/*
* Copyright 2016 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 aQute.bnd.annotation.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 {@link 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
*
* @see Function
*/
@ConsumerType
@Deprecated
public abstract class BiFunction<T, U, R> implements CheckedBiFunction<T, U, R> {
/**
* 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
*/
public <V> BiFunction<T, U, V> andThen(final Function<? super R, ? extends V> after) {
return adapt(andThen((CheckedFunction) after));
}
public static <X, Y, Z> BiFunction<X, Y, Z> adapt(CheckedBiFunction<X, Y, Z> delegate) {
return new Adapter<>(delegate);
}
private static class Adapter<T, U, R> extends BiFunction<T, U, R> {
final private CheckedBiFunction<T, U, R> delegate;
public Adapter(CheckedBiFunction<T, U, R> delegate) {
this.delegate = delegate;
}
@Override
public R apply(T t, U u) throws Exception {
return delegate.apply(t, u);
}
}
}