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Provides common utility functions
/*
* Copyright (c) CQSE GmbH
*
* 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 org.conqat.lib.commons.function;
import java.util.function.Function;
/**
* This interface is the same as {@link Function}, except it allows throwing a checked exception.
*/
@FunctionalInterface
public interface FunctionWithException {
/**
* Applies this function to the given argument.
*
* @param t
* the function argument
* @return the function result
*/
R apply(T t) throws E;
/**
* Returns a function that always returns its input argument.
*
* @param
* the type of the input and output objects to the function
* @return a function that always returns its input argument
*/
static FunctionWithException identity() {
return t -> t;
}
}