de.espirit.or.query

Interface Constraint

All Superinterfaces:

Cloneable, Serializable

All Known Subinterfaces:

AttributeConstraint

All Known Implementing Classes:

AbstractConstraint, And, Compare, ComposedConstraint, Equal, GreaterThan, GreaterThanEqual, In, IsNotNull, IsNull, LessThan, LessThanEqual, Like, NotEqual, Or

public interface Constraint
extends Cloneable, Serializable

Interface for all filters which are used to restrict the result of aSelect.

Since:

4.0.17

See Also:

Select.setConstraint(Constraint), Select.getConstraint()

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Constraint.Type Enum specifiying the type of the constraint.

Method Summary

Methods

Modifier and Type	Method and Description
Constraint.Type	getType() Returns the type of this constraint.
boolean	isEmpty() Check if this is an empty constraint.

Method Detail

getType

Constraint.Type getType()

Returns the type of this constraint.

Since:

5.0.100

isEmpty

boolean isEmpty()

Check if this is an empty constraint. Empty constraints could be omitted without changing the query result.

Returns:

true if the constraint is empty, i.e. removing the constraint would not change the query result.

Since:

5.0.102