er.extensions.foundation

Class ERXArrayUtilities.SortOperator

java.lang.Object

er.extensions.foundation.ERXArrayUtilities.SortOperator

All Implemented Interfaces:

NSArray.Operator

Enclosing class:

ERXArrayUtilities

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

Define an NSArray.Operator for the key sort.

This allows for key value paths like:

1. myArray.valueForKey("@sort.firstName");
2. myArray.valueForKey("@sort.lastName,firstName.length");

Which in the first case would return myArray sorted ascending by first name and the second case by lastName and then by the length() of the firstName. Due to the way the sort key arguments are written, this key cannot occur anywhere except at the very end of the keypath.

Constructor Summary

Constructors

Constructor and Description
SortOperator(com.webobjects.foundation.NSSelector selector)

Method Summary

Modifier and Type	Method and Description
Object	compute(NSArray array, String keypath) Sorts the given array by the keypath.

Methods inherited from class java.lang.Object

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

Constructor Detail

SortOperator

public SortOperator(com.webobjects.foundation.NSSelector selector)

Method Detail

compute

public Object compute(NSArray array,
                      String keypath)

Sorts the given array by the keypath.

Specified by:

compute in interface NSArray.Operator

Parameters:

array - array to be sorted.

keypath - sort key.

Returns:

immutable sorted array.