org.apache.openjpa.persistence.query
Class LogicalPredicate

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

All Implemented Interfaces:

Serializable, Predicate, Visitable

Direct Known Subclasses:

AndPredicate, OrPredicate

public class LogicalPredicate
extends AbstractVisitable
implements Predicate, Visitable

Logical Predicate combines two predicates with a logical operator.

Author:

Pinaki Poddar

See Also:

Serialized Form

Field Summary

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

CLOSE_BRACE, COMMA, EMPTY, OPEN_BRACE, SPACE

Constructor Summary

LogicalPredicate(Predicate p1, ConditionalOperator op, ConditionalOperator nop, Predicate p2)

Method Summary

Predicate	and(Predicate predicate) Creates an AND of the predicate with the argument.
String	asExpression(AliasContext ctx) Get a JPQL fragment as used in WHERE clause.
Predicate	not() Creates a negation of the predicate with the argument.
Predicate	or(Predicate predicate) Creates an OR of the predicate with the argument.

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

asJoinable, asProjection, getAliasHint

Methods inherited from class java.lang.Object

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

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

asJoinable, asProjection, getAliasHint

Constructor Detail

LogicalPredicate

public LogicalPredicate(Predicate p1,
                        ConditionalOperator op,
                        ConditionalOperator nop,
                        Predicate p2)

Method Detail

and

public Predicate and(Predicate predicate)

Description copied from interface: Predicate

Creates an AND of the predicate with the argument.

Specified by:

and in interface Predicate

Parameters:

predicate - - A simple or compound predicate

Returns:

the predicate that is the AND of the original simple or compound predicate and the argument.

or

public Predicate or(Predicate predicate)

Description copied from interface: Predicate

Creates an OR of the predicate with the argument.

Specified by:

or in interface Predicate

Parameters:

predicate - - A simple or compound predicate

Returns:

the predicate that is the OR of the original simple or compound predicate and the argument.

not

public Predicate not()

Description copied from interface: Predicate

Creates a negation of the predicate with the argument.

Specified by:

not in interface Predicate

Returns:

the predicate that is the negation of the original simple or compound predicate.

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