er.extensions.foundation

Class ERXKeyValueCodingUtilities

java.lang.Object

er.extensions.foundation.ERXKeyValueCodingUtilities

public class ERXKeyValueCodingUtilities
extends 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

Fields

Modifier and Type	Field and Description
static com.webobjects.foundation.NSKeyValueCodingAdditions	Statics

Constructor Summary

Constructors

Constructor and Description
ERXKeyValueCodingUtilities()

Method Summary

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

Returns:

value object

staticStringsForClass

public static NSArray<ERXKeyValuePair> staticStringsForClass(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 -

Returns:

list of final string constants

privateValueForKey

public static Object privateValueForKey(Object target,
                                        String key)

takePrivateValueForKey

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

fieldForKey

public static Field fieldForKey(Object target,
                                String key)

methodForKey

public static Method methodForKey(Object target,
                                  String key)

takeChangedValuesFromDictionary

public static void takeChangedValuesFromDictionary(Object object,
                                                   NSDictionary<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