Package org.apache.cayenne.access.translator.ejbql

Class EJBQLJoinAppender

java.lang.Object

org.apache.cayenne.access.translator.ejbql.EJBQLJoinAppender

public class EJBQLJoinAppender
extends Object

Handles appending joins to the content buffer at a marked position.

Since:

3.0

Field Summary

Fields

Modifier and Type	Field	Description
protected EJBQLTranslationContext	context

Constructor Summary

Constructors

Constructor	Description
EJBQLJoinAppender(EJBQLTranslationContext context)

Method Summary

Modifier and Type	Method	Description
void	appendInnerJoin(String marker, org.apache.cayenne.access.translator.ejbql.EJBQLTableId lhsId, org.apache.cayenne.access.translator.ejbql.EJBQLTableId rhsId)
protected void	appendJoin(String marker, org.apache.cayenne.access.translator.ejbql.EJBQLTableId lhsId, org.apache.cayenne.access.translator.ejbql.EJBQLTableId rhsId, String semantics)
void	appendOuterJoin(String marker, org.apache.cayenne.access.translator.ejbql.EJBQLTableId lhsId, org.apache.cayenne.access.translator.ejbql.EJBQLTableId rhsId)
String	appendTable(org.apache.cayenne.access.translator.ejbql.EJBQLTableId id)
String	registerReusableJoin(String sourceIdPath, String relationship, String targetId)	Registers a "reusable" join, returning a preexisting ID if the join is already registered.

Methods inherited from class java.lang.Object

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

Field Detail

context

protected EJBQLTranslationContext context

Constructor Detail

EJBQLJoinAppender

public EJBQLJoinAppender(EJBQLTranslationContext context)

Method Detail

registerReusableJoin

public String registerReusableJoin(String sourceIdPath,
                                   String relationship,
                                   String targetId)

Registers a "reusable" join, returning a preexisting ID if the join is already registered. Reusable joins are the implicit inner joins that are added as a result of processing of path expressions in SELECT or WHERE clauses. Note that if an implicit INNER join overlaps with an explicit INNER join, both joins are added to the query.

appendInnerJoin

public void appendInnerJoin(String marker,
                            org.apache.cayenne.access.translator.ejbql.EJBQLTableId lhsId,
                            org.apache.cayenne.access.translator.ejbql.EJBQLTableId rhsId)

appendOuterJoin

public void appendOuterJoin(String marker,
                            org.apache.cayenne.access.translator.ejbql.EJBQLTableId lhsId,
                            org.apache.cayenne.access.translator.ejbql.EJBQLTableId rhsId)

appendJoin

protected void appendJoin(String marker,
                          org.apache.cayenne.access.translator.ejbql.EJBQLTableId lhsId,
                          org.apache.cayenne.access.translator.ejbql.EJBQLTableId rhsId,
                          String semantics)

appendTable

public String appendTable(org.apache.cayenne.access.translator.ejbql.EJBQLTableId id)