From 484016abbba559b32f67b15755f4fbc805f81b42 Mon Sep 17 00:00:00 2001
From: villberg <villberg@ac1ea38d-2e2b-0410-8846-a27921b304fc>
Date: Tue, 26 Aug 2014 11:59:08 +0000
Subject: [PATCH] refs #5224

git-svn-id: https://www.simantics.org/svn/simantics/sysdyn/trunk@30141 ac1ea38d-2e2b-0410-8846-a27921b304fc
---
 .../fi/semantum/sysdyn/solver/Negation.java   | 25 ++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/fi.semantum.sysdyn.solver/src/fi/semantum/sysdyn/solver/Negation.java b/fi.semantum.sysdyn.solver/src/fi/semantum/sysdyn/solver/Negation.java
index 8cdad84e..97959451 100644
--- a/fi.semantum.sysdyn.solver/src/fi/semantum/sysdyn/solver/Negation.java
+++ b/fi.semantum.sysdyn.solver/src/fi/semantum/sysdyn/solver/Negation.java
@@ -12,6 +12,8 @@ package fi.semantum.sysdyn.solver;
 
 import java.util.Map;
 
+import fi.semantum.sysdyn.solver.Array.Modifier;
+
 public class Negation implements IExpression {
 	
     public IExpression exp;
@@ -27,9 +29,26 @@ public class Negation implements IExpression {
     
 	@Override
 	public Object evaluate(IEnvironment environment) {
-		Double d = (Double)exp.evaluate(environment);
-		if(d == null) return null;
-		return -d;
+		Object value = exp.evaluate(environment);
+		if(value == null) return null;
+		if(value instanceof Double) {
+			return -((Double)value); 
+		} else if(value instanceof Array) {
+			return ((Array)value).copy(new Modifier() {
+
+				@Override
+				public Object modify(Object o) {
+					if(o instanceof Double) {
+						return -((Double)o); 
+					} else {
+						throw new IllegalStateException();
+					}
+				}
+				
+			});
+		} else {
+			throw new IllegalStateException();
+		}
 	}
     
 	@Override
-- 
2.47.1