org.openstreetmap.josm.gui.mappaint.mapcss

Interface Expression

All Known Implementing Classes:

ExpressionFactory.AndOperator, ExpressionFactory.ArrayFunction, ExpressionFactory.CondOperator, ExpressionFactory.LengthFunction, ExpressionFactory.MinMaxFunction, ExpressionFactory.NullExpression, ExpressionFactory.OrOperator, ExpressionFactory.ParameterFunction, LiteralExpression

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Expression

A MapCSS Expression. Can be evaluated in a certain Environment. Usually takes parameters, that are also Expressions and have to be evaluated first.

Since:

3848 (creation), 10600 (functional interface)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(Environment env) Evaluate this expression.

Method Detail

evaluate

java.lang.Object evaluate(Environment env)

Evaluate this expression.

Parameters:

env - The environment

Returns:

the result of the evaluation, can be a List, String or any primitive type or wrapper classes of a primitive type.