er.extensions.foundation
Class ERXComparatorSelector

java.lang.Object
  com.webobjects.foundation.NSSelector
      er.extensions.foundation.ERXComparatorSelector

All Implemented Interfaces:

java.io.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

ERXComparatorSelector(java.util.Comparator comparator)
Constructs a new ERXComparatorSelector.

Method Summary

java.lang.Object

invoke(java.lang.Object target, java.lang.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(java.util.Comparator comparator)

Constructs a new ERXComparatorSelector.

Parameters:

comparator - the backing comparator to sort with

Method Detail

invoke

public java.lang.Object invoke(java.lang.Object target,
                               java.lang.Object argument)
                        throws java.lang.IllegalAccessException,
                               java.lang.IllegalArgumentException,
                               java.lang.reflect.InvocationTargetException,
                               java.lang.NoSuchMethodException

Overrides:

invoke in class com.webobjects.foundation.NSSelector

Throws:

java.lang.IllegalAccessException

java.lang.IllegalArgumentException

java.lang.reflect.InvocationTargetException

java.lang.NoSuchMethodException