Add a NPOIFS aware createDocumentInputStream method to DirectoryNode, and use it in POIDocument. Also fix indent in the latter

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1053522 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -20,6 +20,7 @@ package org.apache.poi;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.Iterator;
 import java.util.List;
@@ -143,10 +144,10 @@ public abstract class POIDocument {
 	   //directory can be null when creating new documents
 	   if(directory == null) return null;
 
-        DocumentInputStream dis;
+	   InputStream dis;
 	   try {
 	      // Find the entry, and get an input stream for it
-			dis = directory.createDocumentInputStream(setName);
+	      dis = directory.createDocumentInputStream( directory.getEntry(setName) );
 	   } catch(IOException ie) {
 	      // Oh well, doesn't exist
 	      logger.log(POILogger.WARN, "Error getting property set with name " + setName + "\n" + ie);

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

@@ -19,9 +19,14 @@
 
 package org.apache.poi.poifs.filesystem;
 
-import java.io.*;
-
-import java.util.*;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
 
 import org.apache.poi.hpsf.ClassID;
 import org.apache.poi.poifs.dev.POIFSViewable;
@@ -162,7 +167,6 @@ public class DirectoryNode
      * @exception IOException if the document does not exist or the
      *            name is that of a DirectoryEntry
      */
-
     public DocumentInputStream createDocumentInputStream(
             final String documentName)
         throws IOException
@@ -177,6 +181,33 @@ public class DirectoryNode
         return new DocumentInputStream(( DocumentEntry ) document);
     }
 
+    /**
+     * open a document in the directory's entry's list of entries
+     *
+     * @param documentEntry the document to be opened
+     *
+     * @return a newly opened DocumentInputStream or NDocumentInputStream
+     *
+     * @exception IOException if the document does not exist or the
+     *            name is that of a DirectoryEntry
+     */
+    public InputStream createDocumentInputStream(
+            final Entry document)
+        throws IOException
+    {
+        if (!document.isDocumentEntry()) {
+            throw new IOException("Entry '" + document.getName()
+                                  + "' is not a DocumentEntry");
+        }
+        
+        DocumentEntry entry = (DocumentEntry)document;
+        if(_ofilesystem != null) {
+           return new DocumentInputStream(entry);
+        } else {
+           return new NDocumentInputStream(entry);
+        }
+    }
+
     /**
      * create a new DocumentEntry
      *