#119 Add SimpleConnectionInstance to model

js/geppettoModel/model/SimpleConnectionInstance.js

@@ -0,0 +1,55 @@
+import Instance from './Instance';
+
+export default class SimpleConnectionInstance extends Instance{
+  constructor (node) {
+    super(node);
+    this.value = node.value;
+    this.type = node.type;
+    this.visualValue = node.visualValue;
+    this.a = node.a;
+    this.b = node.b
+    this.tags = node.tags;
+    this.wrappedObj = node;
+    this._metaType = node.eClass;
+  }
+
+  getTypes () {
+    return [this.getType()];
+  }
+
+  getValues () {
+    return [this.getValue()];
+  }
+
+  getType () {
+    return this.type;
+  }
+
+  getValue () {
+    return this.value;
+  }
+
+  getVisualValue () {
+    return this.visualValue;
+  }
+
+  hasVisualValue () {
+    return this.visualValue;
+  }
+
+  getPoint () {
+    return this.point;
+  }
+
+  hasVisualType () {
+    throw "Simple connection instances don't support visual type: use hasVisualValue instead";
+  }
+
+  getVisualType () {
+    throw "Simple connection instances don't support visual type: use getVisualValue instead";
+  }
+
+  getVariable () {
+    throw "Simple instances don't support variables";
+  }
+}