er.extensions.foundation

Class ERXComparatorSelector

java.lang.Object

com.webobjects.foundation.NSSelector

er.extensions.foundation.ERXComparatorSelector

All Implemented Interfaces:

Serializable

public class ERXComparatorSelector
extends com.webobjects.foundation.NSSelector

ERXComparatorSelector allows you to pass an arbitrary Comparator instance as an NSSelector into EOSortOrdering for use with an in-memory sort. Note that this WILL NOT work for sorting directly in the database. This exploits the fact that EOSortOrdering calls selector.invoke(left, right) when you pass it an arbitrary selector to use.

 Example: ERXArrayUtilities.sortedArraySortedWithKey(array, "someKey", new ERXComparatorSelector(Collator.getInstance()))
 

See Also:

Serialized Form

Author:

mschrag

Field Summary

Fields inherited from class com.webobjects.foundation.NSSelector

_CLASS, _name, _types

Constructor Summary

Constructors

Constructor and Description
ERXComparatorSelector(Comparator comparator) Constructs a new ERXComparatorSelector.

Method Summary

Modifier and Type	Method and Description
Object	invoke(Object target, Object argument)

Methods inherited from class com.webobjects.foundation.NSSelector

_safeInvokeMethod, _safeInvokeSelector, equals, hashCode, implementedByClass, implementedByObject, invoke, invoke, invoke, invoke, invoke, invoke, methodOnClass, methodOnObject, name, parameterTypes, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ERXComparatorSelector

public ERXComparatorSelector(Comparator comparator)

Constructs a new ERXComparatorSelector.

Parameters:

comparator - the backing comparator to sort with

Method Detail

invoke

public Object invoke(Object target,
                     Object argument)
              throws IllegalAccessException,
                     IllegalArgumentException,
                     InvocationTargetException,
                     NoSuchMethodException

Overrides:

invoke in class com.webobjects.foundation.NSSelector

Throws:

IllegalAccessException

IllegalArgumentException

InvocationTargetException

NoSuchMethodException