Functor.java

/***************************************************************************
 * Copyright (c) 2012-2013 VMware, Inc. All Rights Reserved.
 * 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.vmware.bdd.utils;

/**
 * Functor utilities
 */
public class Functor {
   public interface Predicate<T> {
      boolean evaluate(T object);
   }

   public static <T> Predicate<T> negate(final Predicate<T> f) {
      return new Predicate<T>() {
         @Override
         public boolean evaluate(T object) {
            return !f.evaluate(object);
         }
      };
   }
}