Implements common projections in-memory given a set of results. Not all NoSQL datastores support projections like SQL min(..), max(..) etc. This class provides support for those that don't.
| Constructor and description |
|---|
ManualProjections
(PersistentEntity entity) |
| Type | Name and description |
|---|---|
int |
countDistinct(java.util.Collection results, java.lang.String property)Counts the number of distinct values |
java.lang.Object |
max(java.util.Collection results, java.lang.String property)Calculates the maximum value of a property |
java.lang.Object |
min(java.util.Collection results, java.lang.String property)Calculates the minimum value of a property |
java.util.List |
property(java.util.Collection results, java.lang.String property)Obtains a properties value from the results |
| Methods inherited from class | Name |
|---|---|
class java.lang.Object |
java.lang.Object#wait(long, int), java.lang.Object#wait(long), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll() |
Counts the number of distinct values
results - The resultsproperty - The propertyCalculates the maximum value of a property
results - The resultsproperty - The property to calculateCalculates the minimum value of a property
results - The resultsproperty - The property to calculateObtains a properties value from the results
results - The resultsproperty - The property