ManualProjections (Grace Data - 2024.1.0-RC1)

Summary:
Constructor
Method

| Detail:
Constructor
Method

org.grails.datastore.mapping.query.projections.ManualProjections

```
@SuppressWarnings({ "rawtypes", "unchecked" })
public class ManualProjections
extends Object
```
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 Summary

Constructors
Constructor and description
`ManualProjections(PersistentEntity entity)`

Methods Summary

Methods
Type Params	Return Type	Name and description
	`public int`	`countDistinct(Collection results, String property)` Counts the number of distinct values
	`public Collection`	`distinct(Collection results, String property)`
	`public Object`	`max(Collection results, String property)` Calculates the maximum value of a property
	`public Object`	`min(Collection results, String property)` Calculates the minimum value of a property
	`public List`	`property(Collection results, String property)` Obtains a properties value from the results

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class Object`	`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- Constructor Detail
  - public ManualProjections(PersistentEntity entity)
- Method Detail
  - public int countDistinct(Collection results, String property)
    
    Counts the number of distinct values
    Parameters:
    results - The results
    property - The property
    Returns:
    A count of the distinct values
  - public Collection distinct(Collection results, String property)
  - public Object max(Collection results, String property)
    
    Calculates the maximum value of a property
    Parameters:
    results - The results
    property - The property to calculate
    Returns:
    The maximum value or null if there are no results
  - public Object min(Collection results, String property)
    
    Calculates the minimum value of a property
    Parameters:
    results - The results
    property - The property to calculate
    Returns:
    The minimum value or null if there are no results
  - public List property(Collection results, String property)
    
    Obtains a properties value from the results
    Parameters:
    results - The results
    property - The property
    Returns:
    A list of results

Summary:
Constructor
Method

| Detail:
Constructor
Method

Groovy Documentation