org.apache.openjpa.persistence.query

Interface Visitable

All Superinterfaces:

Serializable

All Known Implementing Classes:

AbsExpression, AbstractDomainObject, AndPredicate, ArrayExpression, AverageExpression, BetweenExpression, BinaryOperatorExpression, CaseExpressionImpl, ConcatExpression, CountExpression, CurrentTimeExpression, DistinctExpression, DividedByExpression, ElseExpression, EntryExpression, EqualExpression, ExistsExpression, FetchPath, GreaterEqualExpression, GreaterThanExpression, IndexExpression, InExpression, IsEmptyExpression, IsNullExpression, JoinPath, KeyExpression, LengthExpression, LessEqualExpression, LessThanExpression, LikeExpression, LiteralExpression, LocateExpression, LogicalPredicate, LowerExpression, MaxExpression, MemberOfExpression, MinExpression, MinusExpression, NewInstance, NotEqualExpression, OperatorPath, OrderableItem, OrPredicate, ParameterExpression, PlusExpression, QueryDefinitionImpl, RangeExpression, RootPath, SizeExpression, SquareRootExpression, SubStringExpression, SumExpression, TimesExpression, TrimExpression, TypeExpression, UnaryMinusExpression, UpperExpression, ValueExpression, VarArgsExpression

public interface Visitable
extends Serializable

An element of query that is convertible to a JPQL String given a aliasing scheme. QueryDefinition visits each of its element and translates them.

Author:

Pinaki Poddar

Method Summary

Modifier and Type	Method and Description
String	asExpression(org.apache.openjpa.persistence.query.AliasContext ctx) Get a JPQL fragment as used in WHERE clause.
String	asJoinable(org.apache.openjpa.persistence.query.AliasContext ctx) Gets the string representation in FROM clause.
String	asProjection(org.apache.openjpa.persistence.query.AliasContext ctx) Gets the string representation in SELECT projection.
String	getAliasHint(org.apache.openjpa.persistence.query.AliasContext ctx) Gets the hint to be used while creating alias.

Method Detail

asExpression

String asExpression(org.apache.openjpa.persistence.query.AliasContext ctx)

Get a JPQL fragment as used in WHERE clause.

asProjection

String asProjection(org.apache.openjpa.persistence.query.AliasContext ctx)

Gets the string representation in SELECT projection.

asJoinable

String asJoinable(org.apache.openjpa.persistence.query.AliasContext ctx)

Gets the string representation in FROM clause.

getAliasHint

String getAliasHint(org.apache.openjpa.persistence.query.AliasContext ctx)

Gets the hint to be used while creating alias.