ExtendableEntityUtil (Google App Engine API for Java)

com.google.appengine.api.datastore

Class ExtendableEntityUtil

• java.lang.Object
• • com.google.appengine.api.datastore.ExtendableEntityUtil

• ---

  
  

  public final class ExtendableEntityUtil
  extends java.lang.Object

  Internal class that provides utility methods for extendable entity objects.

• • Method Summary

    All Methods Static Methods Concrete Methods 

    Modifier and Type	Method and Description
    static boolean	areKeysEqual(Key key1, Key key2) Check if the input Key objects are equal (including keys that are incomplete).
    static void	checkSupportedValue(java.lang.String propertyName, java.lang.Object value, boolean valuePreChecked, java.util.Set<java.lang.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, java.lang.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,
                                  java.lang.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(java.lang.String propertyName,
                                             java.lang.Object value,
                                             boolean valuePreChecked,
                                             java.util.Set<java.lang.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:

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