org.apache.openjpa.persistence.query
Class LogicalPredicate

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


Copyright © 2006-2011 Apache Software Foundation. All Rights Reserved.