org.apache.openjpa.persistence.query
Class AbstractVisitable

java.lang.Object
  org.apache.openjpa.persistence.query.AbstractVisitable

All Implemented Interfaces:

Serializable, Visitable

Direct Known Subclasses:

BinaryExpressionPredicate, ExpressionImpl, LogicalPredicate, NewInstance, OrderableItem, UnaryExpressionPredicate

abstract class AbstractVisitable
extends Object
implements Visitable

An abstract implementation that throws UnsupportedOperationException on every method.

Author:

Pinaki Poddar

Field Summary

static String	CLOSE_BRACE
static String	COMMA
static String	EMPTY
static String	OPEN_BRACE
static String	SPACE

Constructor Summary

AbstractVisitable()

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.

Methods inherited from class java.lang.Object

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

Field Detail

SPACE

public static final String SPACE

See Also:

Constant Field Values

OPEN_BRACE

public static final String OPEN_BRACE

See Also:

Constant Field Values

CLOSE_BRACE

public static final String CLOSE_BRACE

See Also:

Constant Field Values

COMMA

public static final String COMMA

See Also:

Constant Field Values

EMPTY

public static final String EMPTY

See Also:

Constant Field Values

Constructor Detail

AbstractVisitable

AbstractVisitable()

Method Detail

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

asProjection

public String asProjection(AliasContext ctx)

Description copied from interface: Visitable

Gets the string representation in SELECT projection.

Specified by:

asProjection in interface Visitable

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

asJoinable

public String asJoinable(AliasContext ctx)

Description copied from interface: Visitable

Gets the string representation in FROM clause.

Specified by:

asJoinable in interface Visitable