com.landawn.abacus.util.function.Function Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of abacus-common Show documentation

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;
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
 * @since 0.8
 *
 * @author Haiyang Li
 */
public interface Function extends Throwables.Function, java.util.function.Function {

    static  Function identity() {
        return Fn.identity();
    }

    @Override
    default  Function compose(java.util.function.Function before) {
        N.checkArgNotNull(before);
        return (V v) -> apply(before.apply(v));
    }

    @Override
    default  Function andThen(java.util.function.Function after) {
        N.checkArgNotNull(after);
        return (T t) -> after.apply(apply(t));
    }

    default  Throwables.Function toThrowable() {
        return (Throwables.Function) this;
    }
}