chore: fj-doc-mod-openpdf-ext, stronger library version retrieve

Author: fugerit79

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - fj-doc-mod-fop, recover Apache FOP version <https://github.com/fugerit-org/fj-doc/issues/571>
+- fj-doc-mod-openpdf-ext, stronger library version retrieve
 
 ## [8.17.4] - 2025-11-04
 

fj-doc-mod-openpdf-ext/src/main/java/org/fugerit/java/doc/mod/openpdf/ext/helpers/DocumentMetaHelper.java

@@ -3,6 +3,7 @@
 import com.lowagie.text.Document;
 import org.fugerit.java.core.function.SafeFunction;
 import org.fugerit.java.core.function.UnsafeConsumer;
+import org.fugerit.java.core.lang.helpers.StringUtils;
 import org.fugerit.java.core.util.mvn.MavenProps;
 import org.fugerit.java.doc.base.config.DocConfig;
 import org.fugerit.java.doc.base.config.VenusVersion;
@@ -20,7 +21,8 @@ private static String getModuleVersion() {
     }
 
     private static String getOpenPDFVersion() {
-        return MavenProps.getProperty( "com.github.librepdf", "openpdf", MavenProps.VERSION );
+        return StringUtils.valueWithDefault( Document.getVersion(),
+                StringUtils.valueWithDefault( MavenProps.getProperty( "com.github.librepdf", "openpdf", MavenProps.VERSION ), "" ) );
     }
 
     private static final String PRODUCER_OVER = "OpenPDF";