Simplification of BiffViewer. Made easier to send results to file.

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@657166 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/dev/BiffViewer.java

@@ -15,22 +15,20 @@
    limitations under the License.
 ==================================================================== */
 
-/*
- *  BiffViewer.java
- *
- *  Created on November 13, 2001, 9:23 AM
- */
 package org.apache.poi.hssf.dev;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.util.ArrayList;
+
 import org.apache.poi.hssf.record.*;
 import org.apache.poi.poifs.filesystem.POIFSFileSystem;
 import org.apache.poi.util.HexDump;
 
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.ArrayList;
-
 /**
  *  Utillity for reading in BIFF8 records and displaying data from them.
  *
@@ -38,38 +36,26 @@ import java.util.ArrayList;
  *@author     Glen Stampoultzis (glens at apache.org)
  *@see        #main
  */
-
+public final class BiffViewer {
-public class BiffViewer {
+    private final File _inputFile;
-    String filename;
     private boolean dump;
+    private final PrintStream _ps;
 
 
-    /**
+    public BiffViewer(File inFile, PrintStream ps) {
-     *  Creates new BiffViewer
+        _inputFile = inFile;
-     *
+        _ps = ps;
-     *@param  args
-     */
-
-    public BiffViewer(String[] args) {
-        if (args.length > 0) {
-            filename = args[0];
-        } else {
-            System.out.println("BIFFVIEWER REQUIRES A FILENAME***");
-        }
     }
 
 
     /**
      *  Method run starts up BiffViewer...
      */
-
     public void run() {
         try {
-            POIFSFileSystem fs =
+            POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(_inputFile));
-                    new POIFSFileSystem(new FileInputStream(filename));
+            InputStream stream = fs.createDocumentInputStream("Workbook");
-            InputStream stream =
+            createRecords(stream, dump, _ps);
-                    fs.createDocumentInputStream("Workbook");
-            createRecords(stream, dump);
         } catch (Exception e) {
             e.printStackTrace();
         }
@@ -86,451 +72,306 @@ public class BiffViewer {
      *      InputStream
      *@exception  RecordFormatException  on error processing the InputStream
      */
-
+    public static Record[] createRecords(InputStream in, boolean dump, PrintStream ps)
-    public static Record[] createRecords(InputStream in, boolean dump)
              throws RecordFormatException {
         ArrayList records = new ArrayList();
         RecordDetails activeRecord = null;
 
-        try {
+        BiffviewRecordInputStream recStream = new BiffviewRecordInputStream(in);
-          BiffviewRecordInputStream recStream = new BiffviewRecordInputStream(in);
+        while (recStream.hasNextRecord()) {
-          while (recStream.hasNextRecord()) {
             recStream.nextRecord();
             if (recStream.getSid() != 0) {
-              Record record = createRecord (recStream);
+                Record record = createRecord (recStream);
                     if (record.getSid() != ContinueRecord.sid)
                     {
                         records.add(record);
                         if (activeRecord != null)
-                            activeRecord.dump();
+                            activeRecord.dump(ps);
-                  activeRecord = new RecordDetails(recStream.getSid(), recStream.getLength(), (int)recStream.getPos(), record);
+                        activeRecord = new RecordDetails(recStream.getSid(), recStream.getLength(), (int)recStream.getPos(), record);
                     }
                     if (dump) {
-                recStream.dumpBytes();
+                        recStream.dumpBytes(ps);
-              }
                     }
-                }
+              }
-            activeRecord.dump();
+        }
-        } catch (IOException e) {
+        if (activeRecord != null) {
-            throw new RecordFormatException("Error reading bytes", e);
+            activeRecord.dump(ps);
         }
         Record[] retval = new Record[records.size()];
-
+        records.toArray(retval);
-        retval = (Record[]) records.toArray(retval);
         return retval;
     }
 
-    private static void dumpNormal(Record record, int startloc, short rectype, short recsize)
-    {
-        System.out.println("Offset 0x" + Integer.toHexString(startloc) + " (" + startloc + ")");
-        System.out.println( "recordid = 0x" + Integer.toHexString( rectype ) + ", size = " + recsize );
-        System.out.println( record.toString() );
-
-    }
 
