org.openstreetmap.josm.gui.mappaint.mapcss

Class ExpressionFactory.ParameterFunction

java.lang.Object

org.openstreetmap.josm.gui.mappaint.mapcss.ExpressionFactory.ParameterFunction

All Implemented Interfaces:

Expression

Enclosing class:

ExpressionFactory

public static class ExpressionFactory.ParameterFunction
extends Object
implements Expression

Function that takes a certain number of argument with specific type. Implementation is based on a Method object. If any of the arguments evaluate to null, the result will also be null.

Field Summary

Fields

Modifier and Type	Field and Description
private List<Expression>	args
private Class<?>[]	expectedParameterTypes
private Method	m
private boolean	needsEnvironment
private boolean	nullable

Constructor Summary

Constructors

Constructor and Description
ParameterFunction(Method m, List<Expression> args, boolean needsEnvironment) Constructs a new ParameterFunction.

Method Summary

Modifier and Type	Method and Description
Object	evaluate(Environment env) Evaluate this expression.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

m

private final Method m

nullable

private final boolean nullable

args

private final List<Expression> args

expectedParameterTypes

private final Class<?>[] expectedParameterTypes

needsEnvironment

private final boolean needsEnvironment

Constructor Detail

ParameterFunction

public ParameterFunction(Method m,
                         List<Expression> args,
                         boolean needsEnvironment)

Constructs a new ParameterFunction.

Parameters:

m - method

args - arguments

needsEnvironment - whether function needs environment

Method Detail

evaluate

public Object evaluate(Environment env)

Description copied from interface: Expression

Evaluate this expression.

Specified by:

evaluate in interface 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.

toString

public String toString()

Overrides:

toString in class Object