Package com.google.appengine.api.datastore

Class ExtendableEntityUtil

java.lang.Object

com.google.appengine.api.datastore.ExtendableEntityUtil

public final class ExtendableEntityUtil
extends Object

Internal class that provides utility methods for extendable entity objects.

Method Summary

Modifier and Type	Method	Description
static boolean	areKeysEqual(Key key1, Key key2)	Check if the input Key objects are equal (including keys that are incomplete).
static void	checkSupportedValue(String propertyName, Object value, boolean valuePreChecked, Set<Class<?>> supportedTypes)	If the specified object cannot be used as the value for a Entity property, throw an exception with the appropriate explanation.
static Key	createKey(Key parent, String kind)	Creates a new Key with the provided parent and kind.

Methods inherited from class java.lang.Object

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

Method Detail

createKey

public static Key createKey(Key parent,
                            String kind)

Creates a new Key with the provided parent and kind. The instantiated Key will be incomplete.

Parameters:

parent - the parent of the key to create, can be null

kind - the kind of the key to create

areKeysEqual

public static boolean areKeysEqual(Key key1,
                                   Key key2)

Check if the input Key objects are equal (including keys that are incomplete).

Parameters:

key1 - the first input key

key2 - the second input key

Returns:

true if the keys are equal. false otherwise.

checkSupportedValue

public static void checkSupportedValue(String propertyName,
                                       Object value,
                                       boolean valuePreChecked,
                                       Set<Class<?>> supportedTypes)

If the specified object cannot be used as the value for a Entity property, throw an exception with the appropriate explanation.

Parameters:

propertyName - the name of the property.

value - value in question

supportedTypes - the types considered to be valid types for the value.

valuePreChecked - true if the value without the name has already been checked. false otherwise.

Throws:

IllegalArgumentException - if the type is not supported, or if the object is in some other way invalid.