com.avaje.ebeaninternal.server.query

Class SqlTreeNodeExtraJoin

java.lang.Object

com.avaje.ebeaninternal.server.query.SqlTreeNodeExtraJoin

All Implemented Interfaces:

SqlTreeNode

public class SqlTreeNodeExtraJoin
extends Object
implements SqlTreeNode

The purpose is to add an extra join to the query.

This is used to support the where clause or order by clause that refers to properties that are NOT included in the select. To support the where clause etc in this case we must add an extra join.

Field Summary

Fields inherited from interface com.avaje.ebeaninternal.server.query.SqlTreeNode

COMMA, NORMAL, PERIOD, READONLY, SHARED

Constructor Summary

Constructors

Constructor and Description
SqlTreeNodeExtraJoin(String prefix, BeanPropertyAssoc<?> assocBeanProperty)

Method Summary

Methods

Modifier and Type	Method and Description
void	addChild(SqlTreeNodeExtraJoin child)
void	appendFrom(DbSqlContext ctx, boolean forceOuterJoin) Append to the FROM part of the sql.
void	appendSelect(DbSqlContext ctx, boolean subQuery) Does nothing.
void	appendWhere(DbSqlContext ctx) Does nothing.
void	buildSelectExpressionChain(List<String> selectChain)
String	getName()
boolean	isManyJoin() Return true if the extra join is a many join.
void	load(DbReadContext ctx, Object parentBean) Does nothing.

Methods inherited from class java.lang.Object

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

Constructor Detail

SqlTreeNodeExtraJoin

public SqlTreeNodeExtraJoin(String prefix,
                    BeanPropertyAssoc<?> assocBeanProperty)

Method Detail

buildSelectExpressionChain

public void buildSelectExpressionChain(List<String> selectChain)

Specified by:

buildSelectExpressionChain in interface SqlTreeNode

isManyJoin

public boolean isManyJoin()

Return true if the extra join is a many join.

This means we need to add distinct to the sql query.

getName

public String getName()

addChild

public void addChild(SqlTreeNodeExtraJoin child)

appendFrom

public void appendFrom(DbSqlContext ctx,
              boolean forceOuterJoin)

Description copied from interface: SqlTreeNode

Append to the FROM part of the sql.

Specified by:

appendFrom in interface SqlTreeNode

appendSelect

public void appendSelect(DbSqlContext ctx,
                boolean subQuery)

Does nothing.

Specified by:

appendSelect in interface SqlTreeNode

appendWhere

public void appendWhere(DbSqlContext ctx)

Does nothing.

Specified by:

appendWhere in interface SqlTreeNode

load

public void load(DbReadContext ctx,
        Object parentBean)
          throws SQLException

Does nothing.

Specified by:

load in interface SqlTreeNode

Throws:

SQLException