Class LanguageDbPropertySetter

java.lang.Object
org.apache.derby.impl.sql.LanguageDbPropertySetter
All Implemented Interfaces:
PropertySetCallback

public class LanguageDbPropertySetter extends Object implements PropertySetCallback
A class to handle setting language database properties
  • Constructor Details

    • LanguageDbPropertySetter

      public LanguageDbPropertySetter()
  • Method Details

    • init

      public void init(boolean dbOnly, 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(String key, Serializable value, 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(String key, Serializable value, 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 Serializable map(String key, Serializable value, 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(String contextID)
      Privileged lookup of a Context. Must be private so that user code can't call this entry point.