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51 lines
1.6 KiB
JavaScript
51 lines
1.6 KiB
JavaScript
/*
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* Copyright 2011 eBay Software Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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var createError = require('raptor-util').createError;
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var operatorsRegExp = /"(?:[^"]|\\")*"|'(?:[^']|\\')*'|\s+(?:and|or|lt|gt|eq|ne|lt|gt|ge|le)\s+/g;
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var replacements = {
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'and': ' && ',
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'or': ' || ',
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'eq': ' === ',
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'ne': ' !== ',
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'lt': ' < ',
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'gt': ' > ',
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'ge': ' >= ',
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'le': ' <= '
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};
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function handleBinaryOperators(str) {
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return str.replace(operatorsRegExp, function (match) {
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return replacements[match.trim()] || match;
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});
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}
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function Expression(expression, replaceSpecialOperators) {
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if (expression == null) {
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throw createError(new Error('expression argument is required'));
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}
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if (replaceSpecialOperators !== false && typeof expression === 'string') {
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expression = handleBinaryOperators(expression);
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}
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this.expression = expression;
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}
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Expression.prototype = {
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getExpression: function () {
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return this.expression;
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},
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toString: function () {
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return this.expression.toString();
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}
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};
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module.exports = Expression; |