Java: Add support to Compact Source Files

java/downgrades/9f6026c400996c13842974b24f076a486ad1f69c/upgrade.properties

@@ -0,0 +1,3 @@
+description: Remove Java 25 compact source files support by removing `isImplicitClass` table
+compatibility: partial
+isImplicitClass.rel: delete

java/ql/lib/change-notes/2025-07-23-compact-source-files.md

@@ -0,0 +1,4 @@
+---
+category: feature
+---
+* Added support for Java 25 compact source files (JEP 512). The new predicate `Class.isImplicit()` identifies classes that are implicitly declared when using compact source files, and the new predicate `CompilationUnit.isCompactSourceFile()` identifies compilation units that contain compact source files.

java/ql/lib/config/semmlecode.dbscheme

@@ -537,6 +537,10 @@ isLocalClassOrInterface(
   int parent: @localtypedeclstmt ref
 );
 
+isImplicitClass(
+  unique int classid: @classorinterface ref
+);
+
 isDefConstr(
   int constructorid: @constructor ref
 );