org.axiondb.engine.commands
Class BaseAxionCommand

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

All Implemented Interfaces:

AxionCommand

Direct Known Subclasses:

AlterTableCommand, CheckFileStateCommand, ChildTableUpdater, ConstraintCommand, CreateCommand, DefragCommand, DropCommand, InsertCommand, InsertIntoClause, RemountCommand, SelectCommand, ShutdownCommand, TruncateCommand

public abstract class BaseAxionCommand
extends java.lang.Object
implements AxionCommand

Abstract base AxionCommandimplementation.

Version:

$Revision: 1.37 $ $Date: 2005/12/22 09:02:29 $

Constructor Summary

BaseAxionCommand()

Method Summary

protected void	assertNotReadOnly(Database db) Throws an AxionExceptionif the given Databaseis read-only.
protected java.lang.Object	attemptToConvertValue(java.lang.Object val, DataType type, ColumnIdentifier colid)
void	bindAll(java.lang.Object[] vals) Sets the values of all bind variable within this command.
protected void	buildBindVariables()
void	clearBindings() Clears all bind variables within this command.
protected void	createResolveSelectableVisitor(Database db)
AxionResultSet	executeQuery(Database db, boolean isReadOnly) Execute an SQL statement that returns a single ResultSet object with the given read-only state.
protected java.util.Iterator	getBindVariableIterator() Returns an Iteratorover all my BindVariables, in the proper order.
protected java.util.Iterator	getBindVariableIterator(Selectable sel)
java.util.List	getBindVariables()
protected FindBindVariableVisitor	getBindVariableVisitor()
protected java.util.List	getColIdentifierList(Table table, TableIdentifier tid)
protected int	getCommitSize(Database db)
int	getEffectedRowCount() Returns the last row count generated by AxionCommand.execute(org.axiondb.Database) or AxionCommand.executeUpdate(org.axiondb.Database).
java.sql.ResultSet	getResultSet() Returns the last ResultSet generated by AxionCommand.execute(org.axiondb.Database) or AxionCommand.executeQuery(org.axiondb.Database).
protected RowIterator	getRowIterator(Database db, TableIdentifier tid, Table table, Selectable whereNode, boolean readOnly, RowDecorator dec)
protected RowDecorator	makeRowDecorator(Table table)
protected void	populateDefaultValues(Database db, Table table, TableIdentifier tableId, RowDecorator dec)
protected boolean	populateSequenceColumns(Database db, Table table, Row row)
protected void	resolveGeneratedColumns(Table table, TableIdentifier tableId, java.util.List cols)
protected void	resolveGeneratedColumns(Table table, TableIdentifier tableId, java.util.List cols, boolean useDefaultValues)
protected Selectable	resolveSelectable(Selectable sel, Database db, java.util.List selected, TableIdentifier[] tables)
protected Selectable	resolveSelectable(Selectable sel, Database db, TableIdentifier[] tables)
protected void	resolveSelectableList(java.util.List list, Database db, TableIdentifier table)
protected void	resolveSelectableList(java.util.List list, Database db, TableIdentifier[] tables)
protected void	setBindVariableVisitor(FindBindVariableVisitor visitor)
protected void	setDeferAllConstraintIfRequired(Table table)
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(java.sql.ResultSet rset) If subclasses create a AxionResultSetupon execution, they should set it here so that they can support AxionCommand.execute(org.axiondb.Database).
protected void	updateGeneratedValues(Database db, Table table, TableIdentifier tableId, Row row)

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

bindAll

public void bindAll(java.lang.Object[] vals)
             throws AxionException

Sets the values of all bind variable within this command.

Specified by:

bindAll 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

executeQuery

public AxionResultSet executeQuery(Database db,
                                   boolean isReadOnly)
                            throws AxionException

Description copied from interface: AxionCommand

Execute an SQL statement that returns a single ResultSet object with the given read-only state.

Specified by:

executeQuery in interface AxionCommand

Parameters:

db - Database in which query will be executed

isReadOnly - true if statement is read-only, false otherwise

Returns:

the generated ResultSet

Throws:

AxionException

getBindVariables

public java.util.List getBindVariables()

Specified by:

getBindVariables in interface AxionCommand

getEffectedRowCount

public final 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

getResultSet

public final java.sql.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

assertNotReadOnly

protected void assertNotReadOnly(Database db)
                          throws AxionException

Throws an AxionExceptionif the given Databaseis read-only.

Throws:

AxionException

attemptToConvertValue

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

Throws:

AxionException

buildBindVariables

protected void buildBindVariables()

createResolveSelectableVisitor

protected final void createResolveSelectableVisitor(Database db)

getBindVariableIterator

protected java.util.Iterator getBindVariableIterator()

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

getBindVariableIterator

protected java.util.Iterator getBindVariableIterator(Selectable sel)

getBindVariableVisitor

protected final FindBindVariableVisitor getBindVariableVisitor()

getColIdentifierList

protected java.util.List getColIdentifierList(Table table,
                                              TableIdentifier tid)
                                       throws AxionException

Throws:

AxionException

getCommitSize

protected int getCommitSize(Database db)

getRowIterator

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

Throws:

AxionException

makeRowDecorator

protected final RowDecorator makeRowDecorator(Table table)

populateDefaultValues

protected void populateDefaultValues(Database db,
                                     Table table,
                                     TableIdentifier tableId,
                                     RowDecorator dec)
                              throws AxionException

Throws:

AxionException

populateSequenceColumns

protected boolean populateSequenceColumns(Database db,
                                          Table table,
                                          Row row)
                                   throws AxionException

Throws:

AxionException

resolveGeneratedColumns

protected void resolveGeneratedColumns(Table table,
                                       TableIdentifier tableId,
                                       java.util.List cols)
                                throws AxionException

Throws:

AxionException

resolveGeneratedColumns

protected void resolveGeneratedColumns(Table table,
                                       TableIdentifier tableId,
                                       java.util.List cols,
                                       boolean useDefaultValues)
                                throws AxionException

Throws:

AxionException

resolveSelectable

protected Selectable resolveSelectable(Selectable sel,
                                       Database db,
                                       java.util.List selected,
                                       TableIdentifier[] tables)
                                throws AxionException

Throws:

AxionException

resolveSelectable

protected Selectable resolveSelectable(Selectable sel,
                                       Database db,
                                       TableIdentifier[] tables)
                                throws AxionException

Throws:

AxionException

resolveSelectableList

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

Throws:

AxionException

resolveSelectableList

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

Throws:

AxionException

setBindVariableVisitor

protected final void setBindVariableVisitor(FindBindVariableVisitor visitor)

setDeferAllConstraintIfRequired

protected void setDeferAllConstraintIfRequired(Table table)

setEffectedRowCount

protected final 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)

setResultSet

protected final void setResultSet(java.sql.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()

updateGeneratedValues

protected void updateGeneratedValues(Database db,
                                     Table table,
                                     TableIdentifier tableId,
                                     Row row)
                              throws AxionException

Throws:

AxionException