets the delegate.
+ *
+ * @return the delegate.
+ */
+ public Future<V> getFuture() {
+ return future;
+ }
+
+ @Override
+ public boolean isCancelled() {
+ return future.isCancelled();
+ }
+
+ @Override
+ public boolean isDone() {
+ return future.isDone();
+ }
+
+}