er.extensions.foundation
Class ERXKeyValueCodingUtilities

java.lang.Object
  er.extensions.foundation.ERXKeyValueCodingUtilities

public class ERXKeyValueCodingUtilities
extends java.lang.Object

Utilities for use with key value coding. You could instantiate one of these in your app-startup:

 ERXKeyValueCodingUtilities.registerClass(SomeClass.class); 
 NSKeyValueCodingAdditions statics = ERXKeyValueCodingUtilities.Statics;
 myValue = statics.valueForKeyPath("SomeClass.SOME_FIELD");
 

Also has utilities for getting and private fields and methods on an object.

Author:

ak

Field Summary

static com.webobjects.foundation.NSKeyValueCodingAdditions

Statics

Constructor Summary

ERXKeyValueCodingUtilities()

Method Summary

static java.lang.Object	classValueForKey(java.lang.Class clazz, java.lang.String key) Extends key-value coding to a class.
static java.lang.reflect.Field	fieldForKey(java.lang.Object target, java.lang.String key)
static java.lang.reflect.Method	methodForKey(java.lang.Object target, java.lang.String key)
static java.lang.Object	privateValueForKey(java.lang.Object target, java.lang.String key)
static void	registerClass(java.lang.Class clazz) Registers the class in the KVC resolving system, so you can use valueForKeyPath("MyClass.SOME_KEY").
static com.webobjects.foundation.NSArray<ERXKeyValuePair>	staticStringsForClass(java.lang.Class c) Returns final strings constants from an interface or class.
static void	takeChangedValuesFromDictionary(java.lang.Object object, com.webobjects.foundation.NSDictionary<java.lang.String,?> dictionary) * Works like takeValuesFromDictionary, except that it only calls takeValueForKey if the current value * is different than the new value.
static void	takePrivateValueForKey(java.lang.Object target, java.lang.Object value, java.lang.String key)

Methods inherited from class java.lang.Object

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

Field Detail

Statics

public static final com.webobjects.foundation.NSKeyValueCodingAdditions Statics

Constructor Detail

ERXKeyValueCodingUtilities

public ERXKeyValueCodingUtilities()

Method Detail

registerClass

public static void registerClass(java.lang.Class clazz)

Registers the class in the KVC resolving system, so you can use valueForKeyPath("MyClass.SOME_KEY"). Inner classes are registered with a "$", i.e. MyClass$InnerClass

Parameters:

clazz -

classValueForKey

public static java.lang.Object classValueForKey(java.lang.Class clazz,
                                                java.lang.String key)

Extends key-value coding to a class. Java arrays and collections are morphed into NSArrays. The implementation is pretty slow, but I didn't exactly want to re-implement all of NSKeyValueCoding here.

Parameters:

clazz -

key -

staticStringsForClass

public static com.webobjects.foundation.NSArray<ERXKeyValuePair> staticStringsForClass(java.lang.Class c)

Returns final strings constants from an interface or class. Useful in particular when you want to create selection lists from your interfaces automatically.

Parameters:

c -

privateValueForKey

public static java.lang.Object privateValueForKey(java.lang.Object target,
                                                  java.lang.String key)

takePrivateValueForKey

public static void takePrivateValueForKey(java.lang.Object target,
                                          java.lang.Object value,
                                          java.lang.String key)

fieldForKey

public static java.lang.reflect.Field fieldForKey(java.lang.Object target,
                                                  java.lang.String key)

methodForKey

public static java.lang.reflect.Method methodForKey(java.lang.Object target,
                                                    java.lang.String key)

takeChangedValuesFromDictionary

public static void takeChangedValuesFromDictionary(java.lang.Object object,
                                                   com.webobjects.foundation.NSDictionary<java.lang.String,?> dictionary)

* Works like takeValuesFromDictionary, except that it only calls takeValueForKey if the current value * is different than the new value. *

Parameters:

object - the object on which to operate

dictionary - the key-value pairs to set