From 553aaa9b2ed2ff382d4fa64e85962a588c8ce7f2 Mon Sep 17 00:00:00 2001
From: Konrad Windszus <konrad_w@gmx.de>
Date: Fri, 9 Dec 2022 12:27:26 +0100
Subject: [PATCH] Accept versions without major version passed to m-enforcer-p

This closes #1120
---
 .../m2e/jdt/internal/AbstractJavaProjectConfigurator.java     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/org.eclipse.m2e.jdt/src/org/eclipse/m2e/jdt/internal/AbstractJavaProjectConfigurator.java b/org.eclipse.m2e.jdt/src/org/eclipse/m2e/jdt/internal/AbstractJavaProjectConfigurator.java
index 09a7654f00..168ee65183 100644
--- a/org.eclipse.m2e.jdt/src/org/eclipse/m2e/jdt/internal/AbstractJavaProjectConfigurator.java
+++ b/org.eclipse.m2e.jdt/src/org/eclipse/m2e/jdt/internal/AbstractJavaProjectConfigurator.java
@@ -907,6 +907,10 @@ private static List<Restriction> getVersionRangeRestrictionsIgnoringMicroAndQual
   }
 
   private static ArtifactVersion getMajorMinorOnlyVersion(ArtifactVersion lower) {
+    if(lower.getMajorVersion() == 0) {
+      // not every version constraint has a major version, in case it doesn't just rely on compareTo semantics as is
+      return lower;
+    }
     return new DefaultArtifactVersion(lower.getMajorVersion() + "." + lower.getMinorVersion());
   }