bundle/src/main/java/com/adobe/acs/commons/functions/CheckedBiFunction.java
/*
* ACS AEM Commons
*
* Copyright (C) 2013 - 2023 Adobe
*
* 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.adobe.acs.commons.functions;
import org.osgi.annotation.versioning.ConsumerType;
/**
* Created work-alike for functionality not introduced until Java 8
* Represents a function that accepts two arguments and produces a result.
* This is the two-arity specialization of Function.
*
* @param <T> the type of the first argument to the function
* @param <U> the type of the second argument to the function
* @param <R> the type of the result of the function
*
*/
@ConsumerType
@FunctionalInterface
@SuppressWarnings("squid:S00112")
public interface CheckedBiFunction<T, U, R> {
static <T,U,R> CheckedBiFunction<T, U, R> from(java.util.function.BiFunction<T,U,R> function) {
return function == null ? null : (t, u) -> function.apply(t, u);
}
/**
* Applies this function to the given arguments.
*
* @param t the first function argument
* @param u the second function argument
* @return the function result
* @throws java.lang.Exception
*/
R apply(T t, U u) throws Exception;
/**
* Returns a composed function that first applies this function to
* its input, and then applies the {@code after} function to the result.
* If evaluation of either function throws an exception, it is relayed to
* the caller of the composed function.
*
* @param <V> the type of output of the {@code after} function, and of the
* composed function
* @param after the function to apply after this function is applied
* @return a composed function that first applies this function and then
* applies the {@code after} function
* @throws NullPointerException if after is null
*/
default <V> CheckedBiFunction<T, U, V> andThen(final CheckedFunction<? super R, ? extends V> after) {
if (after == null) {
throw new NullPointerException();
}
return (T t, U u) -> after.apply(apply(t, u));
}
}