Package org.apache.cayenne.access.translator.select

Class OrderingTranslator

java.lang.Object

org.apache.cayenne.access.translator.select.QueryAssemblerHelper

org.apache.cayenne.access.translator.select.OrderingTranslator

public class OrderingTranslator
extends QueryAssemblerHelper

Translates query ordering to SQL.

Field Summary

Fields

Modifier and Type	Field	Description
protected List<String>	orderByColumnList

Fields inherited from class org.apache.cayenne.access.translator.select.QueryAssemblerHelper

out, queryAssembler, strategy

Constructor Summary

Constructors

Constructor	Description
OrderingTranslator(QueryAssembler queryAssembler)

Method Summary

Modifier and Type	Method	Description
protected void	appendFunction(Expression exp)
protected void	doAppendPart()	Translates query Ordering list to SQL ORDER BY clause.
List<String>	getOrderByColumnList()	Returns the column expressions (not Expressions) used in the order by clause.

Methods inherited from class org.apache.cayenne.access.translator.select.QueryAssemblerHelper

appendDbPath, appendLikeEscapeCharacter, appendLiteral, appendLiteralDirect, appendObjPath, appendPart, getDbEntity, getObjEntity, paramsDbType, processColumn, processColumnWithQuoteSqlIdentifiers, processRelTermination, processRelTermination, setForceJoinForRelations

Methods inherited from class java.lang.Object

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

Field Details

orderByColumnList

protected List<String> orderByColumnList

Constructor Details

OrderingTranslator

public OrderingTranslator(QueryAssembler queryAssembler)

Method Details

doAppendPart

protected void doAppendPart()

Translates query Ordering list to SQL ORDER BY clause. Ordering list is obtained from queryAssembler's query object. In a process of building of ORDER BY clause, queryAssembler is notified when a join needs to be added.

Specified by:

doAppendPart in class QueryAssemblerHelper

Since:

3.0

appendFunction

protected void appendFunction(Expression exp)

getOrderByColumnList

public List<String> getOrderByColumnList()

Returns the column expressions (not Expressions) used in the order by clause. E.g., in the case of an case-insensitive order by, an element of the list would be UPPER(<column reference>)