net.e6tech.elements.common.util.lambda.Each Maven / Gradle / Ivy
/*
* Copyright 2017 Futeh Kao
*
* 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 net.e6tech.elements.common.util.lambda;
import java.util.Optional;
/**
* This is for iterating through object but want to keep state during iterating
* Created by futeh.
*/
@SuppressWarnings("unchecked")
public class Each {
private T value;
private U state;
protected Each(T value) {
this.value = value;
}
public static Mutator create() {
Mutator mutator = new Mutator<>();
mutator.each = new Each<>(null);
return mutator;
}
public T get() {
return value;
}
public void set(T value) {
this.value = value;
}
public Optional state() {
return Optional.ofNullable(state);
}
public void state(U state) {
this.state = state;
}
public static class Mutator {
Each each;
public Each each() {
return each;
}
public void setValue(T value) {
each.value = value;
}
}
}