er.extensions.foundation
Class ERXArrayUtilities.FetchSpecOperator

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

All Implemented Interfaces:

com.webobjects.foundation.NSArray.Operator

Enclosing class:

ERXArrayUtilities

public static class ERXArrayUtilities.FetchSpecOperator
extends java.lang.Object

Define an NSArray.Operator for the key fetchSpec.

This allows for key value paths like:

myArray.valueForKey("@fetchSpec.fetchUsers");

Which in this case would return myArray filtered and sorted by the EOFetchSpecification named "fetchUsers" which must be a model-based fetchspec in the first object's entity.

See Also:

BaseOperator

Constructor Summary

ERXArrayUtilities.FetchSpecOperator()
public empty constructor

Method Summary

java.lang.Object	compute(com.webobjects.foundation.NSArray<?> array, java.lang.String keypath) Filters and sorts the given array by the named fetchspecification.
java.lang.Object	contents(com.webobjects.foundation.NSArray<?> array, java.lang.String keypath) Rather than iterating through the array argument calling valueForKeyPath on each array object, this method operates by calling valueForKeyPath on the array argument instead.

Methods inherited from class java.lang.Object

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

Constructor Detail

ERXArrayUtilities.FetchSpecOperator

public ERXArrayUtilities.FetchSpecOperator()

public empty constructor

Method Detail

compute

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

Filters and sorts the given array by the named fetchspecification.

Parameters:

array - array to be filtered.

keypath - name of fetch specification.

Returns:

immutable filtered array.

contents

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

Rather than iterating through the array argument calling valueForKeyPath on each array object, this method operates by calling valueForKeyPath on the array argument instead. This method is used by Wonder operators to chain multiple array operators in a single key path.

Parameters:

array - the array value for the operator

keypath - the keypath to call on the array argument

Returns:

the object value produced by valueForKeyPath, or the array itself if the keypath is empty