     /**
-     *  Essentially a duplicate of RecordFactory. Kept seperate as not to screw
+     *  Essentially a duplicate of RecordFactory. Kept separate as not to screw
      *  up non-debug operations.
      *
      */
     private static Record createRecord( RecordInputStream in )
     {
-        Record retval = null;
-
         switch ( in.getSid() )
         {
-
             case ChartRecord.sid:
-                retval = new ChartRecord( in );
+                return new ChartRecord( in );
-                break;
             case ChartFormatRecord.sid:
-                retval = new ChartFormatRecord( in );
+                return new ChartFormatRecord( in );
-                break;
             case SeriesRecord.sid:
-                retval = new SeriesRecord( in );
+                return new SeriesRecord( in );
-                break;
             case BeginRecord.sid:
-                retval = new BeginRecord( in );
+                return new BeginRecord( in );
-                break;
             case EndRecord.sid:
-                retval = new EndRecord( in );
+                return new EndRecord( in );
-                break;
             case BOFRecord.sid:
-                retval = new BOFRecord( in );
+                return new BOFRecord( in );
-                break;
             case InterfaceHdrRecord.sid:
-                retval = new InterfaceHdrRecord( in );
+                return new InterfaceHdrRecord( in );
-                break;
             case MMSRecord.sid:
-                retval = new MMSRecord( in );
+                return new MMSRecord( in );
-                break;
             case InterfaceEndRecord.sid:
-                retval = new InterfaceEndRecord( in );
+                return new InterfaceEndRecord( in );
-                break;
             case WriteAccessRecord.sid:
-                retval = new WriteAccessRecord( in );
+                return new WriteAccessRecord( in );
-                break;
             case CodepageRecord.sid:
-                retval = new CodepageRecord( in );
+                return new CodepageRecord( in );
-                break;
             case DSFRecord.sid:
-                retval = new DSFRecord( in );
+                return new DSFRecord( in );
-                break;
             case TabIdRecord.sid:
-                retval = new TabIdRecord( in );
+                return new TabIdRecord( in );
-                break;
             case FnGroupCountRecord.sid:
-                retval = new FnGroupCountRecord( in );
+                return new FnGroupCountRecord( in );
-                break;
             case WindowProtectRecord.sid:
-                retval = new WindowProtectRecord( in );
+                return new WindowProtectRecord( in );
-                break;
             case ProtectRecord.sid:
-                retval = new ProtectRecord( in );
+                return new ProtectRecord( in );
-                break;
             case PasswordRecord.sid:
-                retval = new PasswordRecord( in );
+                return new PasswordRecord( in );
-                break;
             case ProtectionRev4Record.sid:
-                retval = new ProtectionRev4Record( in );
+                return new ProtectionRev4Record( in );
-                break;
             case PasswordRev4Record.sid:
-                retval = new PasswordRev4Record( in );
+                return new PasswordRev4Record( in );
-                break;
             case WindowOneRecord.sid:
-                retval = new WindowOneRecord( in );
+                return new WindowOneRecord( in );
-                break;
             case BackupRecord.sid:
-                retval = new BackupRecord( in );
+                return new BackupRecord( in );
-                break;
             case HideObjRecord.sid:
-                retval = new HideObjRecord( in );
+                return new HideObjRecord( in );
-                break;
             case DateWindow1904Record.sid:
-                retval = new DateWindow1904Record( in );
+                return new DateWindow1904Record( in );
-                break;
             case PrecisionRecord.sid:
-                retval = new PrecisionRecord( in );
+                return new PrecisionRecord( in );
-                break;
             case RefreshAllRecord.sid:
-                retval = new RefreshAllRecord( in );
+                return new RefreshAllRecord( in );
-                break;
             case BookBoolRecord.sid:
-                retval = new BookBoolRecord( in );
+                return new BookBoolRecord( in );
-                break;
             case FontRecord.sid:
-                retval = new FontRecord( in );
+                return new FontRecord( in );
-                break;
             case FormatRecord.sid:
-                retval = new FormatRecord( in );
+                return new FormatRecord( in );
-                break;
             case ExtendedFormatRecord.sid:
-                retval = new ExtendedFormatRecord( in );
+                return new ExtendedFormatRecord( in );
-                break;
             case StyleRecord.sid:
-                retval = new StyleRecord( in );
+                return new StyleRecord( in );
-                break;
             case UseSelFSRecord.sid:
-                retval = new UseSelFSRecord( in );
+                return new UseSelFSRecord( in );
-                break;
             case BoundSheetRecord.sid:
-                retval = new BoundSheetRecord( in );
+                return new BoundSheetRecord( in );
-                break;
             case CountryRecord.sid:
-                retval = new CountryRecord( in );
+                return new CountryRecord( in );
-                break;
             case SSTRecord.sid:
-                retval = new SSTRecord( in );
+                return new SSTRecord( in );
-                break;
             case ExtSSTRecord.sid:
-                retval = new ExtSSTRecord( in );
+                return new ExtSSTRecord( in );
-                break;
             case EOFRecord.sid:
-                retval = new EOFRecord( in );
+                return new EOFRecord( in );
-                break;
             case IndexRecord.sid:
-                retval = new IndexRecord( in );
+                return new IndexRecord( in );
-                break;
             case CalcModeRecord.sid:
-                retval = new CalcModeRecord( in );
+                return new CalcModeRecord( in );
-                break;
             case CalcCountRecord.sid:
-                retval = new CalcCountRecord( in );
+                return new CalcCountRecord( in );
