From 0e523d405e1b1ce3260c9fd637da56e8a7add868 Mon Sep 17 00:00:00 2001
From: Tobias Brohl aka The_Minefighter <tobrohl@gmail.com>
Date: Mon, 14 Oct 2024 11:13:19 +0200
Subject: [PATCH] Fix issue #1819 incorrect enum value name generation with
 leading digits

The first character of an enum value name is checked whether it complies with isJavaIdentifierStart, if not an underscore prefix will be added to that name.
---
 .../com/sun/tools/xjc/reader/xmlschema/SimpleTypeBuilder.java   | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/jaxb-ri/xjc/src/main/java/com/sun/tools/xjc/reader/xmlschema/SimpleTypeBuilder.java b/jaxb-ri/xjc/src/main/java/com/sun/tools/xjc/reader/xmlschema/SimpleTypeBuilder.java
index 47eb72161..54a159c1e 100644
--- a/jaxb-ri/xjc/src/main/java/com/sun/tools/xjc/reader/xmlschema/SimpleTypeBuilder.java
+++ b/jaxb-ri/xjc/src/main/java/com/sun/tools/xjc/reader/xmlschema/SimpleTypeBuilder.java
@@ -674,6 +674,8 @@ private List<CEnumConstant> buildCEnumConstants(XSRestrictionSimpleType type, bo
 
                 if(name==null) {
                     StringBuilder sb = new StringBuilder();
+                    if (facetValue.length()>0 && !Character.isJavaIdentifierStart(facetValue.charAt(0)))
+                        sb.append('_');
                     for( int i=0; i<facetValue.length(); i++) {
                         char ch = facetValue.charAt(i);
                         if(Character.isJavaIdentifierPart(ch))