com.webobjects.foundation
Class NSKeyValueCoding.UnknownKeyException

java.lang.Object
  java.lang.Throwable
      java.lang.Exception
          java.lang.RuntimeException
              com.webobjects.foundation.NSKeyValueCoding.UnknownKeyException

All Implemented Interfaces:

Serializable

Enclosing class:

NSKeyValueCoding

public static class NSKeyValueCoding.UnknownKeyException

extends RuntimeException

Instances of the NSKeyValueCoding.UnknownKeyException class are created and thrown when an unknown key is encountered during key-value coding.

For example, suppose an Employee object receives a valueForKey message with "partNumber" as the key. The Employee class does not declare a method or instance variable for "partNumber", so valueForKey throws an UnknownKeyException. An NSKeyValueCoding.UnknownKeyException has a user info dictionary containing entries for the object for which key-value coding failed (TargetObjectUserInfoKey) and the unknown key (UnknownUserInfoKey). For the Employee/partNumber example, the TargetObjectUserInfoKey entry would contain the Employee object and the UnknownUserInfoKey would contain the string "partNumber".

See Also:

object(), key(), NSKeyValueCoding.valueForKey(java.lang.String), NSKeyValueCoding, NSKeyValueCoding.ErrorHandling, Serialized Form

Field Summary

static String	TargetObjectUserInfoKey Deprecated. this user info dictionary entry should be accessed using the object method.
static String	UnknownUserInfoKey Deprecated. this user info dictionary entry should be accessed using the key method.

Constructor Summary

NSKeyValueCoding.UnknownKeyException(String message, NSDictionary userInfo)
Deprecated. Use NSKeyValueCoding.UnknownKeyException(java.lang.String, java.lang.Object, java.lang.String) instead.

NSKeyValueCoding.UnknownKeyException(String message, Object object, String key)
Creates and returns a new UnknownKeyException with message as the message and a user info dictionary specifying object for the TargetObjectUserInfoKey and key for the UnknownUserInfoKey.

Method Summary

String	key() This method returns the key that NSKeyValueCoding operations were using at the time of the error, or null if it is unavailable.
Object	object() This method returns the value that NSKeyValueCoding operations were using at the time of the error, or null if it is unavailable.
NSDictionary	userInfo() Deprecated. The object and key methods should be used instead

Methods inherited from class java.lang.Throwable

fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Field Detail

TargetObjectUserInfoKey

public static final String TargetObjectUserInfoKey

Deprecated. this user info dictionary entry should be accessed using the object method.

See Also:

object()

UnknownUserInfoKey

public static final String UnknownUserInfoKey

Deprecated. this user info dictionary entry should be accessed using the key method.

See Also:

key()

Constructor Detail

NSKeyValueCoding.UnknownKeyException

public NSKeyValueCoding.UnknownKeyException(String message,
                                            Object object,
                                            String key)

Creates and returns a new UnknownKeyException with message as the message and a user info dictionary specifying object for the TargetObjectUserInfoKey and key for the UnknownUserInfoKey.

Parameters:

message - the message created and return

object - object specified for the TargetObjectUserInfoKey. It may be null

key - identifies the property of an object. It may be null

See Also:

object(), key()

NSKeyValueCoding.UnknownKeyException

public NSKeyValueCoding.UnknownKeyException(String message,
                                            NSDictionary userInfo)

Deprecated. Use NSKeyValueCoding.UnknownKeyException(java.lang.String, java.lang.Object, java.lang.String) instead.

Parameters:

message - A message or summary associated with the new exception

userInfo - the user info dictionary containing more information about the error

See Also:

NSKeyValueCoding.UnknownKeyException(String, Object, String), TargetObjectUserInfoKey, UnknownUserInfoKey

Method Detail

key

public String key()

This method returns the key that NSKeyValueCoding operations were using at the time of the error, or null if it is unavailable. This is equivalent to getting the UnknownUserInfoKey entry from the userInfo dictionary.

Returns:

the unknown key that caused the exception to be thrown

See Also:

UnknownUserInfoKey

object

public Object object()

This method returns the value that NSKeyValueCoding operations were using at the time of the error, or null if it is unavailable. This is equivalent to getting the TargetObjectUserInfoKey entry from the userInfo dictionary.

Returns:

the object on which key-value coding was operating when an unknown key was encountered

See Also:

TargetObjectUserInfoKey

userInfo

public NSDictionary userInfo()

Deprecated. The object and key methods should be used instead

Returns:

the userInfo dictionary associated with this exception

See Also:

object(), key()