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Simply utility methods used across other Molindo projects

There is a newer version: 3.0.0

/**
 * Copyright 2010 Molindo GmbH
 *
 * 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 at.molindo.utils.concurrent;

import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import at.molindo.utils.data.Function;

public class FutureUtils {

	private FutureUtils() {
	}

	/**
	 * @return a new {@link Future} that applies the given {@link Function} to
	 *         the value returned by {@link Future#get()} or
	 *         {@link Future#get(long, TimeUnit)} (on every invocation)
	 */
	public static  Future wrap(final Future future, final Function f) {
		return new Future() {

			@Override
			public boolean cancel(boolean mayInterruptIfRunning) {
				return future.cancel(mayInterruptIfRunning);
			}

			@Override
			public boolean isCancelled() {
				return future.isCancelled();
			}

			@Override
			public boolean isDone() {
				return future.isDone();
			}

			@Override
			public T get() throws InterruptedException, ExecutionException {
				return f.apply(future.get());
			}

			@Override
			public T get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
				return f.apply(future.get(timeout, unit));
			}

		};
	}

}