/**
* Copyright 2014 Netflix, Inc.
*
* 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 rx.functions;
/**
* Implements the negation of a predicate.
*
* @param <T>
* The type of the single input parameter.
*/
public class Not<T> implements Func1<T, Boolean> {
private final Func1<? super T, Boolean> predicate;
/**
* Constructs a predicate that returns true for each input that the source
* predicate returns false for and vice versa.
*
* @param predicate
* The source predicate to negate.
*/
public Not(Func1<? super T, Boolean> predicate) {
this.predicate = predicate;
}
@Override
public Boolean call(T param) {
return !predicate.call(param);
}
}