Many To One

In this section will be discussed in detail the manyToOne signature, to understand how it works please visit explicit relations wiki page.

The method manyToOne belongs to RelationalJMapper class and it has several signatures that use the NullPointerControl and MappingType enumerations and always return the destination instance. These signatures allow both creation and enrichment of the destination instance.

Creation signatures

The methods described here, allow the creation of the destination instance.

relationalJMapper.manyToOne(source);

Default parameters:

Enumeration	value
NullPointerControl	SOURCE
Destination MappingType	ALL_FIELDS
Source MappingType	ALL_FIELDS

relationalJMapper.manyToOneWithoutControl(source);

Default parameters:

Enumeration	value
NullPointerControl	NOT_ANY
Destination MappingType	ALL_FIELDS
Source MappingType	ALL_FIELDS

relationalJMapper.manyToOne(source, mtSource);

Default parameters:

Enumeration	value
NullPointerControl	SOURCE
Destination MappingType	ALL_FIELDS
Source MappingType	mtSource

relationalJMapper.manyToOne(source, nullPointerControl, mtSource);

Default parameters:

Enumeration	value
NullPointerControl	nullPointerControl
Destination MappingType	ALL_FIELDS
Source MappingType	mtSource

Enrichment signatures

The methods described here, allow the enrichment of the destination instance.

IMPORTANT! the destination instance is directly manipulated, its return is just a convenience

relationalJMapper.manyToOne(destination, source);

Default parameters:

Enumeration	value
NullPointerControl	ALL
Destination MappingType	ALL_FIELDS
Source MappingType	ALL_FIELDS

relationalJMapper.manyToOneWithoutControl(destination, source);

Default parameters:

Enumeration	value
NullPointerControl	NOT_ANY
Destination MappingType	ALL_FIELDS
Source MappingType	ALL_FIELDS

relationalJMapper.manyToOne(destination, source, mtDestination, mtSource);

Default parameters:

Enumeration	value
NullPointerControl	ALL
Destination MappingType	mtDestination
Source MappingType	mtSource

relationalJMapper.manyToOne(destination, source, nullPointerControl, mtDestination, mtSource);

Default parameters:

Enumeration	value
NullPointerControl	nullPointerControl
Destination MappingType	mtDestination
Source MappingType	mtSource