src/ast/Elvis.js
/*
* Copyright 2002-2015 the original author or authors.
*
* 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.
*/
import {SpelNode} from './SpelNode';
/**
* Represents the elvis operator ?:. For an expression "a?:b" if a is not null, the value
* of the expression is "a", if a is null then the value of the expression is "b".
*
* @author Andy Clement
* @author Juergen Hoeller
* @author Ben March
* @since 0.2.0
*/
function createNode(position, expression, ifFalse) {
var node = SpelNode.create('elvis', position, expression, ifFalse);
node.getValue = function (state) {
return expression.getValue(state) !== null ? expression.getValue(state) : ifFalse.getValue(state);
};
return node;
}
export var Elvis = {
create: createNode
};