Package de.fuberlin.wiwiss.d2rq.algebra

Examples of de.fuberlin.wiwiss.d2rq.algebra.Relation.aliases()

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    NodeRelation nodeRel = translate1("ex:res1 rdf:type ex:Class1", "engine/type-bridge.n3");
    Relation r = nodeRel.baseRelation();
    assertEquals(Collections.singleton(table1), r.tables());
    assertEquals(Collections.EMPTY_SET, r.projections());
    assertEquals(Equality.createAttributeValue(table1id, "1"), r.condition());
    assertEquals(AliasMap.NO_ALIASES, r.aliases());
    assertEquals(Collections.EMPTY_SET, nodeRel.variables());
  }

  public void testFindNoMatch() {
    assertNull(translate1("ex:res1 ex:foo ?foo", "engine/type-bridge.n3"));
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    NodeRelation nodeRel = translate1("ex:res1 rdf:type ?type", "engine/type-bridge.n3");
    Relation r = nodeRel.baseRelation();
    assertEquals(Collections.singleton(table1), r.tables());
    assertEquals(Collections.EMPTY_SET, r.projections());
    assertEquals(Equality.createAttributeValue(table1id, "1"), r.condition());
    assertEquals(AliasMap.NO_ALIASES, r.aliases());
    assertEquals(Collections.singleton(type), nodeRel.variables());
    assertEquals("Fixed(<http://example.org/Class1>)",
        nodeRel.nodeMaker(type).toString());
  }
 
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    NodeRelation nodeRel = translate1("?x rdf:type ex:Class1", "engine/type-bridge.n3");
    Relation r = nodeRel.baseRelation();
    assertEquals(Collections.singleton(table1), r.tables());
    assertEquals(Collections.singleton(table1id), r.projections());
    assertEquals(Expression.TRUE, r.condition());
    assertEquals(AliasMap.NO_ALIASES, r.aliases());
    assertEquals(Collections.singleton(x), nodeRel.variables());
    assertEquals("URI(Pattern(http://example.org/res@@table1.id@@))",
        nodeRel.nodeMaker(x).toString());
  }
 
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  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());
  }

  public void testReturnMultipleMatchesForSingleTriplePattern() {
    NodeRelation[] rels = translate("?s ?p ?o", "engine/simple.n3");
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