From 3778faa4104888b56a80722647cd4ae07283f853 Mon Sep 17 00:00:00 2001
From: Yeser Amer <yeser.amer@ibm.com>
Date: Mon, 15 Jul 2024 15:19:08 +0200
Subject: [PATCH] Fix DMN Validation when build fails

---
 .../validation/DMNDomainValidatorImpl.java     | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/kie-wb-common-dmn/kie-wb-common-dmn-backend/src/main/java/org/kie/workbench/common/dmn/backend/validation/DMNDomainValidatorImpl.java b/kie-wb-common-dmn/kie-wb-common-dmn-backend/src/main/java/org/kie/workbench/common/dmn/backend/validation/DMNDomainValidatorImpl.java
index 4cabebd9a2b..085c0f7fbaf 100644
--- a/kie-wb-common-dmn/kie-wb-common-dmn-backend/src/main/java/org/kie/workbench/common/dmn/backend/validation/DMNDomainValidatorImpl.java
+++ b/kie-wb-common-dmn/kie-wb-common-dmn-backend/src/main/java/org/kie/workbench/common/dmn/backend/validation/DMNDomainValidatorImpl.java
@@ -125,9 +125,7 @@ public Collection<DomainViolation> validate(final Diagram diagram,
 
             final Reader[] aDMNXMLReaders = new Reader[]{};
 
-            final ClassLoader classLoader = getClassLoader(diagram);
-
-            final DMNValidator dmnValidator = getDmnValidator(classLoader);
+            final DMNValidator dmnValidator = getDmnValidator(diagram);
 
             final List<DMNMessage> messages = dmnValidator
                     .validateUsing(DMNValidator.Validation.VALIDATE_MODEL,
@@ -148,8 +146,12 @@ public Collection<DomainViolation> validate(final Diagram diagram,
         }
     }
 
-    DMNValidator getDmnValidator(final ClassLoader classLoader) {
-        return DMNValidatorFactory.newValidator(classLoader, Collections.emptyList());
+    DMNValidator getDmnValidator(Diagram diagram) {
+        final ClassLoader classLoader = getClassLoader(diagram);
+
+        return classLoader != null ?
+                DMNValidatorFactory.newValidator(classLoader, Collections.emptyList()) :
+                DMNValidatorFactory.newValidator();
     }
 
     ClassLoader getClassLoader(final Diagram diagram) {
@@ -157,8 +159,10 @@ ClassLoader getClassLoader(final Diagram diagram) {
         final WorkspaceProject project = workspaceProjectService.resolveProject(path);
         final Module module = project.getMainModule();
         final BuildHelper.BuildResult result = buildHelper.build(module);
-        final ClassLoader classLoader = ((InternalKieModule) result.getBuilder().getKieModuleIgnoringErrors()).getModuleClassLoader();
-        return classLoader;
+        if (result.getBuilder() != null) {
+            return ((InternalKieModule) result.getBuilder().getKieModuleIgnoringErrors()).getModuleClassLoader();
+        }
+        return null;
     }
 
     DMNValidator.ValidatorBuilder.ValidatorImportReaderResolver getValidatorImportReaderResolver(final Metadata metadata) {