Class ViewDescriptor

java.lang.Object
org.apache.derby.iapi.sql.dictionary.TupleDescriptor
org.apache.derby.iapi.sql.dictionary.UniqueTupleDescriptor
org.apache.derby.iapi.sql.dictionary.ViewDescriptor
All Implemented Interfaces:
Dependable, Dependent, Provider
public final class ViewDescriptor extends UniqueTupleDescriptor implements Dependent, Provider
This is the implementation of ViewDescriptor. Users of View descriptors should only use the following methods:
  1. getUUID
  2. setUUID
  3. getViewText
  4. setViewName
  5. getCheckOptionType
  6. getCompSchemaId
Version:
0.1

  • Field Details

    • checkOption

      private final int checkOption

    • viewName

      private String viewName

    • viewText

      private final String viewText

    • uuid

      private UUID uuid

    • compSchemaId

      private final UUID compSchemaId

    • NO_CHECK_OPTION

      public static final int NO_CHECK_OPTION
      See Also:

  • Constructor Details

    • ViewDescriptor

      public ViewDescriptor(DataDictionary dataDictionary, UUID viewID, String viewName, String viewText, int checkOption, UUID compSchemaId)
      Constructor for a ViewDescriptor.
      Parameters:
      dataDictionary - The data dictionary that this descriptor lives in
      viewID - The UUID for the view
      viewName - The name of the view
      viewText - The text of the query expression from the view definition.
      checkOption - int check option type
      compSchemaId - the schemaid to compile in

  • Method Details

    • getUUID

      public UUID getUUID()
      Gets the UUID of the view.
      Specified by:
      getUUID in class UniqueTupleDescriptor
      Returns:
      The UUID of the view.

    • setUUID

      public void setUUID(UUID uuid)
      Sets the UUID of the view.
      Parameters:
      uuid - The UUID of the view.

    • getViewText

      public String getViewText()
      Gets the text of the view definition.
      Returns:
      A String containing the text of the CREATE VIEW statement that created the view

    • setViewName

      public void setViewName(String name)
      Sets the name of the view.
      Parameters:
      name - The name of the view.

    • getCheckOptionType

      public int getCheckOptionType()
      Gets an identifier telling what type of check option is on this view.
      Returns:
      An identifier telling what type of check option is on the view.

    • getCompSchemaId

      public UUID getCompSchemaId()
      Get the compilation type schema id when this view was first bound.
      Returns:
      the schema UUID

    • getDependableFinder

      public DependableFinder getDependableFinder()
      Description copied from interface: Dependable
      Get an object which can be written to disk and which, when read from disk, will find or reconstruct this in-memory Dependable.
      Specified by:
      getDependableFinder in interface Dependable
      Returns:
      the stored form of this provider
      See Also:

    • getObjectName

      public String getObjectName()
      Return the name of this Provider. (Useful for errors.)
      Specified by:
      getObjectName in interface Dependable
      Returns:
      String The name of this provider.

    • getObjectID

      public UUID getObjectID()
      Get the provider's UUID
      Specified by:
      getObjectID in interface Dependable
      Returns:
      String The provider's UUID

    • getClassType

      public String getClassType()
      Get the provider's type.
      Specified by:
      getClassType in interface Dependable
      Returns:
      String The provider's type.

    • isValid

      public boolean isValid()
      Check that all of the dependent's dependencies are valid.
      Specified by:
      isValid in interface Dependent
      Returns:
      true if the dependent is currently valid

    • prepareToInvalidate

      public void prepareToInvalidate(Provider p, int action, LanguageConnectionContext lcc) throws StandardException
      Prepare to mark the dependent as invalid (due to at least one of its dependencies being invalid).
      Specified by:
      prepareToInvalidate in interface Dependent
      Parameters:
      p - the provider
      action - The action causing the invalidation
      lcc - The LanguageConnectionContext
      Throws:
      StandardException - thrown if unable to make it invalid

    • makeInvalid

      public void makeInvalid(int action, LanguageConnectionContext lcc) throws StandardException
      Mark the dependent as invalid (due to at least one of its dependencies being invalid).
      Specified by:
      makeInvalid in interface Dependent
      Parameters:
      action - The action causing the invalidation
      lcc - The LanguageConnectionContext
      Throws:
      StandardException - thrown if unable to make it invalid

    • toString

      public String toString()
      Prints the contents of the ViewDescriptor
      Overrides:
      toString in class Object
      Returns:
      The contents as a String

    • drop

      public void drop(LanguageConnectionContext lcc, SchemaDescriptor sd, TableDescriptor td) throws StandardException
      Drop this descriptor, if not already done.
      Parameters:
      lcc - current language connection context
      sd - schema descriptor
      td - table descriptor for this view
      Throws:
      StandardException - standard error policy

    • drop

      private void drop(LanguageConnectionContext lcc, SchemaDescriptor sd, TableDescriptor td, int action) throws StandardException
      Drop this descriptor, if not already done, due to action. If action is not DependencyManager.DROP_VIEW, the descriptor is dropped due to dropping some other object, e.g. a table column.
      Parameters:
      lcc - current language connection context
      sd - schema descriptor
      td - table descriptor for this view
      action - action
      Throws:
      StandardException - standard error policy

    • getName

      public String getName()