all files / src/ast/ OpMatches.js

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/*
 * Copyright 2002-2019 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
 *
 *      https://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';
 
/**
 * Implements the matches operator. Matches takes two operands:
 * The first is a String and the second is a Java regex.
 * It will return {@code true} when {@link #getValue} is called
 * if the first operand matches the regex.
 *
 * @author Andy Clement
 * @author Juergen Hoeller
 * @author Chris Thielen
 * @since 3.0
 */
function createNode(position, left, right) {
  var node = SpelNode.create('matches', position, left, right);
 
  /**
   * Check the first operand matches the regex specified as the second operand.
   * @param state the expression state
   * @return {@code true} if the first operand matches the regex specified as the
   * second operand, otherwise {@code false}
   * @throws EvaluationException if there is a problem evaluating the expression
   * (e.g. the regex is invalid)
   */
  node.getValue = function (state) {
    var data = left.getValue(state);
    var regexpString = right.getValue(state);
 
    try {
      var regexp = new RegExp(regexpString);
      return !!regexp.exec(data);
    } catch (error) {
      throw {
        name: 'EvaluationException',
        message: error.toString(),
      };
    }
  };
 
  return node;
}
 
export var OpMatches = {
  create: createNode,
};