Comparing Workflow XML Between the File System and Repository

If you have a workflow in the repository and a .ffc file on the file system, and you would like to compare the XML contents to see if they are equal, you can use the following Java code:

You will need to be sure that the file flow-charts-5-0.dtd is located in the Java working directory in order to use the code below.

import flux.*;
import flux.repository.RepositoryAdministrator;
import flux.repository.RepositoryIterator;

import org.w3c.dom.Document;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.rmi.NotBoundException;
import java.util.ArrayList;
import java.util.List;


public class CompareWorkflowXML {


    public static void main(String[] args) throws NotBoundException, EngineException, IOException, ParserConfigurationException, SAXException {


        Factory factory = Factory.makeInstance();


        //    Look up the engine at the given host, port, and SSL setting
        Engine engine = Factory.makeInstance().lookupEngine("localhost", 7250, true);


        try {


            //      Edit this to use a valid login for your engine.
            //      If security is not enabled, comment out the line below, as well as the
            //      try / finally block and the logout line.
            engine.login("admin", "admin");


            //      Get the workflow from the repository
            RepositoryAdministrator repoAdmin = engine.getRepositoryAdministrator();
            List<FlowChart> workflows = new ArrayList<FlowChart>();
            RepositoryIterator it = repoAdmin.get("/myworkflow");

            try {
                while (it.hasNext()) {
                    workflows.add(it.next().getFlowChart());
                }
            } finally {
                it.close();
            }


            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            EngineHelper.makeXmlFromFlowCharts(workflows, bos, true);
            bos.close();
            String workflowXml = bos.toString();


            //    Use Java libraries for the XML comparison
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            dbf.setNamespaceAware(true);
            dbf.setCoalescing(true);
            dbf.setIgnoringElementContentWhitespace(true);
            dbf.setIgnoringComments(true);
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc1 = db.parse(new File("/path/to/myworkflow.ffc"));
            doc1.normalizeDocument();
            Document doc2 = db.parse(new ByteArrayInputStream(workflowXml.getBytes()));
            doc2.normalizeDocument();


            System.out.println(doc1.isEqualNode(doc2));
        } finally {
            engine.logout();
        }
    }
}