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 java.lang.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 java.util.List<Expression>	args
private java.lang.Class<?>[]	expectedParameterTypes
private java.lang.reflect.Method	m
private boolean	needsEnvironment
private boolean	nullable

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Detail

m

private final java.lang.reflect.Method m

nullable

private final boolean nullable

args

private final java.util.List<Expression> args

expectedParameterTypes

private final java.lang.Class<?>[] expectedParameterTypes

needsEnvironment

private final boolean needsEnvironment

Constructor Detail

ParameterFunction

public ParameterFunction(java.lang.reflect.Method m,
                         java.util.List<Expression> args,
                         boolean needsEnvironment)

Constructs a new ParameterFunction.

Method Detail

evaluate

public java.lang.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 java.lang.String toString()

Overrides:

toString in class java.lang.Object