er.extensions.foundation

Class ERXArrayUtilities.FetchSpecOperator

java.lang.Object

er.extensions.foundation.ERXArrayUtilities.FetchSpecOperator

All Implemented Interfaces:

NSArray.Operator

Enclosing class:

ERXArrayUtilities

public static class ERXArrayUtilities.FetchSpecOperator
extends Object

Define an NSArray.Operator for the key fetchSpec.

This allows for key value paths like:

myArray.valueForKey("@fetchSpec.fetchUsers");

Which in this case would return myArray filtered and sorted by the EOFetchSpecification named "fetchUsers" which must be a model-based fetchspec in the first object's entity.

See Also:

BaseOperator

Constructor Summary

Constructors

Constructor and Description
FetchSpecOperator()

Method Summary

Modifier and Type	Method and Description
Object	compute(NSArray array, String keypath) Filters and sorts the given array by the named fetchspecification.
Object	contents(NSArray<?> array, String keypath) Rather than iterating through the array argument calling valueForKeyPath on each array object, this method operates by calling valueForKeyPath on the array argument instead.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FetchSpecOperator

public FetchSpecOperator()

Method Detail

compute

public Object compute(NSArray array,
                      String keypath)

Filters and sorts the given array by the named fetchspecification.

Parameters:

array - array to be filtered.

keypath - name of fetch specification.

Returns:

immutable filtered array.

contents

public Object contents(NSArray<?> array,
                       String keypath)

Rather than iterating through the array argument calling valueForKeyPath on each array object, this method operates by calling valueForKeyPath on the array argument instead. This method is used by Wonder operators to chain multiple array operators in a single key path.

Parameters:

array - the array value for the operator

keypath - the keypath to call on the array argument

Returns:

the object value produced by valueForKeyPath, or the array itself if the keypath is empty