er.extensions.foundation

Class ERXArrayUtilities.RemoveNullValuesOperator

java.lang.Object

er.extensions.foundation.ERXArrayUtilities.RemoveNullValuesOperator

All Implemented Interfaces:

NSArray.Operator

Enclosing class:

ERXArrayUtilities

public static class ERXArrayUtilities.RemoveNullValuesOperator
extends Object

Define an NSArray.Operator for the key removeNullValues.

This allows for key value paths like:

myArray.valueForKeyPath("@removeNullValues.someOtherPath");

Which in this case would remove the occurrences of NSKeyValueCoding.Null from myArray before continuing to process someOtherPath.

See Also:

BaseOperator

Constructor Summary

Constructors

Constructor and Description
RemoveNullValuesOperator()

Method Summary

Modifier and Type	Method and Description
Object	compute(NSArray array, String keypath) Removes null values from the given array.
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

RemoveNullValuesOperator

public RemoveNullValuesOperator()

Method Detail

compute

public Object compute(NSArray array,
                      String keypath)

Removes null values from the given array.

Parameters:

array - array to be filtered.

keypath - the key path to follow after filtering

Returns:

the value produced by following keypath after filtering nulls from the 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