Examples of de.fuberlin.wiwiss.d2rq.algebra.NodeRelation

de.fuberlin.wiwiss.d2rq.algebra.NodeRelation
A {@link Relation} associated with a number of named {@link NodeMaker}s. TODO: This is really just a Relation and a BindingMaker wrapped into one. Refactor as such? @author Richard Cyganiak (richard@cyganiak.de)

  public void testConstraintInTripleNoMatch() {
    assertNull(translate1("?x rdf:type ?x", "engine/type-bridge.n3"));
  }
  
  public void testConstraintInTripleMatch() {
    NodeRelation nodeRel = translate1("?x rdf:type ?x", "engine/object-uricolumn.n3");
    Relation r = nodeRel.baseRelation();
    assertEquals(Collections.singleton(table1), r.tables());
    assertTrue(r.condition() instanceof Equality);  // Too lazy to check both sides
    assertEquals(AliasMap.NO_ALIASES, r.aliases());
    assertEquals(Collections.singleton(x), nodeRel.variables());
  }

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  {
    List<Triple> pattern = new ArrayList<Triple>();
    pattern.add(Triple.create(Node.createVariable("s"), RDFS.label.asNode(), Node.createVariable("o")));
    NodeRelation[] rels = translate(pattern, "optimizer/filtertests.n3");
    
    NodeRelation label_fr_be = search("table1", "label_fr_be", rels);
    NodeRelation label_en = search("table1", "label_en", rels);
    NodeRelation label = search("table1", "label", rels);
    
    Expr filterFR    = new E_LangMatches(new E_Lang(new ExprVar("o")), NodeValue.makeString("fr"));
    Expr filterEN    = new E_LangMatches(new E_Lang(new ExprVar("o")), NodeValue.makeString("en"));
    Expr filterFR_BE = new E_LangMatches(new E_Lang(new ExprVar("o")), NodeValue.makeString("fr-BE"));
    Expr filterALL   = new E_LangMatches(new E_Lang(new ExprVar("o")), NodeValue.makeString("*"));

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  {
    List<Triple> pattern = new ArrayList<Triple>();
    pattern.add(Triple.create(Node.createVariable("s"), RDFS.label.asNode(), Node.createVariable("o")));
    NodeRelation[] rels = translate(pattern, "optimizer/filtertests.n3");
        
    NodeRelation label = search("table1", "label", rels);
    NodeRelation label_en = search("table1", "label_en", rels);
    
    pattern.clear();
    pattern.add(Triple.create(Node.createVariable("s"), Node.createURI("http://example.org/value"), Node.createVariable("o")));
    rels = translate(pattern, "optimizer/filtertests.n3");
    
    NodeRelation intvalue = search("table2", "intvalue", rels);
    
    Expr subject = new E_IsLiteral(new ExprVar("s"));
    Expr object  = new E_IsLiteral(new ExprVar("o"));
    
    assertEquals("ISLITERAL(literal) should be TRUE",      Expression.TRUE,  TransformExprToSQLApplyer.convert(object, label));

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  {
    List<Triple> pattern = new ArrayList<Triple>();
    pattern.add(Triple.create(Node.createVariable("s"), RDFS.label.asNode(), Node.createVariable("o")));
    NodeRelation[] rels = translate(pattern, "optimizer/filtertests.n3");
        
    NodeRelation label = search("table1", "label", rels);
    NodeRelation label_en = search("table1", "label_en", rels);
    
    pattern.clear();
    pattern.add(Triple.create(Node.createVariable("s"), Node.createURI("http://example.org/value"), Node.createVariable("o")));
    rels = translate(pattern, "optimizer/filtertests.n3");
    
    NodeRelation intvalue = search("table2", "intvalue", rels);
    
    Expr subject = new E_IsIRI(new ExprVar("s"));
    Expr object  = new E_IsIRI(new ExprVar("o"));
    
    assertEquals("ISIRI(literal) should be FALSE",      Expression.FALSE, TransformExprToSQLApplyer.convert(object, label));

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    NodeRelation[] rels = translate("?s ?p ?o", "engine/simple.n3");
    assertEquals(2, rels.length);
  }


  public void testMatchOneOfTwoPropertyBridges() {
    NodeRelation nodeRel = translate1(
        "ex:res1 rdf:type ex:Class1",
        "engine/simple.n3");
    Relation r = nodeRel.baseRelation();
    assertEquals(Collections.EMPTY_SET, r.projections());
    assertEquals(Equality.createAttributeValue(table1id, "1"), r.condition());
  }

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  {
    List<Triple> pattern = new ArrayList<Triple>();
    pattern.add(Triple.create(Node.createVariable("s"), RDFS.label.asNode(), Node.createVariable("o")));
    NodeRelation[] rels = translate(pattern, "optimizer/filtertests.n3");
        
