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A general programming library in Java/Android. It's easy to learn and simple to use with concise and powerful APIs.

There is a newer version: 5.3.16

/*
 * 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.UnaryOperators;
import com.landawn.abacus.util.N;
import com.landawn.abacus.util.Throwables;

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

    /**
     *
     * @param before
     * @return
     */
    default UnaryOperator compose(java.util.function.UnaryOperator before) {
        N.checkArgNotNull(before);

        return t -> apply(before.apply(t));
    }

    /**
     *
     *
     * @param after
     * @return
     */
    default UnaryOperator andThen(java.util.function.UnaryOperator after) {
        N.checkArgNotNull(after);

        return t -> after.apply(apply(t));
    }

    /**
     * 
     *
     * @param  
     * @return 
     */
    static  UnaryOperator identity() {
        return UnaryOperators.identity();
    }

    /**
     *
     *
     * @param 
     * @return
     */
    @Override
    default  Throwables.UnaryOperator toThrowable() {
        return (Throwables.UnaryOperator) this;
    }
}