com.aspc.DBObj.Internal

Class Hint

java.lang.Object

com.aspc.DBObj.Internal.Hint

Direct Known Subclasses:

HintData, HintField

public abstract class Hint
extends java.lang.Object

Hint of what other rows will be required. THREAD MODE: SINGLE-THREADED non shared

Since:

13 June 2002

Author:

Nigel Leck

Field Summary

Fields

Modifier and Type	Field and Description
protected long	excludeRow the exclude row
protected VirtualDB	layer the layer
PossibleRowsHolder	orginalRowsHolder the rows UNSORTED & SHARED
protected long	requiredTransaction the required transactions
protected GlobalKeyId	rootId the root id

Constructor Summary

Constructors

Constructor and Description
Hint(GlobalKeyId rootId, VirtualDB layer, long excludeRow, long[] unsortedRows, long requiredTransaction)
Hint(GlobalKeyId rootId, VirtualDB layer, long excludeRow, PossibleRowsHolder pr, long requiredTransaction)

Method Summary

Modifier and Type	Method and Description
boolean	assertCheck(VirtualDB checkLayer) Check that the hint is valid for this layer.
abstract void	clear(long rowId)
abstract long[][]	getData() The rows that will be asked for later
protected abstract void	init() initial
static Hint	makeLayerHint(VirtualDB layer, Hint hint)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

rootId

protected final GlobalKeyId rootId

the root id

layer

protected final VirtualDB layer

the layer

excludeRow

protected final long excludeRow

the exclude row

orginalRowsHolder

public final PossibleRowsHolder orginalRowsHolder

the rows UNSORTED & SHARED

requiredTransaction

protected final long requiredTransaction

the required transactions

Constructor Detail

Hint

public Hint(@Nonnull
            GlobalKeyId rootId,
            @Nonnull
            VirtualDB layer,
            long excludeRow,
            @Nonnull
            PossibleRowsHolder pr,
            long requiredTransaction)

Parameters:

rootId -

layer - the layer

excludeRow -

pr -

requiredTransaction -

Hint

public Hint(@Nonnull
            GlobalKeyId rootId,
            @Nonnull
            VirtualDB layer,
            long excludeRow,
            @Nonnull
            long[] unsortedRows,
            long requiredTransaction)

Parameters:

rootId -

layer - the layer

excludeRow -

unsortedRows -

requiredTransaction -

Method Detail

makeLayerHint

public static Hint makeLayerHint(@Nonnull
                                 VirtualDB layer,
                                 @Nullable
                                 Hint hint)

assertCheck

public boolean assertCheck(@Nonnull
                           VirtualDB checkLayer)

Check that the hint is valid for this layer.

Parameters:

checkLayer -

Returns:

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

init

protected abstract void init()

initial

getData

@CheckReturnValue
 @Nonnull
public abstract long[][] getData()

The rows that will be asked for later

Returns:

the value

clear

public abstract void clear(long rowId)

Parameters:

rowId -