1 files changed, 39 insertions, 0 deletions
diff --git a/rba.tool.editor/src/rba/tool/editor/validation/validators/HideLowerPriorityValidator.xtend b/rba.tool.editor/src/rba/tool/editor/validation/validators/HideLowerPriorityValidator.xtend
new file mode 100644
index 0000000..294558c
--- /dev/null
+++ b/rba.tool.editor/src/rba/tool/editor/validation/validators/HideLowerPriorityValidator.xtend
@@ -0,0 +1,39 @@
+package rba.tool.editor.validation.validators
+
+import org.eclipse.xtext.validation.Check
+import org.eclipse.xtext.validation.EValidatorRegistrar
+import rba.core.ExpressionType
+import rba.core.RBACorePackage
+import rba.tool.editor.messages.Messages
+import rba.tool.editor.validation.AbstractRBAModelValidator
+import rba.view.HideLowerPriority
+
+class HideLowerPriorityValidator extends AbstractRBAModelValidator {
+	private static final String OperatorName = HideLowerPriority.simpleName
+
+	override register(EValidatorRegistrar registrar) {
+		// not needed for classes used as ComposedCheck
+	}
+
+	@Check(NORMAL)
+	def checkHideLowerPriority(HideLowerPriority hideLowerPriority) {
+		if (hideLowerPriority.operand.size != 2) {
+			error(String.format(Messages.OPERAND_SIZE_TWO, OperatorName), RBACorePackage.Literals.OPERATOR__OPERAND, 0)
+			return;
+		}
+
+		var firstArgument = hideLowerPriority.operand.get(0)
+		if (firstArgument.type != ExpressionType::AREA) {
+			error(String.format(Messages.ARGUMENT_MUST_AREA, OperatorName),
+				RBACorePackage.Literals.OPERATOR__OPERAND, 0)
+			return;
+		}
+
+		var secondArgument = hideLowerPriority.operand.get(1)
+		if (secondArgument.type != ExpressionType::AREA) {
+			error(String.format(Messages.ARGUMENT_MUST_AREA, OperatorName),
+				RBACorePackage.Literals.OPERATOR__OPERAND, 1)
+			return;
+		}
+	}
+}