PDFBOX-5660: refactor, avoid leaking this in constructor

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1934052 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

debugger/src/main/java/org/apache/pdfbox/debugger/PDFDebugger.java

@@ -1137,6 +1137,7 @@ else if (COSName.IMAGE.equals((stream).getCOSName(COSName.SUBTYPE)))
             }
         }
         StreamPane streamPane = new StreamPane(stream, isContentStream, isThumb, resourcesDic);
+        streamPane.init();
         replaceRightComponent(streamPane.getPanel());
     }
 

debugger/src/main/java/org/apache/pdfbox/debugger/streampane/StreamPane.java

@@ -143,6 +143,16 @@ public StreamPane(COSStream cosStream, boolean isContentStream, boolean isThumb,
             niceView = null;
         }
 
+        tabbedPane = new JTabbedPane();
+    }
+
+    /**
+     * Initialization, to be called immediately after construction.
+     *
+     * @throws IOException if there is an I/O error during internal data transfer.
+     */
+    public void init() throws IOException
+    {
         if (stream.isImage())
         {
             panel.add(createHeaderPanel(stream.getFilterList(), Stream.IMAGE, this));
@@ -154,7 +164,6 @@ public StreamPane(COSStream cosStream, boolean isContentStream, boolean isThumb,
             requestStreamText(Stream.DECODED);
         }
 
-        tabbedPane = new JTabbedPane();
         if (stream.isImage())
         {
             tabbedPane.add("Image view", rawView.getStreamPanel());