net.sourceforge.jcctray.model.DashboardXmlParser.java Source code

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Here is the source code for net.sourceforge.jcctray.model.DashboardXmlParser.java

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/*******************************************************************************
 *  Copyright 2007 Ketan Padegaonkar http://ketan.padegaonkar.name
 *  
 *  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 net.sourceforge.jcctray.model;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;

import org.apache.commons.digester.Digester;
import org.apache.commons.digester.ObjectCreateRule;
import org.apache.commons.digester.SetNextRule;
import org.apache.commons.digester.SetPropertiesRule;
import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.xml.sax.SAXException;

/**
 * Parses the XML file provided by cruisecontrol and returns an object representation of the status report xml. See <a
 * href="http://confluence.public.thoughtworks.org/display/CI/Multiple+Project+Summary+Reporting+Standard">http://confluence.public.thoughtworks.org/display/CI/Multiple+Project+Summary+Reporting+Standard</a>
 * for more.
 * 
 * @author Ketan Padegaonkar
 */
public class DashboardXmlParser {

    public static DashBoardProjects getProjects(String url, HttpClient client)
            throws HttpException, IOException, SAXException {
        GetMethod method = new GetMethod(url);
        method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
                new DefaultHttpMethodRetryHandler(3, false));
        try {
            int statusCode = client.executeMethod(method);
            if (statusCode != HttpStatus.SC_OK) {
                throw new RuntimeException(
                        ("Could not connect to " + url + ". The server returned a " + statusCode + " status code"));
            }
            return getProjects(method.getResponseBodyAsStream());
        } finally {
            method.releaseConnection();
        }
    }

    public static DashBoardProjects getProjects(Reader reader) throws IOException, SAXException {
        DashBoardProjects projects = (DashBoardProjects) createDigester().parse(reader);
        if (projects == null)
            projects = new DashBoardProjects();
        return projects;
    }

    public static DashBoardProjects getProjects(InputStream inStream) throws IOException, SAXException {
        return getProjects(new InputStreamReader(inStream));
    }

    private static Digester createDigester() {
        Digester digester = new Digester();
        digester.addRule("Projects", new ObjectCreateRule(DashBoardProjects.class));
        digester.addRule("Projects/Project", new ObjectCreateRule(DashBoardProject.class));
        digester.addRule("Projects/Project", new SetPropertiesRule());
        digester.addRule("Projects/Project", new SetNextRule("add"));
        return digester;
    }
}