org.apache.openjpa.persistence.query
Class UnaryExpressionPredicate

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

All Implemented Interfaces:

Serializable, Predicate, Visitable

Direct Known Subclasses:

ExistsExpression, IsEmptyExpression, IsNullExpression

 class UnaryExpressionPredicate
extends AbstractVisitable
implements Predicate, Visitable

Unary Predicate results from an operator on an Expression.

Author:

Pinaki Poddar

Field Summary

protected Expression	_e
protected UnaryConditionalOperator	_op

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

CLOSE_BRACE, COMMA, EMPTY, OPEN_BRACE, SPACE

Constructor Summary

UnaryExpressionPredicate(Expression e, UnaryConditionalOperator op, UnaryConditionalOperator nop)

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.
Expression	getOperand()
UnaryConditionalOperator	getOperator()
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

Field Detail

_e

protected final Expression _e

_op

protected final UnaryConditionalOperator _op

Constructor Detail

UnaryExpressionPredicate

public UnaryExpressionPredicate(Expression e,
                                UnaryConditionalOperator op,
                                UnaryConditionalOperator nop)

Method Detail

getOperand

public Expression getOperand()

getOperator

public UnaryConditionalOperator getOperator()

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