Understanding Relationship Mappings

Example 6-4 Query Optimization Using Joining

The following code example illustrates using joining for query optimization.

// Queries for Employee are configured to always join Address 
OneToOneMapping addressMapping = new OneToOneMapping();
addressMapping.setReferenceClass(Address.class);
addressMapping.setAttributeName("address");
addressMapping.useJoining();
addressMapping.privateOwnedRelationship();

Example 6-5 Query Optimization Using Batching

The following code example illustrates using batch for query optimization.

// Queries on Employee are configured to always batch read Address
OneToManyMapping phoneNumbersMapping = new OneToManyMapping();
phoneNumbersMapping.setReferenceClass("PhoneNumber.class")
phoneNumbersMapping.setAttributeName("phones");
phoneNumbersMapping.useBatchReading();
phoneNumbersMapping.privateOwnedRelationship();