er.extensions.foundation
Class ERXArrayUtilities.ObjectAtIndexOperator

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

All Implemented Interfaces:

com.webobjects.foundation.NSArray.Operator

Enclosing class:

ERXArrayUtilities

public static class ERXArrayUtilities.ObjectAtIndexOperator
extends java.lang.Object
implements com.webobjects.foundation.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

java.lang.Object

compute(com.webobjects.foundation.NSArray<?> array, java.lang.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 java.lang.Object compute(com.webobjects.foundation.NSArray<?> array,
                                java.lang.String keypath)

returns the keypath value for n-ths object.

Specified by:

compute in interface com.webobjects.foundation.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 for the object at index otherwise.