Module org.opengis.geoapi

Package org.opengis.filter

Interface ComparisonOperator<R>

Type Parameters:

R - the type of resources (e.g. Feature) to filter.

All Superinterfaces:

Filter<R>, Predicate<R>

All Known Subinterfaces:

BetweenComparisonOperator<R>, BinaryComparisonOperator<R>, LikeOperator<R>, NilOperator<R>, NullOperator<R>

@Classifier(ABSTRACT)
@UML(identifier="ComparisonOperator",
     specification=ISO_19143)
public interface ComparisonOperator<R>
extends Filter<R>

An operator that evaluates the mathematical comparison between arguments. If the arguments satisfy the comparison then the operator evaluates to true. Otherwise the operator evaluates to false.

The arguments are given as expressions. The number of expressions depends on the sub-type:

• NullOperator and NilOperator expect one expression.
• BinaryComparisonOperator and LikeOperator expect two expressions.
• BetweenComparisonOperator expects three expressions.

Since:

3.1

Method Summary

Modifier and Type	Method	Description
ComparisonOperatorName	getOperatorType()	Returns the nature of the comparison.

Methods inherited from interface Filter

getExpressions, test

Methods inherited from interface Predicate

and, negate, or

Method Details

getOperatorType

@UML(identifier="BinaryComparisonOperator.operatorType",
     obligation=MANDATORY,
     specification=ISO_19143)
ComparisonOperatorName getOperatorType()

Returns the nature of the comparison. A standard set of comparison operators is equal to, less than, greater than, less than or equal to, greater than or equal to and not equal to.

Specified by:

getOperatorType in interface Filter<R>

Returns:

the nature of the comparison.