svn commit: r1889591 - /pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/multipdf/PDFMergerUtility.java

[tilman]

Author: tilman
Date: Fri May  7 04:47:41 2021
New Revision: 1889591

URL: http://svn.apache.org/viewvc?rev=1889591&view=rev
Log:
PDFBOX-4892: optimize, as suggested by valerybokov

Modified:
    
pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/multipdf/PDFMergerUtility.java

Modified: 
pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/multipdf/PDFMergerUtility.java
URL: 
http://svn.apache.org/viewvc/pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/multipdf/PDFMergerUtility.java?rev=1889591&r1=1889590&r2=1889591&view=diff
==============================================================================
--- 
pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/multipdf/PDFMergerUtility.java
 (original)
+++ 
pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/multipdf/PDFMergerUtility.java
 Fri May  7 04:47:41 2021
@@ -431,7 +431,7 @@ public class PDFMergerUtility
     private void legacyMergeDocuments(MemoryUsageSetting memUsageSetting,
             CompressParameters compressParameters) throws IOException
     {
-        if (sources != null && !sources.isEmpty())
+        if (!sources.isEmpty())
         {
             // Make sure that:
             // - first Exception is kept
@@ -924,9 +924,13 @@ public class PDFMergerUtility
 
     private void mergeLanguage(PDDocumentCatalog destCatalog, 
PDDocumentCatalog srcCatalog)
     {
-        if (destCatalog.getLanguage() == null && srcCatalog.getLanguage() != 
null)
+        if (destCatalog.getLanguage() == null)
         {
-            destCatalog.setLanguage(srcCatalog.getLanguage());
+            String srcLanguage = srcCatalog.getLanguage();
+            if (srcLanguage != null)
+            {
+                destCatalog.setLanguage(srcLanguage);
+            }
         }
     }
 
@@ -994,11 +998,11 @@ public class PDFMergerUtility
             PDStructureTreeRoot destStructTree) throws IOException
     {
         PDNameTreeNode<PDStructureElement> srcIDTree = 
srcStructTree.getIDTree();
-        PDNameTreeNode<PDStructureElement> destIDTree = 
destStructTree.getIDTree();
         if (srcIDTree == null)
         {
             return;
         }
+        PDNameTreeNode<PDStructureElement> destIDTree = 
destStructTree.getIDTree();
         if (destIDTree == null)
         {
             destIDTree = new PDStructureElementNameTreeNode();