1 files changed, 40 insertions, 0 deletions
diff --git a/rba.tool.editor/src/rba/tool/editor/validation/validators/LowerThanOperatorValidator.xtend b/rba.tool.editor/src/rba/tool/editor/validation/validators/LowerThanOperatorValidator.xtend
new file mode 100644
index 0000000..1fde1f0
--- /dev/null
+++ b/rba.tool.editor/src/rba/tool/editor/validation/validators/LowerThanOperatorValidator.xtend
@@ -0,0 +1,40 @@
+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.LowerThanOperator
+import rba.core.RBACorePackage
+import rba.tool.editor.messages.Messages
+import rba.tool.editor.validation.AbstractRBAModelValidator
+
+class LowerThanOperatorValidator extends AbstractRBAModelValidator {
+
+	private String LOWERTHAN_OPERAND_SIZE_NULL = Messages.LOWERTHAN_OPERAND_SIZE_NULL;
+
+	private String LOWERTHAN_OPERAND_SIZE = Messages.LOWERTHAN_OPERAND_SIZE;
+
+	private String LOWERTHAN_OPERAND_TYPE = Messages.LOWERTHAN_OPERAND_TYPE;
+
+	override register(EValidatorRegistrar registrar) {
+		// not needed for classes used as ComposedCheck
+	}
+
+	@Check(NORMAL)
+	def checkLowerThanOperator(LowerThanOperator lowerThanOperator) {
+		if (lowerThanOperator.operand.size == 0) {
+			error(LOWERTHAN_OPERAND_SIZE_NULL, RBACorePackage.Literals.OPERATOR__OPERAND)
+			return;
+		}
+		if (lowerThanOperator.operand.size != 1) {
+			error(LOWERTHAN_OPERAND_SIZE, RBACorePackage.Literals.OPERATOR__OPERAND)
+			return;
+		}
+		for (operand : lowerThanOperator.operand) {
+			if (operand.type != ExpressionType.VALUE) {
+				error(LOWERTHAN_OPERAND_TYPE, RBACorePackage.Literals.OPERATOR__OPERAND)
+				return;
+			}
+		}
+	}
+}