xml file not found exception

[kalyan neeli]

public class Example3 {

String path;

public Example3(){}

  public Example3(String path)
  {
  this.path=path;
   }
  public void getExecute()
  {
 
  try {

      // Load the rule service provider of the reference
      // implementation.
      // Loading this class will automatically register this
      // provider with the provider manager.
      Class.forName( "org.jruleengine.RuleServiceProviderImpl" );

      // Get the rule service provider from the provider manager.
      RuleServiceProvider serviceProvider = RuleServiceProviderManager.getRuleServiceProvider( "org.jruleengine" );

      // get the RuleAdministrator
      RuleAdministrator ruleAdministrator = serviceProvider.getRuleAdministrator();
      System.out.println("\nAdministration API\n");
      System.out.println( "Acquired RuleAdministrator: " + ruleAdministrator );

      // get an input stream to a test XML ruleset
      // This rule execution set is part of the TCK.
      InputStream inStream = new FileInputStream("WebContent\\example3.xml");
      System.out.println("Acquired InputStream to example3.xml: " + inStream );

      // parse the ruleset from the XML document
      RuleExecutionSet res1 = ruleAdministrator.getLocalRuleExecutionSetProvider( null ).createRuleExecutionSet( inStream, null );
      inStream.close();
      System.out.println( "Loaded RuleExecutionSet: " + res1);

      // register the RuleExecutionSet
      String uri = res1.getName();
      ruleAdministrator.registerRuleExecutionSet(uri, res1, null );
      System.out.println( "Bound RuleExecutionSet to URI: " + uri);

      // Get a RuleRuntime and invoke the rule engine.
      System.out.println( "\nRuntime API\n" );

      RuleRuntime ruleRuntime = serviceProvider.getRuleRuntime();
      System.out.println( "Acquired RuleRuntime: " + ruleRuntime );

      // create a StatefulRuleSession
      StatefulRuleSession statefulRuleSession =
              (StatefulRuleSession) ruleRuntime.createRuleSession( uri,
              new HashMap(),
              RuleRuntime.STATEFUL_SESSION_TYPE );

      System.out.println( "Got Stateful Rule Session: " + statefulRuleSession );

      // Add some clauses…
      ArrayList input = new ArrayList();
      input.add(new Clause("Socrate is human"));

      // add an Object to the statefulRuleSession
      statefulRuleSession.addObjects( input );
      System.out.println( "Called addObject on Stateful Rule Session: "
                                              + statefulRuleSession );

      statefulRuleSession.executeRules();
      System.out.println( "Called executeRules" );

      // extract the Objects from the statefulRuleSession
      List results = statefulRuleSession.getObjects();

      System.out.println( "Result of calling getObjects: " +
                                              results.size() + " results." );

      // Loop over the results.
      Iterator itr = results.iterator();
      while(itr.hasNext()) {
              Object obj = itr.next();
              System.out.println("Clause Found: "+obj.toString());
      }

      // release the statefulRuleSession
      statefulRuleSession.release();
      System.out.println( "Released Stateful Rule Session." );
      System.out.println();

    }
    catch (NoClassDefFoundError e) {
      if (e.getMessage().indexOf("Exception") != -1) {
        System.err.println("Error: The Rule Engine Implementation could not be found.");
      }
      else {
        System.err.println("Error: " + e.getMessage());
      }
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }

In jsp page i created an instance of Example3 object. When i run the jsp page i'm getting FileNotFoundException showing message "example3.xml is not found? How to get rid of it? Please help me?

[Philippe Le Berre]

Hi,

Sounds like a path issue. Use a File() object, do checks isExists() and isFile() and then use this File object for the input stream.

--- sample -----
// load the rules
FileInputStream fis = null;
try {
File rulesSrc = new File(rulesDirectory, rulesFile);
System.out.println("Loading rules set from ("+rulesSrc+")");

if (! (rulesSrc.exists() && rulesSrc.isFile()))
throw new IllegalStateException("Couldn't find the rule file ("+rulesSrc.getAbsolutePath()+")");

fis = new FileInputStream(rulesSrc);

// parse the ruleset from the XML document
ruleExecutionSet = ruleAdministrator.getLocalRuleExecutionSetProvider(null).createRuleExecutionSet(fis, null);
System.out.println( "Loaded RuleExecutionSet: " + ruleExecutionSet);
} finally {
if (fis != null) fis.close();
}