com.goldencode.p2j.persist

Class BufferImpl.FillWorker

java.lang.Object

com.goldencode.p2j.persist.BufferImpl.FillWorker

Enclosing class:

BufferImpl

private class BufferImpl.FillWorker
extends java.lang.Object

FILL operation worker.

Field Summary

Fields

Modifier and Type	Field and Description
private logical	fillOk FILL result
private boolean	isAppend FILL in append mode flag
private boolean	isMerge FILL in merge mode flag
private boolean	isReplace FILL in replace mode flag
private RecordBuffer	recBuf Target record buffer
private handle	self Buffer handle
private BufferImpl	selfBuf Buffer reference
private int	srcBufCount Number of source buffers
private BufferImpl[]	srcBuffs Source buffers

Constructor Summary

Constructors

Modifier	Constructor and Description
private	FillWorker()

Method Summary

Modifier and Type	Method and Description
logical	fill() Fill the target DATA-SET.
private boolean	fillRow(P2JQuery fillQuery, logical hasMore, RecordBuffer dstBuffer, java.util.Map<java.lang.String,BufferImpl.FieldStructure> fields) Populate the target record by iterating the data-source mapping and copying values between paired fields.
private void	flushAll() Flush buffers
private void	initBuffers() Initialize buffers
private void	processDataSource(P2JQuery fillQuery, java.util.List<DataRelation> childRelations, boolean open, boolean close) Process the DATA-SOURCE.
private java.lang.Boolean	secondPassRequired(DataRelation relation, P2JQuery fillQuery) Check if second pass is required (for recursive relation)

Methods inherited from class java.lang.Object

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

Field Detail

selfBuf

private final BufferImpl selfBuf

Buffer reference

self

private final handle self

Buffer handle

fillOk

private final logical fillOk

FILL result

isAppend

private final boolean isAppend

FILL in append mode flag

isMerge

private final boolean isMerge

FILL in merge mode flag

isReplace

private final boolean isReplace

FILL in replace mode flag

srcBufCount

private int srcBufCount

Number of source buffers

srcBuffs

private BufferImpl[] srcBuffs

Source buffers

recBuf

private RecordBuffer recBuf

Target record buffer

Constructor Detail

FillWorker

private FillWorker()

Method Detail

fill

public logical fill()

Fill the target DATA-SET.

Returns:

'true' on success

secondPassRequired

private java.lang.Boolean secondPassRequired(DataRelation relation,
                                             P2JQuery fillQuery)

Check if second pass is required (for recursive relation)

Parameters:

relation - The relation to be processed.

fillQuery - The source query for the FILL operation.

Returns:

Boolean.TRUE if second pass is required.

processDataSource

private void processDataSource(P2JQuery fillQuery,
                               java.util.List<DataRelation> childRelations,
                               boolean open,
                               boolean close)

Process the DATA-SOURCE.

Parameters:

fillQuery - The source query for the FILL operation.

childRelations - The list of child relations.

open - Flag indicating that the fill query needs to be opened.

close - Flag indicating that the fill query needs to be closed.

initBuffers

private void initBuffers()

Initialize buffers

fillRow

private boolean fillRow(P2JQuery fillQuery,
                        logical hasMore,
                        RecordBuffer dstBuffer,
                        java.util.Map<java.lang.String,BufferImpl.FieldStructure> fields)

Populate the target record by iterating the data-source mapping and copying values between paired fields.

Parameters:

fillQuery - The source query.

hasMore - Flag indicating that more records are available.

dstBuffer - The destination record buffer.

fields - A map of resolved BufferImpl.FieldStructure for each destination field.

Returns:

true on success.

flushAll

private void flushAll()

Flush buffers