Package org.apache.derby.impl.sql

Class LanguageDbPropertySetter

  • All Implemented Interfaces:
    PropertySetCallback
    public class LanguageDbPropertySetter
extends java.lang.Object
implements PropertySetCallback
    A class to handle setting language database properties

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      Serviceable apply​(java.lang.String key, java.io.Serializable value, java.util.Dictionary p)
      Apply a property change.
      private static Context getContext​(java.lang.String contextID)
      Privileged lookup of a Context.
      void init​(boolean dbOnly, java.util.Dictionary p)
      Initialize the properties for this callback.
      java.io.Serializable map​(java.lang.String key, java.io.Serializable value, java.util.Dictionary p)
      Map a proposed new value for a property to an official value.
      boolean validate​(java.lang.String key, java.io.Serializable value, java.util.Dictionary p)
      Validate a property change.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • LanguageDbPropertySetter

        public LanguageDbPropertySetter()

    • Method Detail

      • init

        public void init​(boolean dbOnly,
                 java.util.Dictionary p)
        Description copied from interface: PropertySetCallback
        Initialize the properties for this callback. Called when addPropertySetNotification() is called with a non-null transaction controller. This allows code to set read its initial property values at boot time.

        Code within an init() method should use the 3 argument PropertyUtil method getPropertyFromSet() to obtain a property's value.

        Specified by:
        init in interface PropertySetCallback
        Parameters:
        dbOnly - true if only per-database properties are to be looked at
        p - the complete set of per-database properties.

      • validate

        public boolean validate​(java.lang.String key,
                        java.io.Serializable value,
                        java.util.Dictionary p)
                 throws StandardException
        Description copied from interface: PropertySetCallback
        Validate a property change.
        Specified by:
        validate in interface PropertySetCallback
        Parameters:
        key - Property key for the property being set
        value - proposed new value for the property being set or null if the property is being dropped.
        p - Property set before the change. SettingProperty may read but must never change p.
        Returns:
        true if this object was interested in this property, false otherwise.
        Throws:
        StandardException - Thrown on error.

      • apply

        public Serviceable apply​(java.lang.String key,
                         java.io.Serializable value,
                         java.util.Dictionary p)
        Description copied from interface: PropertySetCallback
        Apply a property change. Will only be called after validate has been called and only if validate returned true. If this method is called then the new value is the value to be used, ie. the property is not set in the overriding JVM system set.
        Specified by:
        apply in interface PropertySetCallback
        Parameters:
        key - Property key for the property being set
        value - proposed new value for the property being set or null if the property is being dropped.
        p - Property set before the change. SettingProperty may read but must never change p.
        Returns:
        post commit work for the property change.

      • map

        public java.io.Serializable map​(java.lang.String key,
                                java.io.Serializable value,
                                java.util.Dictionary p)
        Description copied from interface: PropertySetCallback
        Map a proposed new value for a property to an official value. Will only be called after apply() has been called.
        Specified by:
        map in interface PropertySetCallback
        Parameters:
        key - Property key for the property being set
        value - proposed new value for the property being set or null if the property is being dropped.
        p - Property set before the change. SettingProperty may read but must never change p.
        Returns:
        new value for the change

      • getContext

        private static Context getContext​(java.lang.String contextID)
        Privileged lookup of a Context. Must be private so that user code can't call this entry point.