ToManyMapProperty (cayenne-doc: Cayenne Documentation 4.2 API)

All Superinterfaces:

ArcProperty, PropertyDescriptor, ToManyProperty
```
public interface ToManyMapProperty
extends ToManyProperty
```
A property representing a map of objects keyed by one of the object properties.

Since:

3.0

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Object getMapKey(Object target)
  Extracts the map key of the target object.
  - Methods inherited from interface org.apache.cayenne.reflect.ArcProperty
    getComplimentaryReverseArc, getComplimentaryReverseDbRelationshipPath, getRelationship, getTargetDescriptor, invalidate, isFault
  - Methods inherited from interface org.apache.cayenne.reflect.PropertyDescriptor
    equals, getName, injectValueHolder, readProperty, readPropertyDirectly, visit, writeProperty, writePropertyDirectly
  - Methods inherited from interface org.apache.cayenne.reflect.ToManyProperty
    addTarget, addTargetDirectly, removeTarget, removeTargetDirectly

- Method Detail
  - getMapKey
```
Object getMapKey(Object target)
          throws PropertyException
```
    Extracts the map key of the target object.
    
    Throws:
    
    PropertyException