Examples with Graph com.hp.hpl.jena.graph.Graph used on opensource projects

Example 1 with Graph

use of com.hp.hpl.jena.graph.Graph in project goci by EBISPOT.

the class SparqlTemplate method query.

public <T> T query(String sparql, ResultSetMapper<T> rsm, Object... args) {
    sparql = getPrefixString().concat(sparql);
    Graph g = getJenaQueryExecutionService().getDefaultGraph();
    Map<String, Object> bindingMap = new HashMap<String, Object>();
    int i = 0;
    for (Object o : args) {
        String argName = "?_arg" + i++;
        sparql = sparql.replaceFirst("\\?\\?", argName);
        bindingMap.put(argName, o);
    }
    Query q1 = QueryFactory.create(sparql, Syntax.syntaxARQ);
    QuerySolutionMap initialBinding = new QuerySolutionMap();
    for (String argName : bindingMap.keySet()) {
        Object argValue = bindingMap.get(argName);
        RDFNode arg;
        if (argValue instanceof URI) {
            arg = new ResourceImpl(argValue.toString());
        } else {
            arg = getLiteralNode(argValue);
        }
        initialBinding.add(argName, arg);
    }
    ParameterizedSparqlString queryString = new ParameterizedSparqlString(q1.toString(), initialBinding);
    QueryExecution execute = null;
    try {
        execute = getJenaQueryExecutionService().getQueryExecution(g, queryString.asQuery(), false);
        ResultSet results = execute.execSelect();
        return rsm.mapResultSet(results);
    } catch (LodeException e) {
        throw new SparqlQueryException("Failed to execute query '" + sparql + "'", e);
    } finally {
        if (execute != null) {
            execute.close();
            if (g != null) {
                g.close();
            }
        }
    }
}

Example 2 with Graph

use of com.hp.hpl.jena.graph.Graph in project goci by EBISPOT.

the class SparqlTemplate method ask.

public boolean ask(String sparql) {
    sparql = getPrefixString().concat(sparql);
    Graph g = getJenaQueryExecutionService().getDefaultGraph();
    Query q1 = QueryFactory.create(sparql, Syntax.syntaxARQ);
    QueryExecution execute = null;
    try {
        execute = getJenaQueryExecutionService().getQueryExecution(g, q1, false);
        return execute.execAsk();
    } catch (LodeException e) {
        throw new SparqlQueryException("Failed to execute ask '" + sparql + "'", e);
    } finally {
        if (execute != null) {
            execute.close();
            if (g != null) {
                g.close();
            }
        }
    }
}

Example 3 with Graph

use of com.hp.hpl.jena.graph.Graph in project goci by EBISPOT.

the class SparqlTemplate method query.

public <T> T query(String sparql, ResultSetMapper<T> rsm) {
    sparql = getPrefixString().concat(sparql);
    Graph g = getJenaQueryExecutionService().getDefaultGraph();
    Query q1 = QueryFactory.create(sparql, Syntax.syntaxARQ);
    QueryExecution execute = null;
    try {
        execute = getJenaQueryExecutionService().getQueryExecution(g, q1, false);
        ResultSet results = execute.execSelect();
        return rsm.mapResultSet(results);
    } catch (LodeException e) {
        throw new SparqlQueryException("Failed to execute query '" + sparql + "'", e);
    } finally {
        if (execute != null) {
            execute.close();
            if (g != null) {
                g.close();
            }
        }
    }
}