# DataTypeConverter.java

    /*
     * Copyright (c) 2019, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
     *
     * WSO2 Inc. 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.apache.synapse.commons.json.jsonprocessor.utils;

    import org.apache.synapse.commons.json.jsonprocessor.constants.ValidatorConstants;
    import org.apache.synapse.commons.json.jsonprocessor.exceptions.ParserException;

    /**
     * Handle data type conversions for JSON parser.
     */
    public class DataTypeConverter {

        // use without instantiating
        private DataTypeConverter() {
        }

        public static Boolean convertToBoolean(String value) throws ParserException {
            if (value != null && !value.isEmpty()) {
                value = JsonProcessorUtils.replaceEnclosingQuotes(value);
                if (value.equals("true") || value.equals("false")) {
                    return Boolean.parseBoolean(value);
                }
                throw new ParserException("Cannot convert the sting : " + value + " to boolean");
            }
            throw new ParserException("Cannot convert an empty string to boolean");
        }

        public static int convertToInt(String value) throws ParserException {
            if (value != null && !value.isEmpty()) {
                value = JsonProcessorUtils.replaceEnclosingQuotes(value);
                try {
                    return Integer.parseInt(value.trim());
                } catch (NumberFormatException nfe) {
                    throw new ParserException("NumberFormatException: " + nfe.getMessage(), nfe);
                }
            }
            throw new ParserException("Empty value cannot convert to int");
        }

        public static double convertToDouble(String value) throws ParserException {
            if (value != null && !value.isEmpty()) {
                value = JsonProcessorUtils.replaceEnclosingQuotes(value);
                try {
                    return Double.parseDouble(value.trim());
                } catch (NumberFormatException nfe) {
                    throw new ParserException("NumberFormatException: " + nfe.getMessage(), nfe);
                }
            }
            throw new ParserException("Empty value cannot convert to double");
        }
    }