Package io.jmix.aitools.dataload.execution

Class JpqlLeftJoinSupport

java.lang.Object

io.jmix.aitools.dataload.execution.JpqlLeftJoinSupport

@Component("aitls_JpqlLeftJoinSupport")
public class JpqlLeftJoinSupport
extends Object

Narrows the left joins of a data-load query in their own on clause, so that a record hidden from the current user is joined as an absent one instead of removing the row. The public QueryTransformer can only add to the where, so this rewrites the parser's syntax tree.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	JpqlLeftJoinSupport.Rewrite	Changes to one query, applied to its syntax tree in the order they are made.

Field Summary

Fields

Modifier and Type	Field	Description
protected JpqlDeclarationSupport	declarationSupport

Constructor Summary

Constructors

Constructor	Description
JpqlLeftJoinSupport()

Method Summary

Modifier and Type	Method	Description
JpqlLeftJoinSupport.Rewrite	rewrite(String jpql)	Starts a rewrite of the query.

Methods inherited from class java.lang.Object

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

Field Details

declarationSupport

@Autowired
protected JpqlDeclarationSupport declarationSupport

Constructor Details

JpqlLeftJoinSupport

public JpqlLeftJoinSupport()

Method Details

rewrite

public JpqlLeftJoinSupport.Rewrite rewrite(String jpql)

Starts a rewrite of the query.

Parameters:

jpql - query text the JPQL parser can read

Returns:

the rewrite; its result is the query text with every change applied

Throws:

JPA2RecognitionException - if the JPQL parser cannot read the text