/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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.elasticsearch.common;
/**
* Holds a value that is either:
* a) set implicitly e.g. through some default value
* b) set explicitly e.g. from a user selection
*
* When merging conflicting configuration settings such as
* field mapping settings it is preferable to preserve an explicit
* choice rather than a choice made only made implicitly by defaults.
*
*/
public class Explicit<T> {
private final T value;
private final boolean explicit;
/**
* Create a value with an indication if this was an explicit choice
* @param value a setting value
* @param explicit true if the value passed is a conscious decision, false if using some kind of default
*/
public Explicit(T value, boolean explicit) {
this.value = value;
this.explicit = explicit;
}
public T value() {
return this.value;
}
/**
*
* @return true if the value passed is a conscious decision, false if using some kind of default
*/
public boolean explicit() {
return this.explicit;
}
}