org.apache.openjpa.persistence.query

Class AbstractVisitable

java.lang.Object

org.apache.openjpa.persistence.query.AbstractVisitable

All Implemented Interfaces:

java.io.Serializable, Visitable

Direct Known Subclasses:

BinaryExpressionPredicate, ExpressionImpl, LogicalPredicate, NewInstance, OrderableItem, UnaryExpressionPredicate

abstract class AbstractVisitable
extends java.lang.Object
implements Visitable

An abstract implementation that throws UnsupportedOperationException on every method.

Author:

Pinaki Poddar

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CLOSE_BRACE
static java.lang.String	COMMA
static java.lang.String	EMPTY
static java.lang.String	OPEN_BRACE
static java.lang.String	SPACE

Constructor Summary

Constructors

Constructor and Description
AbstractVisitable()

Method Summary

Methods

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

Methods inherited from class java.lang.Object

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

Field Detail

SPACE

public static final java.lang.String SPACE

See Also:

Constant Field Values

OPEN_BRACE

public static final java.lang.String OPEN_BRACE

See Also:

Constant Field Values

CLOSE_BRACE

public static final java.lang.String CLOSE_BRACE

See Also:

Constant Field Values

COMMA

public static final java.lang.String COMMA

See Also:

Constant Field Values

EMPTY

public static final java.lang.String EMPTY

See Also:

Constant Field Values

Constructor Detail

AbstractVisitable

AbstractVisitable()

Method Detail

asExpression

public java.lang.String asExpression(AliasContext ctx)

Description copied from interface: Visitable

Get a JPQL fragment as used in WHERE clause.

Specified by:

asExpression in interface Visitable

asProjection

public java.lang.String asProjection(AliasContext ctx)

Description copied from interface: Visitable

Gets the string representation in SELECT projection.

Specified by:

asProjection in interface Visitable

getAliasHint

public java.lang.String getAliasHint(AliasContext ctx)

Description copied from interface: Visitable

Gets the hint to be used while creating alias.

Specified by:

getAliasHint in interface Visitable

asJoinable

public java.lang.String asJoinable(AliasContext ctx)

Description copied from interface: Visitable

Gets the string representation in FROM clause.

Specified by:

asJoinable in interface Visitable