mdbtools.dbengine.tasks

Class FilterData

java.lang.Object

mdbtools.dbengine.tasks.FilterData

All Implemented Interfaces:

Task

public class FilterData
extends Object
implements Task

filter a given result set by a given constraint

Field Summary

Fields

Modifier and Type	Field and Description
private MemoryData	result
private int[]	tableMap
private Task	task
private Object	where

Constructor Summary

Constructors

Constructor and Description
FilterData(Task task, Object where, int[] tableMap)

Method Summary

Methods

Modifier and Type	Method and Description
Object	getResult()
private Object	resolveColumn(Data data, Object column)
void	run()
private boolean	whereCheckRow(Data data, Object where) Check the where constraint against a single row
private boolean	whereCheckRowConditon(Data data, Condition condition) Check a condition portion of the where constraint against a single row left and right of conditon is either another condition or an equation
private boolean	whereCheckRowEquation(Data data, Equation eq) Check an equation portion of the where contraints against a single row

Methods inherited from class java.lang.Object

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

Field Detail

result

private MemoryData result

where

private Object where

task

private Task task

tableMap

private int[] tableMap

Constructor Detail

FilterData

public FilterData(Task task,
          Object where,
          int[] tableMap)

Method Detail

run

public void run()
         throws SQLException

Specified by:

run in interface Task

Throws:

SQLException

getResult

public Object getResult()

Specified by:

getResult in interface Task

whereCheckRow

private boolean whereCheckRow(Data data,
                    Object where)
                       throws SQLException

Check the where constraint against a single row

Parameters:

data -

where -

Returns:

boolean

Throws:

SQLException

whereCheckRowEquation

private boolean whereCheckRowEquation(Data data,
                            Equation eq)
                               throws SQLException

Check an equation portion of the where contraints against a single row

Parameters:

data -

eq -

Returns:

boolean

Throws:

SQLException

whereCheckRowConditon

private boolean whereCheckRowConditon(Data data,
                            Condition condition)
                               throws SQLException

Check a condition portion of the where constraint against a single row left and right of conditon is either another condition or an equation

Parameters:

data -

condition -

Returns:

boolean

Throws:

SQLException

resolveColumn

private Object resolveColumn(Data data,
                   Object column)
                      throws SQLException

Throws:

SQLException