com.savoirtech.json.rules.impl.RegexMatchingRule.java Source code

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Here is the source code for com.savoirtech.json.rules.impl.RegexMatchingRule.java

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/*
 *  Copyright (c) 2016 Savoir Technologies
 *
 *  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 com.savoirtech.json.rules.impl;

import com.google.gson.JsonElement;

import com.savoirtech.json.model.JsonComparatorRuleSpecification;
import com.savoirtech.json.rules.JsonComparatorRule;
import com.savoirtech.json.JsonComparatorResult;
import com.savoirtech.json.rules.RuleChildComparator;

/**
 * Rule that compares a value against a regular expression.  The value should be a JSON primitive,
 * although objects and arrays are converted to string form and compared.
 *
 * Created by art on 5/10/16.
 */
public class RegexMatchingRule implements JsonComparatorRule {

    @Override
    public JsonComparatorResult compare(String path, JsonElement templateElement, JsonElement actualElement,
            JsonComparatorRuleSpecification specification, RuleChildComparator childComparator) {

        boolean matches;
        String errorMessage = null;
        String errorPath = null;

        String value = this.getStringForComparison(actualElement);

        matches = value.matches(specification.getPattern());

        if (!matches) {
            errorMessage = "value at path " + path + " does not match '" + specification.getPattern() + "': value="
                    + value;
            errorPath = path;
        }

        return new JsonComparatorResult(false, matches, errorMessage, errorPath);
    }

    //========================================
    // Internal Methods
    //========================================

    private String getStringForComparison(JsonElement ele) {
        if (ele.isJsonPrimitive()) {
            return ele.getAsString();
        }

        return ele.toString();
    }
}