Difference between revisions of "LoadOWLOntologyFromDB"

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m (getOwlModel method name correction)
 
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<code>
 
<code>
Project prj = Project.loadProjectFromFile("/home/pizza_db.pprj",errors);<br />
+
<pre>
OWLModel owlModel = (OWLModel) prj.getKnowledgeBase();<br />
+
    Project prj = Project.loadProjectFromFile("/home/pizza_db.pprj",errors);
...
+
    OWLModel owlModel = (OWLModel) prj.getKnowledgeBase();
 +
</pre>
 
</code><br /><br />
 
</code><br /><br />
  
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     JenaKnowledgeBaseFactory.useStandalone = false;
 
     JenaKnowledgeBaseFactory.useStandalone = false;
 
     Collection errors = new ArrayList();
 
     Collection errors = new ArrayList();
     //the "false" argument means that it won't overide existing tables
+
     //the "false" argument means that it won't overide the existing table
 
     OwlDatabaseCreator creator = new OwlDatabaseCreator(false);
 
     OwlDatabaseCreator creator = new OwlDatabaseCreator(false);
 
     creator.setDriver("com.mysql.jdbc.Driver");
 
     creator.setDriver("com.mysql.jdbc.Driver");
Line 28: Line 29:
 
     try {
 
     try {
 
           creator.create(errors);
 
           creator.create(errors);
           OWLModel owlModel = creator.getOWLModel();
+
           OWLModel owlModel = creator.getOwlModel();
 
     } catch (OntologyLoadException e) {
 
     } catch (OntologyLoadException e) {
 
           e.printStackTrace();
 
           e.printStackTrace();

Latest revision as of 05:03, May 1, 2010

How do I load a Protege-OWL ontology from a Protege database using the API?

Method 1

The simplest way to load a Protege-OWL ontology from a Protege database is to programatically load the project file (.pprj), which already contains all of the necessary database connection information:

    Project prj = Project.loadProjectFromFile("/home/pizza_db.pprj",errors);
    OWLModel owlModel = (OWLModel) prj.getKnowledgeBase();



Method 2

The second method should be used if there is no project file (.pprj) associated with the Protege-OWL database ontology:

    JenaKnowledgeBaseFactory.useStandalone = false;
    Collection errors = new ArrayList();
    //the "false" argument means that it won't overide the existing table
    OwlDatabaseCreator creator = new OwlDatabaseCreator(false);
    creator.setDriver("com.mysql.jdbc.Driver");
    creator.setURL("jdbc:mysql://localhost/protege");
    creator.setUsername("protege");
    creator.setPassword("mypass");
    creator.setTable("tableName");
    try {
          creator.create(errors);
          OWLModel owlModel = creator.getOwlModel();
     } catch (OntologyLoadException e) {	
          e.printStackTrace();
     }
    

The "false" argument to the
OwlDatabaseCreator
class tells it to use an existing database rather than overwrite it.