edu.lternet.pasta.client.SubscriptionUtility.java Source code

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Here is the source code for edu.lternet.pasta.client.SubscriptionUtility.java

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/*
 *
 * $Date$
 * $Author$
 * $Revision$
 *
 * Copyright 2011,2012 the University of New Mexico.
 *
 * This work was supported by National Science Foundation Cooperative
 * Agreements #DEB-0832652 and #DEB-0936498.
 *
 * 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 edu.lternet.pasta.client;

import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.text.ParseException;

import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import org.apache.log4j.Logger;
import org.apache.commons.io.FileUtils;

import edu.lternet.pasta.portal.ConfigurationListener;

/**
 * @author servilla
 * @since Apr 6, 2012
 * 
 *        The QualtyReportUtility class provides utility methods for managing
 *        PASTA quality reports, including converting from xml to html.
 * 
 */
public class SubscriptionUtility {

    /*
     * Class variables
     */

    private static final Logger logger = Logger.getLogger(edu.lternet.pasta.client.SubscriptionUtility.class);

    /*
     * Instance variables
     */

    String subscription = null;

    /*
     * Constructors
     */

    /**
     * Constructs a new QualityReportUtility object from the quality report XML.
     * 
     * @param qr
     *          The quality report XML as a String object.
     * 
     * @throws ParseException
     */
    public SubscriptionUtility(String subscription) throws ParseException {

        if (subscription == null || subscription.isEmpty()) {
            throw new ParseException("Subscription is empty", 0);
        }

        this.subscription = subscription;

    }

    /*
     * Methods
     */

    /**
     * Transforms a quality report XML document to an HTML table.
     * 
     * @param xslPath
     *          The path to the quality report XSL stylesheet.
     * 
     * @return The HTML table as a String object.
     */
    public String xmlToHtml(String xslPath) {

        String html = null;

        File styleSheet = new File(xslPath);

        StringReader stringReader = new StringReader(this.subscription);
        StringWriter stringWriter = new StringWriter();
        StreamSource styleSource = new StreamSource(styleSheet);
        Result result = new StreamResult(stringWriter);
        Source source = new StreamSource(stringReader);

        try {
            Transformer t = TransformerFactory.newInstance().newTransformer(styleSource);
            t.transform(source, result);
            html = stringWriter.toString();
        } catch (TransformerConfigurationException e) {
            logger.error(e.getMessage());
            e.printStackTrace();
        } catch (TransformerFactoryConfigurationError e) {
            logger.error(e.getMessage());
            e.printStackTrace();
        } catch (TransformerException e) {
            logger.error(e.getMessage());
            e.printStackTrace();
        }

        return html;

    }

}