org.axiondb.engine.commands
Class BaseAxionCommand

java.lang.Object
  org.axiondb.engine.commands.BaseAxionCommand

All Implemented Interfaces:

AxionCommand

Direct Known Subclasses:

AlterTableCommand, CheckFileStateCommand, ConstraintCommand, CreateCommand, DefragCommand, DeleteCommand, DropCommand, InsertCommand, RemountCommand, SelectCommand, ShutdownCommand, TruncateCommand, UpdateCommand, UpsertCommand

public abstract class BaseAxionCommand

extends Object

implements AxionCommand

Abstract base AxionCommandimplementation.

Version:

$Revision: 1.24 $ $Date: 2004/09/09 23:47:43 $

Constructor Summary

BaseAxionCommand()

Method Summary

static void	appendBindVariables(Selectable sel, List list)
protected void	assertNotReadOnly(Database db) Throws an AxionExceptionif the given Databaseis read-only.
protected Object	attemptToConvertValue(Object val, DataType type, ColumnIdentifier colid)
void	bind(int index, Object value) Sets the value of the i th bind variable within this command.
void	clearBindings() Clears all bind variables within this command.
protected Iterator	getBindVariableIterator() Returns an Iteratorover all my BindVariables, in the proper order.
int	getEffectedRowCount() Returns the last row count generated by AxionCommand.execute(org.axiondb.Database) or AxionCommand.executeUpdate(org.axiondb.Database).
ResultSet	getResultSet() Returns the last ResultSet generated by AxionCommand.execute(org.axiondb.Database) or AxionCommand.executeQuery(org.axiondb.Database).
protected RowIterator	getRowIterator(Table table, Selectable whereNode, boolean readOnly)
protected RowIterator	getRowIterator(Table table, Selectable whereNode, boolean readOnly, RowDecorator dec)
protected Table	getTableForIdentifier(Database db, TableIdentifier identifier)
protected void	resolveSelectableList(List list, Database db, TableIdentifier table)
protected void	resolveSelectableList(List list, Database db, TableIdentifier[] tables)
protected void	setEffectedRowCount(int count) If sublasses return a number of rows effected, then upon execution, they should set that number here so it can support AxionCommand.execute(org.axiondb.Database)
protected void	setResultSet(ResultSet rset) If subclasses create a AxionResultSetupon execution, they should set it here so that they can support AxionCommand.execute(org.axiondb.Database).

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axiondb.AxionCommand

execute, executeQuery, executeUpdate

Constructor Detail

BaseAxionCommand

public BaseAxionCommand()

Method Detail

setResultSet

protected void setResultSet(ResultSet rset)

If subclasses create a AxionResultSetupon execution, they should set it here so that they can support AxionCommand.execute(org.axiondb.Database).

See Also:

getResultSet()

getResultSet

public ResultSet getResultSet()

Description copied from interface: AxionCommand

Returns the last ResultSet generated by AxionCommand.execute(org.axiondb.Database) or AxionCommand.executeQuery(org.axiondb.Database).

Specified by:

getResultSet in interface AxionCommand

setEffectedRowCount

protected void setEffectedRowCount(int count)

If sublasses return a number of rows effected, then upon execution, they should set that number here so it can support AxionCommand.execute(org.axiondb.Database)

getEffectedRowCount

public int getEffectedRowCount()

Description copied from interface: AxionCommand

Returns the last row count generated by AxionCommand.execute(org.axiondb.Database) or AxionCommand.executeUpdate(org.axiondb.Database).

Specified by:

getEffectedRowCount in interface AxionCommand

bind

public void bind(int index,
                 Object value)
          throws AxionException

Sets the value of the i ^th bind variable within this command.

Specified by:

bind in interface AxionCommand

Parameters:

index - the one-based index of the variable

value - the value to bind the variable to

Throws:

AxionException

clearBindings

public void clearBindings()
                   throws AxionException

Clears all bind variables within this command.

Specified by:

clearBindings in interface AxionCommand

Throws:

AxionException

assertNotReadOnly

protected void assertNotReadOnly(Database db)
                          throws AxionException

Throws an AxionExceptionif the given Databaseis read-only.

Throws:

AxionException

getBindVariableIterator

protected Iterator getBindVariableIterator()

Returns an Iteratorover all my BindVariables, in the proper order. Default impl returns empty iterator.

appendBindVariables

public static void appendBindVariables(Selectable sel,
                                       List list)

attemptToConvertValue

protected Object attemptToConvertValue(Object val,
                                       DataType type,
                                       ColumnIdentifier colid)
                                throws AxionException

Throws:

AxionException

getRowIterator

protected RowIterator getRowIterator(Table table,
                                     Selectable whereNode,
                                     boolean readOnly)
                              throws AxionException

Throws:

AxionException

getRowIterator

protected RowIterator getRowIterator(Table table,
                                     Selectable whereNode,
                                     boolean readOnly,
                                     RowDecorator dec)
                              throws AxionException

Throws:

AxionException

getTableForIdentifier

protected Table getTableForIdentifier(Database db,
                                      TableIdentifier identifier)
                               throws AxionException

Throws:

AxionException

resolveSelectableList

protected void resolveSelectableList(List list,
                                     Database db,
                                     TableIdentifier table)
                              throws AxionException

Throws:

AxionException

resolveSelectableList

protected void resolveSelectableList(List list,
                                     Database db,
                                     TableIdentifier[] tables)
                              throws AxionException

Throws:

AxionException