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Adding MenuDao.java, MenuDaoJena.java, MenuDaoJenaTest.java and menuForTest.n3

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bdc34 2010-11-23 21:25:33 +00:00
parent 6fe5ac59a9
commit e20e2af6c6
4 changed files with 274 additions and 0 deletions
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webapp/src/edu/cornell/mannlib/vitro/webapp/dao/MenuDao.java Normal file
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/* $This file is distributed under the terms of the license in /doc/license.txt$ */
package edu.cornell.mannlib.vitro.webapp.dao;
import edu.cornell.mannlib.vitro.webapp.web.templatemodels.menu.Menu;
public interface MenuDao {
public Menu getMenu(String uri);
}

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webapp/src/edu/cornell/mannlib/vitro/webapp/dao/jena/MenuDaoJena.java Normal file
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/* $This file is distributed under the terms of the license in /doc/license.txt$ */
package edu.cornell.mannlib.vitro.webapp.dao.jena;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.hp.hpl.jena.query.Query;
import com.hp.hpl.jena.query.QueryExecution;
import com.hp.hpl.jena.query.QueryExecutionFactory;
import com.hp.hpl.jena.query.QueryFactory;
import com.hp.hpl.jena.query.QuerySolution;
import com.hp.hpl.jena.query.QuerySolutionMap;
import com.hp.hpl.jena.query.ResultSet;
import com.hp.hpl.jena.rdf.model.Literal;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ResourceFactory;
import edu.cornell.mannlib.vitro.webapp.dao.MenuDao;
import edu.cornell.mannlib.vitro.webapp.dao.VitroVocabulary;
import edu.cornell.mannlib.vitro.webapp.web.templatemodels.menu.Menu;
public class MenuDaoJena extends JenaBaseDao implements MenuDao {
private static final Log log = LogFactory.getLog(MenuDaoJena.class);
static final String prefixes =
"PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> \n" +
"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> \n" +
"PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> \n" +
"PREFIX display: <" + VitroVocabulary.DISPLAY +"> \n";
static final protected String menuQueryString =
prefixes + "\n" +
"SELECT ?menuItem ?linkText ?urlMapping WHERE {\n" +
// " GRAPH ?g{\n"+
" ?menu rdf:type display:Menu .\n"+
" ?menu display:hasElement ?menuItem . \n"+
" OPTIONAL { ?menuItem display:linkText ?linkText }.\n"+
" OPTIONAL { ?menuItem display:menuPosition ?menuPosition }.\n"+
" OPTIONAL { ?menuItem display:toPage ?page . }\n"+
" OPTIONAL { ?page display:urlMapping ?urlMapping . }\n"+
// " }\n"+
"} \n" +
"ORDER BY ?menuPosition ?menuItemText \n";
static{
try{
menuQuery=QueryFactory.create(menuQueryString);
}catch(Throwable th){
log.error("could not create SPARQL query for menuQueryString " + th.getMessage());
log.error(menuQueryString);
}
}
static protected Query menuQuery;
public MenuDaoJena(WebappDaoFactoryJena wadf) {
super(wadf);
}
@Override
public Menu getMenu(String uri) {
return getMenu(uri, getOntModelSelector().getDisplayModel());
}
protected Menu getMenu(String uri, Model displayModel){
//setup query parameters
QuerySolutionMap initialBindings = new QuerySolutionMap();
initialBindings.add("menu", ResourceFactory.createResource(uri));
//run SPARQL query to get menu and menu items
QueryExecution qexec = QueryExecutionFactory.create(menuQuery,displayModel,initialBindings );
try{
Menu menu = new Menu();
ResultSet results =qexec.execSelect();
for( ; results.hasNext();){
QuerySolution soln = results.nextSolution();
Literal itemText = soln.getLiteral("linkText");
Literal itemLink = soln.getLiteral("urlMapping");
String text = itemText != null ? itemText.getLexicalForm():"(undefined text)";
String link = itemLink != null ? itemLink.getLexicalForm():"undefinedLink";
menu.addItem(text,link);
}
return menu;
}catch(Throwable th){
log.error(th,th);
return new Menu();
}
}
}