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rewriting internal class data page data getter as data getter

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hjkhjk54 2012-02-29 22:21:25 +00:00
parent e959ffb605
commit 2bd515d356
1 changed files with 146 additions and 0 deletions
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src/edu/cornell/mannlib/vitro/webapp/utils/dataGetter/InternalClassesDataGetter.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.utils.dataGetter;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletContext;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.json.JSONObject;
import com.hp.hpl.jena.ontology.OntModel;
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.Model;
import com.hp.hpl.jena.rdf.model.RDFNode;
import com.hp.hpl.jena.rdf.model.ResourceFactory;
import com.hp.hpl.jena.rdf.model.Statement;
import com.hp.hpl.jena.rdf.model.StmtIterator;
import edu.cornell.mannlib.vitro.webapp.beans.Individual;
import edu.cornell.mannlib.vitro.webapp.beans.VClass;
import edu.cornell.mannlib.vitro.webapp.beans.VClassGroup;
import edu.cornell.mannlib.vitro.webapp.controller.VitroRequest;
import edu.cornell.mannlib.vitro.webapp.controller.freemarker.UrlBuilder;
import edu.cornell.mannlib.vitro.webapp.dao.DisplayVocabulary;
import edu.cornell.mannlib.vitro.webapp.dao.PageDao;
import edu.cornell.mannlib.vitro.webapp.dao.VitroVocabulary;
import edu.cornell.mannlib.vitro.webapp.dao.jena.VClassGroupCache;
import edu.cornell.mannlib.vitro.webapp.web.templatemodels.VClassGroupTemplateModel;
import edu.cornell.mannlib.vitro.webapp.dao.jena.ModelContext;
import edu.cornell.mannlib.vitro.webapp.utils.dataGetter.IndividualsForClassesDataGetter;
/**
* This will pass these variables to the template:
* classGroupUri: uri of the classgroup associated with this page.
* vClassGroup: a data structure that is the classgroup associated with this page.
*/
public class InternalClassesDataGetter extends IndividualsForClassesDataGetter{
private static final Log log = LogFactory.getLog(InternalClassesDataGetter.class);
/**
* Constructor with display model and data getter URI that will be called by reflection.
*/
public InternalClassesDataGetter(Model displayModel, String dataGetterURI){
super(displayModel, dataGetterURI);
}
//Use different template name for internal class template
@Override
protected void setTemplateName() {
super.restrictClassesTemplateName = "internalClass";
}
//Retrieve classes and check whether or not page to be filtered by internal class only
@Override
protected Map<String, Object> getClassIntersectionsMap(Model displayModel) {
Map<String, Object> classesAndRestrictions = new HashMap<String, Object>();
QuerySolutionMap initialBindings = new QuerySolutionMap();
initialBindings.add("dataGetterUri", ResourceFactory.createResource(this.dataGetterURI));
List<String> classes = new ArrayList<String>();
displayModel.enterCriticalSection(false);
try{
Query individualsForClassesInternalQuery = QueryFactory.create(individualsForClassesInternalQueryString);
QueryExecution qexec = QueryExecutionFactory.create( individualsForClassesInternalQuery, displayModel , initialBindings);
try{
ResultSet resultSet = qexec.execSelect();
while(resultSet.hasNext()){
QuerySolution soln = resultSet.next();
String dg = DataGetterUtils.nodeToString(soln.get("dg"));
classes.add(DataGetterUtils.nodeToString(soln.get("class")));
//node to string will convert null to empty string
String isInternal = DataGetterUtils.nodeToString(soln.get("isInternal"));
if(!isInternal.isEmpty()) {
log.debug("Internal value is "+ isInternal);
//Retrieve and add internal class
classesAndRestrictions.put("isInternal", isInternal);
}
}
if( classes.size() == 0 ){
log.debug("No classes defined in display model for "+ this.dataGetterURI);
return null;
}
classesAndRestrictions.put("classes", classes);
return classesAndRestrictions;
}finally{
qexec.close();
}
}finally{
displayModel.leaveCriticalSection();
}
}
//Retrieve current internal class uri to restrict by
@Override
protected List<String> retrieveRestrictClasses(
ServletContext context, Map<String, Object> classIntersectionsMap) {
List<String> restrictClasses = new ArrayList<String>();
String internalClass = (String) classIntersectionsMap.get("isInternal");
//if internal class restriction specified and is true
if(internalClass != null && internalClass.equals("true")) {
//Get internal class
Model mainModel = ModelContext.getBaseOntModelSelector(context).getTBoxModel();;
StmtIterator internalIt = mainModel.listStatements(null, ResourceFactory.createProperty(VitroVocabulary.IS_INTERNAL_CLASSANNOT), (RDFNode) null);
//Checks for just one statement
if(internalIt.hasNext()){
Statement s = internalIt.nextStatement();
//The class IS an internal class so the subject is what we're looking for
String internalClassUri = s.getSubject().getURI();
log.debug("Found internal class uri " + internalClassUri);
restrictClasses.add(internalClassUri);
}
}
return restrictClasses;
}
@Override
public String getType(){
return DataGetterUtils.generateDataGetterTypeURI(InternalClassesDataGetter.class.getName());
}
static final protected String individualsForClassesInternalQueryString =
DataGetterUtils.prefixes + "\n" +
"SELECT?class ?isInternal WHERE {\n" +
" ?dataGetterUri <" + DisplayVocabulary.GETINDIVIDUALS_FOR_CLASS + "> ?class . \n" +
" OPTIONAL { ?dataGetterUri <"+ DisplayVocabulary.RESTRICT_RESULTS_BY_INTERNAL + "> ?isInternal } .\n" +
"} \n" ;
}