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.

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App Engine standard environment for Java