er.extensions.foundation
Class ERXArrayUtilities.ObjectAtIndexOperator

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

All Implemented Interfaces:

NSArray.Operator

Enclosing class:

ERXArrayUtilities

public static class ERXArrayUtilities.ObjectAtIndexOperator
extends Object
implements NSArray.Operator

Define an NSArray.Operator for the key objectAtIndex.

This allows for key value paths like:

myArray.valueForKey("@objectAtIndex.3.firstName");

Constructor Summary

ERXArrayUtilities.ObjectAtIndexOperator()
public empty constructor

Method Summary

Object

compute(NSArray array, String keypath) returns the keypath value for n-ths object.

Methods inherited from class java.lang.Object

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

Constructor Detail

ERXArrayUtilities.ObjectAtIndexOperator

public ERXArrayUtilities.ObjectAtIndexOperator()

public empty constructor

Method Detail

compute

public Object compute(NSArray array,
                      String keypath)

returns the keypath value for n-ths object.

Specified by:

compute in interface NSArray.Operator

Parameters:

array - array to be checked.

keypath - integer value of index (zero based).

Returns:

null if array is empty or value is not in index, keypath value otherwise.