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A general programming library in Java

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/*
 * Copyright (C) 2016 HaiYang Li
 *
 * 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.landawn.abacus.util.function;

import com.landawn.abacus.util.Fn;
import com.landawn.abacus.util.Try;

/**
 * Refer to JDK API documentation at: https://docs.oracle.com/javase/8/docs/api/java/util/function/package-summary.html
 * @since 0.8
 * 
 * @author Haiyang Li
 */
public interface Predicate extends java.util.function.Predicate, Try.Predicate {

    @Override
    boolean test(T value);

    static  Predicate alwaysTrue() {
        return Fn.alwaysTrue();
    }

    static  Predicate alwaysFalse() {
        return Fn.alwaysFalse();
    }

    static  Predicate isNull() {
        return Fn.isNull();
    }

    static  Predicate notNull() {
        return Fn.notNull();
    }

    static  Predicate equal(Object targetRef) {
        return Fn.equal(targetRef);
    }

    static  Predicate notEqual(Object targetRef) {
        return Fn.notEqual(targetRef);
    }

    static > Predicate greaterThan(T targetRef) {
        return Fn.greaterThan(targetRef);
    }

    static > Predicate greaterEqual(T targetRef) {
        return Fn.greaterEqual(targetRef);
    }

    static > Predicate lessThan(T targetRef) {
        return Fn.lessThan(targetRef);
    }

    static > Predicate lessEqual(T targetRef) {
        return Fn.lessEqual(targetRef);
    }
}