Fix JAVA_HOME on Fedora 42

ldapjdk.spec

@@ -2,7 +2,8 @@
 Name:             ldapjdk
 ################################################################################
 
-%global           product_id dogtag-ldapjdk
+%global           vendor_id dogtag
+%global           product_id %{vendor_id}-ldapjdk
 
 # Upstream version number:
 %global           major_version 5
@@ -53,25 +54,19 @@ ExclusiveArch:    %{java_arches} noarch
 # Java
 ################################################################################
 
-%if 0%{?rhel} && 0%{?rhel} <= 9
+%if 0%{?fedora} && 0%{?fedora} <= 39 || 0%{?rhel} && 0%{?rhel} <= 9
 
+# use Java 17 on Fedora 39 or older and RHEL 9 or older
 %define java_devel java-17-openjdk-devel
 %define java_headless java-17-openjdk-headless
 %define java_home %{_jvmdir}/jre-17-openjdk
 
 %else
 
-# Use Java 21 on Fedora 40+ and RHEL 10, otherwise use Java 17.
-%global java_devel java-devel >= 1:17
-%global java_headless java-headless >= 1:17
-
-# Don't use find since it might not work well with local builds.
-#   find {_jvmdir} -maxdepth 1 | grep "jre-[0-9]\+$"
-%global java_home %(
-   source /usr/share/java-utils/java-functions;
-   _prefer_jre=true;
-   set_jvm;
-   echo $JAVA_HOME)
+# otherwise, use Java 21
+%define java_devel java-21-openjdk-devel
+%define java_headless java-21-openjdk-headless
+%define java_home %{_jvmdir}/jre-21-openjdk
 
 %endif