    NodeRelation label = search("table1", "label", rels);
    NodeRelation label_en = search("table1", "label_en", rels);
    
    pattern.clear();
    pattern.add(Triple.create(Node.createVariable("s"), Node.createURI("http://example.org/value"), Node.createVariable("o")));
    rels = translate(pattern, "optimizer/filtertests.n3");
    
    NodeRelation intvalue = search("table2", "intvalue", rels);
    
    Expr subject = new E_IsBlank(new ExprVar("s"));
    Expr object  = new E_IsBlank(new ExprVar("o"));
    
    assertEquals("ISBLANK(literal) should be FALSE",      Expression.FALSE, TransformExprToSQLApplyer.convert(object, label));

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  {
    List<Triple> pattern = new ArrayList<Triple>();
    pattern.add(Triple.create(Node.createVariable("s"), Node.createURI("http://example.org/value"), Node.createVariable("o")));
    NodeRelation[] rels = translate(pattern, "optimizer/filtertests.n3");
    
    NodeRelation intvalue = search("table2", "intvalue", rels);
    NodeRelation value = search("table2", "value", rels);
    
    pattern.clear();
    pattern.add(Triple.create(Node.createVariable("s"), RDFS.label.asNode(), Node.createVariable("o")));
    rels = translate(pattern, "optimizer/filtertests.n3");
    
    NodeRelation langliteral = search("table1", "label_en", rels);
    
    Expr filterint    = new E_Equals(new E_Datatype(new ExprVar("o")), NodeValueNode.makeNode(Node.createURI(XSDDatatype.XSDint.getURI())));
    Expr filterstring = new E_Equals(new E_Datatype(new ExprVar("o")), NodeValueNode.makeNode(Node.createURI(XSDDatatype.XSDstring.getURI())));
    
    assertEquals("DATATYPE(intliteral) = xsd:int should be TRUE",       Expression.TRUE, TransformExprToSQLApplyer.convert(filterint, intvalue));

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        "ex:res1 rdf:type ex:Class1 . ex:res1 rdf:type ex:Class2",
        "engine/simple.n3"));
  }
  
  public void testAskTwoTriplePatternsMatch() {
    NodeRelation nodeRel = translate1(
        "ex:res1 rdf:type ex:Class1 . ex:res1 ex:foo ?foo",
        "engine/simple.n3");
    assertEquals(Collections.singleton(foo), nodeRel.variables());
    assertEquals("Literal(Column(T2_table1.foo))", nodeRel.nodeMaker(foo).toString());
    Relation r = nodeRel.baseRelation();
    assertEquals("Conjunction(" +
        "Equality(" +
            "AttributeExpr(@@T1_table1.id@@), " +
            "Constant(1@T1_table1.id)), " +
        "Equality(" +

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  {
    List<Triple> pattern = new ArrayList<Triple>();
    pattern.add(Triple.create(Node.createVariable("s"), Node.createURI("http://example.org/value"), Node.createVariable("o")));
    NodeRelation[] rels = translate(pattern, "optimizer/filtertests.n3");
    
    NodeRelation intvalue = search("table2", "intvalue", rels);
  
    Expr disjunction = new E_LogicalOr(new E_Equals(new ExprVar("o"),  NodeValue.makeNode("1", XSDDatatype.XSDint)), new E_Equals(new ExprVar("o"), NodeValue.makeNode("2", XSDDatatype.XSDint)));
    
    Expression result = TransformExprToSQLApplyer.convert(disjunction, intvalue);
    TypedNodeMaker nm = (TypedNodeMaker) intvalue.nodeMaker(Var.alloc("o"));
    Expression e1 = nm.valueMaker().valueExpression("1");
    Expression e2 = nm.valueMaker().valueExpression("2");
    Expression expected = e1.or(e2);
    
    assertEquals("?o = \"1\"^^xsd:int || ?o = \"2\"^^xsd:int", expected, result);

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  {
    List<Triple> pattern = new ArrayList<Triple>();
    pattern.add(Triple.create(Node.createVariable("s"), Node.createURI("http://example.org/value"), Node.createVariable("o")));
    NodeRelation[] rels = translate(pattern, "optimizer/filtertests.n3");
    
    NodeRelation intvalue = search("table2", "intvalue", rels);
  
    Expr sameTerm = new E_SameTerm(new ExprVar("o"),  NodeValue.makeNode("1", XSDDatatype.XSDint));
    
    Expression result = TransformExprToSQLApplyer.convert(sameTerm, intvalue);
    TypedNodeMaker nm = (TypedNodeMaker) intvalue.nodeMaker(Var.alloc("o"));
    Expression expected = nm.valueMaker().valueExpression("1");
    
    assertEquals("sameTerm(?o, \"1\"^^xsd:int)", expected, result);
    
    sameTerm = new E_SameTerm(new ExprVar("o"),  NodeValue.makeNode("1", XSDDatatype.XSDdecimal));

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