private void putOneToOneAssociation(
Tuple tuple,
Node node,
TupleOperation operation,
TupleContext tupleContext,
Set<String> processedAssociationRoles) {
String associationRole = tupleContext.getTupleTypeContext().getRole(operation.getColumn());
if (!processedAssociationRoles.contains(associationRole)) {
processedAssociationRoles.add(associationRole);
EntityKey targetKey =
getEntityKey(
tuple,
tupleContext
.getTupleTypeContext()
.getAssociatedEntityKeyMetadata(operation.getColumn()));
// delete the previous relationship if there is one; for a to-one association, the
// relationship won't have any
// properties, so the type is uniquely identifying it
Iterator<Relationship> relationships =
node.getRelationships(withName(associationRole)).iterator();
if (relationships.hasNext()) {
relationships.next().delete();
}
// create a new relationship
Node targetNode =
entityQueries
.get(targetKey.getMetadata())
.findEntity(dataBase, targetKey.getColumnValues());
node.createRelationshipTo(targetNode, withName(associationRole));
}
}
private void putProperty(EntityKey entityKey, Node node, TupleOperation operation) {
try {
node.setProperty(operation.getColumn(), operation.getValue());
} catch (ConstraintViolationException e) {
throw log.constraintViolation(entityKey, operation, e);
}
}
private void putProperty(EntityKey entityKey, Node node, TupleOperation operation) {
try {
node.setProperty(operation.getColumn(), operation.getValue());
} catch (ConstraintViolationException e) {
String message = e.getMessage();
if (message.contains("already exists")) {
throw log.mustNotInsertSameEntityTwice(String.valueOf(operation), e);
} else {
throw log.constraintViolation(entityKey, String.valueOf(operation), e);
}
}
}
private void putTupleOperation(
EntityKey entityKey,
Tuple tuple,
Node node,
TupleOperation operation,
TupleContext tupleContext,
Set<String> processedAssociationRoles) {
if (tupleContext.getTupleTypeContext().isPartOfAssociation(operation.getColumn())) {
// the column represents a to-one association, map it as relationship
putOneToOneAssociation(tuple, node, operation, tupleContext, processedAssociationRoles);
} else if (isPartOfRegularEmbedded(
entityKey.getMetadata().getColumnNames(), operation.getColumn())) {
entityQueries
.get(entityKey.getMetadata())
.updateEmbeddedColumn(
dataBase, entityKey.getColumnValues(), operation.getColumn(), operation.getValue());
} else {
putProperty(entityKey, node, operation);
}
}
private void removeTupleOperation(
EntityKey entityKey,
Node node,
TupleOperation operation,
TupleContext tupleContext,
Set<String> processedAssociationRoles) {
if (!tupleContext.getTupleTypeContext().isPartOfAssociation(operation.getColumn())) {
if (isPartOfRegularEmbedded(entityKey.getColumnNames(), operation.getColumn())) {
// Embedded node
String[] split = split(operation.getColumn());
removePropertyForEmbedded(node, split, 0);
} else if (node.hasProperty(operation.getColumn())) {
node.removeProperty(operation.getColumn());
}
}
// if the column represents a to-one association, remove the relationship
else {
String associationRole = tupleContext.getTupleTypeContext().getRole(operation.getColumn());
if (!processedAssociationRoles.contains(associationRole)) {
Iterator<Relationship> relationships =
node.getRelationships(withName(associationRole)).iterator();
if (relationships.hasNext()) {
relationships.next().delete();
}
}
}
}
private void applyOperation(
EntityKey entityKey,
Tuple tuple,
Node node,
TupleOperation operation,
TupleContext tupleContext,
Set<String> processedAssociationRoles) {
switch (operation.getType()) {
case PUT:
putTupleOperation(
entityKey, tuple, node, operation, tupleContext, processedAssociationRoles);
break;
case PUT_NULL:
case REMOVE:
removeTupleOperation(entityKey, node, operation, tupleContext, processedAssociationRoles);
break;
}
}
