pt.webdetails.cdf.dd.util.XPathUtils.java Source code

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Here is the source code for pt.webdetails.cdf.dd.util.XPathUtils.java

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/*!
 * Copyright 2002 - 2015 Webdetails, a Pentaho company. All rights reserved.
 *
 * This software was developed by Webdetails and is provided under the terms
 * of the Mozilla Public License, Version 2.0, or any later version. You may not use
 * this file except in compliance with the license. If you need a copy of the license,
 * please go to http://mozilla.org/MPL/2.0/. The Initial Developer is Webdetails.
 *
 * Software distributed under the Mozilla Public License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. Please refer to
 * the license for the specific language governing your rights and limitations.
 */

package pt.webdetails.cdf.dd.util;

import org.apache.commons.jxpath.JXPathContext;
import org.apache.commons.jxpath.JXPathException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.json.JSONArray;

public class XPathUtils {

    protected static final Log logger = LogFactory.getLog(XPathUtils.class);

    public static String getStringValue(JXPathContext node, String xPath) {

        String value = "";
        try {
            Object val = node.getValue(xPath);
            value = val != null ? val.toString() : value;
        } catch (JXPathException e) {
            // Property not found; Should not be an error
        }

        return value;
    }

    public static boolean exists(JXPathContext node, String xPath) {

        try {
            return ((String) node.getValue(xPath)).length() > 0 ? true : false;

        } catch (JXPathException e) {
            return false;
        }
    }

    public static boolean getBooleanValue(JXPathContext node, String xPath) {

        boolean value = false;
        try {
            value = ((Boolean) node.getValue("boolean(" + xPath + " = \"true\")")).booleanValue();
        } catch (JXPathException e) {
            logger.error(e.getMessage());
        }

        return value;
    }

    public static String getArrayValue(JXPathContext node, String xPath) {

        String value = "";
        try {
            JSONArray values = new JSONArray(node.selectNodes(xPath));
            value = values.toString();
        } catch (JXPathException e) {
            logger.error(e.getMessage());
        }

        return value;
    }

    public static String getValue(JXPathContext node, String xPath) {

        String value = "";
        try {
            value = node.getValue(xPath).toString();
        } catch (JXPathException e) {
            // Property not found; Should not be an error
        }

        return value;
    }
}