33 Configuring a Relational One-to-Many Mapping
This chapter describes the various components that you must configure in order to use a relational one-to-many mapping.
This chapter includes the following section:
For information on how to configure TopLink mappings options common to two or more mapping types, see Chapter 121, "Configuring a Mapping".
For information on how to create TopLink mappings, see Chapter 120, "Creating a Mapping".
Table 33-1 lists the configurable options for a relational one-to-many mapping.
33.1 Introduction to Relational One-to-Many Mapping Configuration
Table 33-1 lists the configurable options for a relational one-to-many mapping.
Table 33-1 Configurable Options for Relational One-to-Many Mapping
| Option | Oracle JDeveloper |
TopLink Workbench |
Java |
|---|---|---|---|
|
Reference descriptor (see Section 28.4, "Configuring Reference Descriptor") |
 |
|
|
|
Method or direct field access (see Section 121.6, "Configuring Method or Direct Field Accessing at the Mapping Level") |
|
|
|
|
Read-only mapping (see Section 121.2, "Configuring Read-Only Mappings") |
|
|
|
|
Private or Independent relationships (see Section 121.7, "Configuring Private or Independent Relationships") |
|
|
|
|
Batch reading (see Section 28.5, "Configuring Batch Reading") |
|
|
|
|
Indirection (lazy loading) (see Section 121.3, "Configuring Indirection (Lazy Loading)") |
|
|
|
|
Bidirectional relationship (see Section 121.18, "Configuring Bidirectional Relationship") |
|
|
|
|
Container policy (see Section 121.14, "Configuring Container Policy") |
|
|
|
|
Mapping comments (see Section 121.8, "Configuring Mapping Comments") |
|
|
 |
|
Table and field references (see Section 28.7, "Configuring Table and Field References (Foreign and Target Foreign Keys)") |
|
|
|
|
Query key order (see Section 28.6, "Configuring Query Key Order") |
|
|
|
Example 33-1 shows how to create a one-to-many mapping and add it to a descriptor using Java code.
Example 33-1 One-to-Many Mapping
public void customize(ClassDescriptor descriptor) {
OneToManyMapping mapping = new OneToManyMapping();
// configure mapping
...
// add mapping to descriptor
descriptor.addMapping(mapping);
}
For more information, see the following:
For information on using JPA to configure one-to-many mappings, see "@OneToMany" section of EclipseLink Developer's Guide at http://wiki.eclipse.org/Introduction_to_EclipseLink_JPA_%28ELUG%29#.40OneToMany.