1 files changed, 32 insertions, 0 deletions
diff --git a/rba.tool.editor/src/rba/tool/editor/validation/validators/ActiveStateValidator.xtend b/rba.tool.editor/src/rba/tool/editor/validation/validators/ActiveStateValidator.xtend
new file mode 100644
index 0000000..4522163
--- /dev/null
+++ b/rba.tool.editor/src/rba/tool/editor/validation/validators/ActiveStateValidator.xtend
@@ -0,0 +1,32 @@
+package rba.tool.editor.validation.validators
+
+import org.eclipse.xtext.validation.Check
+import org.eclipse.xtext.validation.EValidatorRegistrar
+import rba.core.RBACorePackage
+import rba.tool.editor.messages.Messages
+import rba.tool.editor.validation.AbstractRBAModelValidator
+import rba.core.ExpressionType
+import rba.core.ActiveState
+
+class ActiveStateValidator extends AbstractRBAModelValidator {
+
+	private String OPERAND_SIZE_ONE = Messages.OPERAND_SIZE_ONE;
+	private String FIRST_OPERAND_MUST_CONTENT = Messages.FIRST_OPERAND_MUST_CONTENT;
+	
+	override register(EValidatorRegistrar registrar) {
+		// not needed for classes used as ComposedCheck
+	}
+
+	@Check(NORMAL)
+	def checkActiveState(ActiveState op) {
+		if (op.operand.size < 1) {
+			error(String.format(OPERAND_SIZE_ONE, op.symbol), RBACorePackage.Literals.OPERATOR__OPERAND, 1)
+			return;
+		}
+		var operand = op.operand.get(0)
+		if (operand.type != ExpressionType.CONTENT && operand.type != ExpressionType.SOUND) {
+			error(String.format(FIRST_OPERAND_MUST_CONTENT, op.symbol), RBACorePackage.Literals.OPERATOR__OPERAND)
+			return;
+		}
+	}
+}