Remove some remnants of NFileSystem

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1854191 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/POIDocument.java

@@ -418,8 +418,8 @@ public abstract class POIDocument implements Closeable {
     @Override
     public void close() throws IOException {
         if (directory != null) {
-            if (directory.getNFileSystem() != null) {
-                directory.getNFileSystem().close();
+            if (directory.getFileSystem() != null) {
+                directory.getFileSystem().close();
                 clearDirectory();
             }
         }

src/java/org/apache/poi/poifs/filesystem/DirectoryNode.java

@@ -119,17 +119,6 @@ public class DirectoryNode
         return _nfilesystem;
     }
 
-
-    /**
-     * If this is NPOIFS based, return the NPOIFSFileSystem
-     *  that this belong to, otherwise Null if OPOIFS based
-     * @return the filesystem that this belongs to
-     */
-    public POIFSFileSystem getNFileSystem()
-    {
-        return _nfilesystem;
-    }
-
     /**
      * open a document in the directory's entry's list of entries
      *

src/java/org/apache/poi/poifs/filesystem/DocumentInputStream.java

@@ -87,7 +87,7 @@ public final class DocumentInputStream extends InputStream implements LittleEndi
         DocumentProperty property = (DocumentProperty)doc.getProperty();
         _document = new POIFSDocument(
                 property, 
-                ((DirectoryNode)doc.getParent()).getNFileSystem()
+                ((DirectoryNode)doc.getParent()).getFileSystem()
         );
         _data = _document.getBlockIterator();
     }

src/java/org/apache/poi/poifs/filesystem/POIFSDocument.java

@@ -54,7 +54,7 @@ public final class POIFSDocument implements POIFSViewable, Iterable<ByteBuffer>
     */
    public POIFSDocument(DocumentNode document) {
        this((DocumentProperty)document.getProperty(), 
-            ((DirectoryNode)document.getParent()).getNFileSystem());
+            ((DirectoryNode)document.getParent()).getFileSystem());
    }
    
    /**

src/testcases/org/apache/poi/poifs/filesystem/TestDocumentInputStream.java

@@ -442,7 +442,6 @@ public final class TestDocumentInputStream {
 
         try (POIFSFileSystem npoifs = new POIFSFileSystem(sample)) {
             // Ensure we have what we expect on the root
-            assertEquals(npoifs, npoifs.getRoot().getNFileSystem());
             assertEquals(npoifs, npoifs.getRoot().getFileSystem());
 
             // Check inside

src/testcases/org/apache/poi/poifs/filesystem/TestFileSystemBugs.java

@@ -140,9 +140,9 @@ public final class TestFileSystemBugs {
         // Copy over
         EntryUtils.copyNodes(root, dest);
 
-        // Re-load, always as NPOIFS
+        // Re-load
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
-        root.getNFileSystem().writeFilesystem(baos);
+        root.getFileSystem().writeFilesystem(baos);
 
         POIFSFileSystem read = new POIFSFileSystem(
                 new ByteArrayInputStream(baos.toByteArray()));