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/*
* Copyright (C) 2020 ActiveJ LLC.
*
* 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 io.activej.common.initializer;
import java.util.List;
import java.util.function.Consumer;
import static java.util.Arrays.asList;
/**
* An initializer of some value
*
* Basically, a consumer of some object that should initialize that object
*
* This interface is mostly used to initialize objects that follow create().with() pattern
* which you can find throughout a codebase
*
* @param a type of object to be initialized
*/
@FunctionalInterface
public interface Initializer extends Consumer {
/**
* Combines multiple initializers into a single initializers that
* initializes an object by calling each given serializer in order
*
* @param initializers an array of initializers to be combined into a single initializer
* @param a type of object to be initialized
* @return a combined initializer
*/
@SuppressWarnings({"unchecked", "rawtypes"})
@SafeVarargs
static Initializer combine(Initializer... initializers) {
return combine((List) asList((Initializer[]) initializers));
}
/**
* Combines multiple initializers into a single initializers that
* initializes an object by calling each given serializer in order
*
* @param initializers an iterable of initializers to be combined into a single initializer
* @param a type of object to be initialized
* @return a combined initializer
*/
static Initializer combine(Iterable> initializers) {
return target -> initializers.forEach(initializer -> initializer.accept(target));
}
}