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Simple approach to being able to use the Function interface with checked Exceptions.
/*
* *
*
*
* Copyright 2015 Bill Bejeck
*
* 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 bbejeck.nosql.util;
import java.util.Objects;
import java.util.function.Function;
/**
* User: Bill Bejeck
* Date: 3/8/15
* Time: 11:14 PM
*/
@FunctionalInterface
public interface ThrowingFunction<T,R> extends Function<T,R> {
@Override
default R apply(T t){
try{
return applyThrows(t);
}catch (Exception e){
throw new RuntimeException(e);
}
}
default <V> ThrowingFunction<T, V> andThen(ThrowingFunction<? super R, ? extends V> after){
Objects.requireNonNull(after);
try{
return (T t) -> after.apply(apply(t));
}catch (Exception e){
throw new RuntimeException(e);
}
}
default <V> ThrowingFunction<V, R> compose(ThrowingFunction<? super V, ? extends T> before) {
Objects.requireNonNull(before);
try {
return (V v) -> apply(before.apply(v));
}catch (Exception e){
throw new RuntimeException(e);
}
}
R applyThrows(T t) throws Exception;
}
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