ManualProjections (Grace Data - 2023.3.0)

Summary:
Constructor
Method

| Detail:
Constructor
Method

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

```
@java.lang.SuppressWarnings({ "rawtypes", "unchecked" })
public class ManualProjections
extends java.lang.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(java.util.Collection results, java.lang.String property)` Counts the number of distinct values
	`public java.util.Collection`	`distinct(java.util.Collection results, java.lang.String property)`
	`public java.lang.Object`	`max(java.util.Collection results, java.lang.String property)` Calculates the maximum value of a property
	`public java.lang.Object`	`min(java.util.Collection results, java.lang.String property)` Calculates the minimum value of a property
	`public java.util.List`	`property(java.util.Collection results, java.lang.String property)` Obtains a properties value from the results

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class java.lang.Object`	`java.lang.Object#wait(long, int), java.lang.Object#wait(), java.lang.Object#wait(long), 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()`

- Constructor Detail
  - public ManualProjections(PersistentEntity entity)
- Method Detail
  - public int countDistinct(java.util.Collection results, java.lang.String property)
    
    Counts the number of distinct values
    Parameters:
    results - The results
    property - The property
    Returns:
    A count of the distinct values
  - public java.util.Collection distinct(java.util.Collection results, java.lang.String property)
  - public java.lang.Object max(java.util.Collection results, java.lang.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 java.lang.Object min(java.util.Collection results, java.lang.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 java.util.List property(java.util.Collection results, java.lang.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

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