@Test
public void testOneToManyAssosiation() throws Exception {
MetadataFactory mf = oneToManyRelationMetadata();
Table g1 = mf.getSchema().getTable("G1");
Table g2 = mf.getSchema().getTable("G2");
ForeignKey fk = g2.getForeignKeys().get(0);
assertEquals("one_2_many", fk.getName());
assertNotNull(fk.getColumnByName("e1"));
}
@Test
public void testAssosiationWithReferentialContriant() throws Exception {
ODataMetadataProcessor processor = new ODataMetadataProcessor();
MetadataFactory mf =
new MetadataFactory(
"vdb",
1,
"northwind",
SystemMetadata.getInstance().getRuntimeTypeMap(),
new Properties(),
null);
CsdlEntityType g1Entity = entityType("g1");
g1Entity.getProperties().add(createProperty("g2e2", EdmPrimitiveTypeKind.String));
g1Entity.setKey(Arrays.asList(new CsdlPropertyRef().setName("g2e2")));
CsdlEntityType g2Entity = entityType("g2");
CsdlNavigationProperty navProperty = new CsdlNavigationProperty();
navProperty.setName("one_2_one");
navProperty.setType("namespace.g2");
navProperty.setNullable(false);
navProperty.setPartner("PartnerPath");
navProperty.setReferentialConstraints(
Arrays.asList(
new CsdlReferentialConstraint().setProperty("g2e2").setReferencedProperty("e2")));
g1Entity.setNavigationProperties(Arrays.asList(navProperty));
CsdlEntitySet g1Set = createES("G1", "namespace.g1");
CsdlEntitySet g2Set = createES("G2", "namespace.g2");
CsdlNavigationPropertyBinding navBinding = new CsdlNavigationPropertyBinding();
navBinding.setPath("one_2_one");
navBinding.setTarget("G2");
g1Set.setNavigationPropertyBindings(Arrays.asList(navBinding));
XMLMetadata metadata = buildXmlMetadata(g1Entity, g1Set, g2Entity, g2Set);
processor.getMetadata(mf, metadata);
Table g1 = mf.getSchema().getTable("G1");
Table g2 = mf.getSchema().getTable("G2");
assertNotNull(g1);
assertNotNull(g2);
ForeignKey fk = g2.getForeignKeys().get(0);
assertEquals("one_2_one", fk.getName());
assertNotNull(fk.getColumnByName("e2"));
assertEquals("g2e2", fk.getReferenceColumns().get(0));
}
private static void buildAssosiationSets(MetadataStore metadataStore, List<Builder> edmSchemas) {
for (Schema schema : metadataStore.getSchemaList()) {
EdmSchema.Builder odataSchema = findSchema(edmSchemas, schema.getName());
EdmEntityContainer.Builder entityContainer =
findEntityContainer(edmSchemas, schema.getName());
List<EdmAssociationSet.Builder> assosiationSets = new ArrayList<EdmAssociationSet.Builder>();
List<EdmAssociation.Builder> assosiations = new ArrayList<EdmAssociation.Builder>();
for (Table table : schema.getTables().values()) {
// build Associations
for (ForeignKey fk : table.getForeignKeys()) {
EdmEntitySet.Builder entitySet =
findEntitySet(edmSchemas, schema.getName(), table.getName());
EdmEntitySet.Builder refEntitySet =
findEntitySet(edmSchemas, schema.getName(), fk.getReferenceTableName());
EdmEntityType.Builder entityType =
findEntityType(edmSchemas, schema.getName(), table.getName());
EdmEntityType.Builder refEntityType =
findEntityType(edmSchemas, schema.getName(), fk.getReferenceTableName());
// check to see if fk is part of this table's pk, then it is 1 to 1 relation
boolean onetoone = sameColumnSet(table.getPrimaryKey(), fk);
// Build Association Ends
EdmAssociationEnd.Builder endSelf =
EdmAssociationEnd.newBuilder()
.setRole(table.getName())
.setType(entityType)
.setMultiplicity(onetoone ? EdmMultiplicity.ZERO_TO_ONE : EdmMultiplicity.MANY);
EdmAssociationEnd.Builder endRef =
EdmAssociationEnd.newBuilder()
.setRole(fk.getReferenceTableName())
.setType(refEntityType)
.setMultiplicity(EdmMultiplicity.ZERO_TO_ONE);
// Build Association
EdmAssociation.Builder association = EdmAssociation.newBuilder();
association.setName(table.getName() + "_" + fk.getName());
association.setEnds(endSelf, endRef);
association.setNamespace(
refEntityType
.getFullyQualifiedTypeName()
.substring(0, refEntityType.getFullyQualifiedTypeName().indexOf('.')));
assosiations.add(association);
// Build ReferentialConstraint
if (fk.getReferenceColumns() != null) {
EdmReferentialConstraint.Builder erc = EdmReferentialConstraint.newBuilder();
erc.setPrincipalRole(fk.getReferenceTableName());
erc.addPrincipalReferences(fk.getReferenceColumns());
erc.setDependentRole(table.getName());
erc.addDependentReferences(getColumnNames(fk.getColumns()));
association.setRefConstraint(erc);
}
// Add EdmNavigationProperty to entity type
EdmNavigationProperty.Builder nav =
EdmNavigationProperty.newBuilder(fk.getReferenceTableName());
nav.setRelationshipName(fk.getName());
nav.setFromToName(table.getName(), fk.getReferenceTableName());
nav.setRelationship(association);
nav.setFromTo(endSelf, endRef);
entityType.addNavigationProperties(nav);
// Add EdmNavigationProperty to Reference entity type
EdmNavigationProperty.Builder refNav = EdmNavigationProperty.newBuilder(table.getName());
refNav.setRelationshipName(fk.getName());
refNav.setFromToName(fk.getReferenceTableName(), table.getName());
refNav.setRelationship(association);
refNav.setFromTo(endRef, endSelf);
refEntityType.addNavigationProperties(refNav);
// build AssosiationSet
EdmAssociationSet.Builder assosiationSet =
EdmAssociationSet.newBuilder()
.setName(table.getName() + "_" + fk.getName())
.setAssociationName(fk.getName());
// Build AssosiationSet Ends
EdmAssociationSetEnd.Builder endOne =
EdmAssociationSetEnd.newBuilder()
.setEntitySet(entitySet)
.setRoleName(table.getName())
.setRole(
EdmAssociationEnd.newBuilder()
.setType(entityType)
.setRole(entityType.getName()));
EdmAssociationSetEnd.Builder endTwo =
EdmAssociationSetEnd.newBuilder()
.setEntitySet(refEntitySet)
.setRoleName(fk.getReferenceTableName())
.setRole(
EdmAssociationEnd.newBuilder()
.setType(refEntityType)
.setRole(refEntityType.getName()));
assosiationSet.setEnds(endOne, endTwo);
assosiationSet.setAssociation(association);
assosiationSets.add(assosiationSet);
}
}
entityContainer.addAssociationSets(assosiationSets);
odataSchema.addAssociations(assosiations);
}
}