Dependent

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Package

Class

Use

Deprecated

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org.apache.derby.iapi.sql.depend
Interface Dependent

All Superinterfaces:: org.apache.derby.catalog.Dependable

public interface Dependent
extends org.apache.derby.catalog.Dependable

A dependent has the ability to know whether or not it is valid and to mark itself as valid or invalid. Marking itself as invalid usually means it cannot be used in the system until it is revalidated, but this is in no way enforced by this interface.

Field Summary

Fields inherited from interface org.apache.derby.catalog.Dependable

ALIAS, COLUMNS_IN_TABLE, CONGLOMERATE, CONSTRAINT, DEFAULT, FILE, HEAP, INDEX, PREPARED_STATEMENT, SCHEMA, STORED_PREPARED_STATEMENT, TABLE, TRIGGER, VIEW

Method Summary

boolean isValid()
          Check that all of the dependent's dependencies are valid.

void makeInvalid(int action, org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc)
          Mark the dependent as invalid (due to at least one of its dependencies being invalid).

void makeValid(org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc)
          Attempt to revalidate the dependent.

void prepareToInvalidate(Provider p, int action, org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc)
          Prepare to mark the dependent as invalid (due to at least one of its dependencies being invalid).

Methods inherited from interface org.apache.derby.catalog.Dependable

getClassType, getDependableFinder, getObjectID, getObjectName, isPersistent

Method Detail

isValid

public boolean isValid()

Check that all of the dependent's dependencies are valid.

prepareToInvalidate

public void prepareToInvalidate(Provider p,
                                int action,
                                org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc)
                         throws org.apache.derby.iapi.error.StandardException

Prepare to mark the dependent as invalid (due to at least one of its dependencies being invalid).

makeInvalid

public void makeInvalid(int action,
                        org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc)
                 throws org.apache.derby.iapi.error.StandardException

Mark the dependent as invalid (due to at least one of its dependencies being invalid).

makeValid

public void makeValid(org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc)
               throws org.apache.derby.iapi.error.StandardException

Attempt to revalidate the dependent. For prepared statements, this could go through its dependencies and check that they are up to date; if not, it would recompile the statement. Any failure during this attempt should throw DependencyStatementException.unableToRevalidate().