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NIHVIVO-1363 Clean up logic for creating the Dataset to run the query against.

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This commit is contained in:
jeb228 2010-12-13 21:58:50 +00:00
parent d464426554
commit 6a52b1c1f2
1 changed files with 61 additions and 32 deletions
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93
webapp/src/edu/cornell/mannlib/vitro/webapp/controller/SparqlQueryServlet.java
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@ -7,10 +7,12 @@ import java.io.OutputStream;
import java.io.Writer;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
@ -137,42 +139,69 @@ public class SparqlQueryServlet extends BaseEditController {
return;
}
DataSource dataSource = DatasetFactory.create() ;
Dataset dataset = null;
ModelMaker maker = (ModelMaker) getServletContext().getAttribute("vitroJenaModelMaker");
Dataset dataset = chooseDatasetForQuery(vreq);
boolean someModelSet = false;
String models[] = request.getParameterValues("sourceModelName");
if( models != null && models.length > 0 ){
OntModel ontModel = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM);
for( String modelName : models ){
Model modelNamed = maker.getModel(modelName);
if( modelNamed != null ){
dataSource.addNamedModel(modelName, modelNamed) ;
// For now, people expect to query these graphs without using
// FROM NAMED, so we'll also add to the background
ontModel.addSubModel(modelNamed);
someModelSet = true;
}
}
if (someModelSet) {
dataSource.setDefaultModel(ontModel);
}
}
if( ! someModelSet ){
dataset = vreq.getDataset();
if(dataset==null){
dataSource.setDefaultModel(model) ;
}
}
executeQuery(response, resultFormatParam, rdfResultFormatParam, queryParam, (dataset != null) ? dataset : dataSource);
executeQuery(response, resultFormatParam, rdfResultFormatParam, queryParam, dataset);
return;
}
private Dataset chooseDatasetForQuery(VitroRequest vreq) {
Map<String, Model> modelMap = getModelsFromRequest(vreq);
if (!modelMap.isEmpty()) {
return buildDataSetFromNamedModels(modelMap);
}
Dataset dataset = vreq.getDataset();
if (dataset != null) {
return dataset;
}
DataSource dataSource = DatasetFactory.create();
dataSource.setDefaultModel(vreq.getJenaOntModel());
return dataSource;
}
private Map<String, Model> getModelsFromRequest(HttpServletRequest request) {
String modelNames[] = request.getParameterValues("sourceModelName");
if ((modelNames != null) && (modelNames.length > 0)) {
return Collections.emptyMap();
}
ModelMaker maker = (ModelMaker) getServletContext().getAttribute(
"vitroJenaModelMaker");
Map<String, Model> map = new HashMap<String, Model>();
for (String modelName : modelNames) {
Model model = maker.getModel(modelName);
if (model != null) {
map.put(modelName, model);
}
}
return map;
}
private Dataset buildDataSetFromNamedModels(Map<String, Model> modelMap) {
DataSource dataSource = DatasetFactory.create();
for (String name : modelMap.keySet()) {
Model model = modelMap.get(name);
dataSource.addNamedModel(name, model);
}
// For now, people expect to query these graphs without using
// FROM NAMED, so we'll also add to the background
OntModel ontModel = ModelFactory
.createOntologyModel(OntModelSpec.OWL_MEM);
for (String name : modelMap.keySet()) {
Model model = modelMap.get(name);
ontModel.addSubModel(model);
}
dataSource.setDefaultModel(ontModel);
return dataSource;
}
private void executeQuery(HttpServletResponse response, String resultFormatParam, String rdfResultFormatParam, String queryParam, Dataset dataset ) throws IOException {
ResultSetFormat rsf = null;