Examples with RDFNode org.apache.jena.rdf.model.RDFNode used on opensource projects

Example 36 with RDFNode

use of org.apache.jena.rdf.model.RDFNode in project jena by apache.

the class QueryExecUtils method getExactlyOne.

/**
     * Execute, expecting the result to be one row, one column. Return that one
     * RDFNode or throw an exception
     */
public static RDFNode getExactlyOne(QueryExecution qExec, String varname) {
    try {
        ResultSet rs = qExec.execSelect();
        if (!rs.hasNext())
            throw new ARQException("Not found: var ?" + varname);
        QuerySolution qs = rs.nextSolution();
        RDFNode r = qs.get(varname);
        if (rs.hasNext())
            throw new ARQException("More than one: var ?" + varname);
        return r;
    } finally {
        qExec.close();
    }
}

Example 37 with RDFNode

use of org.apache.jena.rdf.model.RDFNode in project jena by apache.

the class QueryExecUtils method getOne.

/**
     * Execute, expecting the result to be one row, one column. Return that one
     * RDFNode or null Throw excpetion if more than one.
     */
public static RDFNode getOne(QueryExecution qExec, String varname) {
    try {
        ResultSet rs = qExec.execSelect();
        if (!rs.hasNext())
            return null;
        QuerySolution qs = rs.nextSolution();
        RDFNode r = qs.get(varname);
        if (rs.hasNext()) {
            QuerySolution qs2 = rs.next();
            RDFNode r2 = qs2.get(varname);
            if (rs.hasNext())
                throw new ARQException("More than one: var ?" + varname + " -> " + r + ", " + r2 + ", ...");
            else
                throw new ARQException("Found two matches: var ?" + varname + " -> " + r + ", " + r2);
        }
        return r;
    } finally {
        qExec.close();
    }
}

Example 38 with RDFNode

use of org.apache.jena.rdf.model.RDFNode in project jena by apache.

the class SecuredRDFNodeImpl method as.

@SuppressWarnings("unchecked")
@Override
public <T extends RDFNode> T as(final Class<T> view) throws ReadDeniedException, AuthenticationRequiredException, SecuredUnsupportedPolymorphismException {
    checkRead();
    // see if the base Item can as
    T baseAs = holder.getBaseItem().as(view);
    if (view.equals(SecuredRDFNodeImpl.class) || view.equals(RDFNode.class)) {
        return (T) this;
    }
    final Method m = getConstructor(view);
    if (m == null) {
        throw new SecuredUnsupportedPolymorphismException(this, view);
    }
    try {
        return (T) m.invoke(null, securedModel, baseAs);
    } catch (final UnsupportedPolymorphismException e) {
        throw new SecuredUnsupportedPolymorphismException(this, view);
    } catch (final IllegalArgumentException e) {
        throw new RuntimeException(e);
    } catch (final IllegalAccessException e) {
        throw new RuntimeException(e);
    } catch (final InvocationTargetException e) {
        throw new RuntimeException(e);
    }
}

Example 39 with RDFNode

use of org.apache.jena.rdf.model.RDFNode in project jena by apache.

the class SpatialIndexLuceneAssembler method open.

/*
    <#index> a :SpatialIndexLucene ;
        #spatial:directory "mem" ;
        spatial:directory <file:DIR> ;
        spatial:definition <#definition> ;
        .
    */
@SuppressWarnings("resource")
@Override
public SpatialIndex open(Assembler a, Resource root, Mode mode) {
    try {
        if (!GraphUtils.exactlyOneProperty(root, pDirectory))
            throw new SpatialIndexException("No 'spatial:directory' property on " + root);
        Directory directory;
        RDFNode n = root.getProperty(pDirectory).getObject();
        if (n.isLiteral()) {
            if (!"mem".equals(n.asLiteral().getLexicalForm()))
                throw new SpatialIndexException("No 'spatial:directory' property on " + root + " is a literal and not \"mem\"");
            directory = new RAMDirectory();
        } else {
            Resource x = n.asResource();
            String path = IRILib.IRIToFilename(x.getURI());
            File dir = new File(path);
            directory = FSDirectory.open(dir.toPath());
        }
        Resource r = GraphUtils.getResourceValue(root, pDefinition);
        EntityDefinition docDef = (EntityDefinition) a.open(r);
        return SpatialDatasetFactory.createLuceneIndex(directory, docDef);
    } catch (IOException e) {
        IO.exception(e);
        return null;
    }
}

Example 40 with RDFNode

use of org.apache.jena.rdf.model.RDFNode in project jena by apache.

the class AbstractTestModel method testCreateLiteralFromNode.

public void testCreateLiteralFromNode() {
    RDFNode S = model.getRDFNode(NodeCreateUtils.create("42"));
    assertInstanceOf(Literal.class, S);
    assertEquals("42", ((Literal) S).getLexicalForm());
}