er.extensions.foundation
Class ERXArrayUtilities.SubarrayWithRangeOperator

java.lang.Object
  er.extensions.foundation.ERXArrayUtilities.SubarrayWithRangeOperator

All Implemented Interfaces:

NSArray.Operator

Enclosing class:

ERXArrayUtilities

public static class ERXArrayUtilities.SubarrayWithRangeOperator
extends Object

Define an NSArray.Operator for the key subarrayWithRange.

This allows for key value paths like:

myArray.valueForKeyPath("@subarrayWithRange.20-3.name");

Note that the syntax is slightly misleading, implying that you provide a start and end index. In fact, the API matches NSRange and you must provide a start index and a length. Unfortunately changing this either syntax or implementation will break backwards compatibility (and subtly), so we have to suck it up for now.

Constructor Summary

ERXArrayUtilities.SubarrayWithRangeOperator()
public empty constructor

Method Summary

Object	compute(NSArray array, String keypath)
NSArray	contents(NSArray array, String keypath)

Methods inherited from class java.lang.Object

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

Constructor Detail

ERXArrayUtilities.SubarrayWithRangeOperator

public ERXArrayUtilities.SubarrayWithRangeOperator()

public empty constructor

Method Detail

compute

public Object compute(NSArray array,
                      String keypath)

Parameters:

array - array to be checked.

keypath - name of fetch specification.

Returns:

Boolean.TRUE if array is empty, Boolean.FALSE otherwise.

contents

public NSArray contents(NSArray array,
                        String keypath)