org.apache.openjpa.persistence.query
Class JoinPath

java.lang.Object
  org.apache.openjpa.persistence.query.AbstractVisitable
      org.apache.openjpa.persistence.query.ExpressionImpl
          org.apache.openjpa.persistence.query.AbstractPath
              org.apache.openjpa.persistence.query.AbstractDomainObject
                  org.apache.openjpa.persistence.query.JoinPath

All Implemented Interfaces:

Serializable, DomainObject, Expression, OrderByItem, PathExpression, PredicateOperand, QueryDefinition, SelectItem, Subquery, Visitable

public class JoinPath
extends AbstractDomainObject
implements DomainObject

Path resulting by joining from a parent path via an attribute.

Author:

Pinaki Poddar

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.openjpa.persistence.query.AbstractPath

_operator, _owner, _parent, _part2

Fields inherited from class org.apache.openjpa.persistence.query.AbstractVisitable

CLOSE_BRACE, COMMA, EMPTY, OPEN_BRACE, SPACE

Constructor Summary

JoinPath(AbstractDomainObject parent, PathOperator join, String attr)

Method Summary

String	asExpression(AliasContext ctx) Get a JPQL fragment as used in WHERE clause.
String	asJoinable(AliasContext ctx) Gets the string representation in FROM clause.
String	asProjection(AliasContext ctx) Gets the string representation in SELECT projection.
String	getAliasHint(AliasContext ctx) Gets the hint to be used while creating alias.
String	getLastSegment() Gets the last segment of this path.
AbstractDomainObject	getParent() Gets the parent from which this receiver has been derived.
String	toString()

Methods inherited from class org.apache.openjpa.persistence.query.AbstractDomainObject

addRoot, addSubqueryRoot, all, any, coalesce, coalesce, coalesce, coalesce, currentDate, currentTime, currentTimestamp, entry, exists, generalCase, get, groupBy, groupBy, having, index, join, joinFetch, key, leftJoin, leftJoinFetch, literal, literal, literal, literal, literal, literal, literal, literal, newInstance, nullif, nullif, nullif, nullif, nullif, nullif, nullif, nullLiteral, orderBy, orderBy, param, predicate, select, select, selectDistinct, selectDistinct, simpleCase, simpleCase, simpleCase, simpleCase, simpleCase, simpleCase, simpleCase, some, value, where

Methods inherited from class org.apache.openjpa.persistence.query.AbstractPath

avg, count, getOperator, getOwner, isEmpty, max, min, size, split, sum, type

Methods inherited from class org.apache.openjpa.persistence.query.ExpressionImpl

abs, asc, between, between, between, between, between, between, between, between, between, between, between, between, between, concat, concat, desc, dividedBy, dividedBy, equal, equal, equal, equal, equal, equal, equal, equal, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, in, in, in, in, in, in, isNull, length, lessEqual, lessEqual, lessEqual, lessEqual, lessEqual, lessThan, lessThan, lessThan, lessThan, lessThan, like, like, like, like, like, like, locate, locate, locate, locate, locate, locate, lower, member, minus, minus, minus, mod, mod, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, plus, plus, sqrt, substring, substring, substring, substring, substring, substring, times, times, trim, trim, trim, trim, trim, trim, upper

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.openjpa.persistence.query.DomainObject

entry, index, join, joinFetch, key, leftJoin, leftJoinFetch, value

Methods inherited from interface org.apache.openjpa.persistence.query.PathExpression

avg, count, get, isEmpty, max, min, size, sum, type

Methods inherited from interface org.apache.openjpa.persistence.query.Expression

abs, concat, concat, dividedBy, dividedBy, in, in, in, in, in, in, isNull, length, locate, locate, locate, locate, locate, locate, lower, member, minus, minus, minus, mod, mod, plus, plus, sqrt, substring, substring, substring, substring, substring, substring, times, times, trim, trim, trim, trim, trim, trim, upper

Methods inherited from interface org.apache.openjpa.persistence.query.SelectItem

asc, desc

Methods inherited from interface org.apache.openjpa.persistence.query.QueryDefinition

addRoot, addSubqueryRoot, all, any, coalesce, coalesce, coalesce, coalesce, currentDate, currentTime, currentTimestamp, exists, generalCase, groupBy, groupBy, having, literal, literal, literal, literal, literal, literal, literal, literal, newInstance, nullif, nullif, nullif, nullif, nullif, nullif, nullif, nullLiteral, orderBy, orderBy, param, predicate, select, select, selectDistinct, selectDistinct, simpleCase, simpleCase, simpleCase, simpleCase, simpleCase, simpleCase, simpleCase, some, where

Methods inherited from interface org.apache.openjpa.persistence.query.PredicateOperand

between, between, between, between, between, between, between, between, between, between, between, between, between, equal, equal, equal, equal, equal, equal, equal, equal, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, lessEqual, lessEqual, lessEqual, lessEqual, lessEqual, lessThan, lessThan, lessThan, lessThan, lessThan, like, like, like, like, like, like, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual

Constructor Detail

JoinPath

public JoinPath(AbstractDomainObject parent,
                PathOperator join,
                String attr)

Method Detail

getAliasHint

public String getAliasHint(AliasContext ctx)

Description copied from interface: Visitable

Gets the hint to be used while creating alias.

Specified by:

getAliasHint in interface Visitable

Overrides:

getAliasHint in class ExpressionImpl

getLastSegment

public String getLastSegment()

Description copied from class: AbstractPath

Gets the last segment of this path. Concrete implementation should return a covariant type.

Overrides:

getLastSegment in class AbstractPath

getParent

public AbstractDomainObject getParent()

Description copied from class: AbstractPath

Gets the parent from which this receiver has been derived. Can be null for a root path.

Overrides:

getParent in class AbstractPath

asJoinable

public String asJoinable(AliasContext ctx)

Description copied from interface: Visitable

Gets the string representation in FROM clause.

Specified by:

asJoinable in interface Visitable

Overrides:

asJoinable in class AbstractVisitable

asExpression

public String asExpression(AliasContext ctx)

Description copied from interface: Visitable

Get a JPQL fragment as used in WHERE clause.

Specified by:

asExpression in interface Visitable

Overrides:

asExpression in class AbstractVisitable

asProjection

public String asProjection(AliasContext ctx)

Description copied from interface: Visitable

Gets the string representation in SELECT projection.

Specified by:

asProjection in interface Visitable

Overrides:

asProjection in class AbstractVisitable

toString

public String toString()

Overrides:

toString in class Object