-                break;
             case RefModeRecord.sid:
-                retval = new RefModeRecord( in );
+                return new RefModeRecord( in );
-                break;
             case IterationRecord.sid:
-                retval = new IterationRecord( in );
+                return new IterationRecord( in );
-                break;
             case DeltaRecord.sid:
-                retval = new DeltaRecord( in );
+                return new DeltaRecord( in );
-                break;
             case SaveRecalcRecord.sid:
-                retval = new SaveRecalcRecord( in );
+                return new SaveRecalcRecord( in );
-                break;
             case PrintHeadersRecord.sid:
-                retval = new PrintHeadersRecord( in );
+                return new PrintHeadersRecord( in );
-                break;
             case PrintGridlinesRecord.sid:
-                retval = new PrintGridlinesRecord( in );
+                return new PrintGridlinesRecord( in );
-                break;
             case GridsetRecord.sid:
-                retval = new GridsetRecord( in );
+                return new GridsetRecord( in );
-                break;
             case DrawingGroupRecord.sid:
-                retval = new DrawingGroupRecord( in );
+                return new DrawingGroupRecord( in );
-                break;
             case DrawingRecordForBiffViewer.sid:
-                retval = new DrawingRecordForBiffViewer( in );
+                return new DrawingRecordForBiffViewer( in );
-                break;
             case DrawingSelectionRecord.sid:
-                retval = new DrawingSelectionRecord( in );
+                return new DrawingSelectionRecord( in );
-                break;
             case GutsRecord.sid:
-                retval = new GutsRecord( in );
+                return new GutsRecord( in );
-                break;
             case DefaultRowHeightRecord.sid:
-                retval = new DefaultRowHeightRecord( in );
+                return new DefaultRowHeightRecord( in );
-                break;
             case WSBoolRecord.sid:
-                retval = new WSBoolRecord( in );
+                return new WSBoolRecord( in );
-                break;
             case HeaderRecord.sid:
-                retval = new HeaderRecord( in );
+                return new HeaderRecord( in );
-                break;
             case FooterRecord.sid:
-                retval = new FooterRecord( in );
+                return new FooterRecord( in );
-                break;
             case HCenterRecord.sid:
-                retval = new HCenterRecord( in );
+                return new HCenterRecord( in );
-                break;
             case VCenterRecord.sid:
-                retval = new VCenterRecord( in );
+                return new VCenterRecord( in );
-                break;
             case PrintSetupRecord.sid:
-                retval = new PrintSetupRecord( in );
+                return new PrintSetupRecord( in );
-                break;
             case DefaultColWidthRecord.sid:
-                retval = new DefaultColWidthRecord( in );
+                return new DefaultColWidthRecord( in );
-                break;
             case DimensionsRecord.sid:
-                retval = new DimensionsRecord( in );
+                return new DimensionsRecord( in );
-                break;
             case RowRecord.sid:
-                retval = new RowRecord( in );
+                return new RowRecord( in );
-                break;
             case LabelSSTRecord.sid:
-                retval = new LabelSSTRecord( in );
+                return new LabelSSTRecord( in );
-                break;
             case RKRecord.sid:
-                retval = new RKRecord( in );
+                return new RKRecord( in );
-                break;
             case NumberRecord.sid:
-                retval = new NumberRecord( in );
+                return new NumberRecord( in );
-                break;
             case DBCellRecord.sid:
-                retval = new DBCellRecord( in );
+                return new DBCellRecord( in );
-                break;
             case WindowTwoRecord.sid:
-                retval = new WindowTwoRecord( in );
+                return new WindowTwoRecord( in );
-                break;
             case SelectionRecord.sid:
-                retval = new SelectionRecord( in );
+                return new SelectionRecord( in );
-                break;
             case ContinueRecord.sid:
-                retval = new ContinueRecord( in );
+                return new ContinueRecord( in );
-                break;
             case LabelRecord.sid:
-                retval = new LabelRecord( in );
+                return new LabelRecord( in );
-                break;
             case MulRKRecord.sid:
-                retval = new MulRKRecord( in );
+                return new MulRKRecord( in );
-                break;
             case MulBlankRecord.sid:
-                retval = new MulBlankRecord( in );
+                return new MulBlankRecord( in );
-                break;
             case BlankRecord.sid:
-                retval = new BlankRecord( in );
+                return new BlankRecord( in );
-                break;
             case BoolErrRecord.sid:
-                retval = new BoolErrRecord( in );
+                return new BoolErrRecord( in );
-                break;
             case ColumnInfoRecord.sid:
-                retval = new ColumnInfoRecord( in );
+                return new ColumnInfoRecord( in );
-                break;
             case MergeCellsRecord.sid:
-                retval = new MergeCellsRecord( in );
+                return new MergeCellsRecord( in );
-                break;
             case AreaRecord.sid:
-                retval = new AreaRecord( in );
+                return new AreaRecord( in );
-                break;
             case DataFormatRecord.sid:
-                retval = new DataFormatRecord( in );
+                return new DataFormatRecord( in );
-                break;
             case BarRecord.sid:
-                retval = new BarRecord( in );
+                return new BarRecord( in );
-                break;
             case DatRecord.sid:
-                retval = new DatRecord( in );
+                return new DatRecord( in );
-                break;
             case PlotGrowthRecord.sid:
-                retval = new PlotGrowthRecord( in );
+                return new PlotGrowthRecord( in );
-                break;
             case UnitsRecord.sid:
-                retval = new UnitsRecord( in );
+                return new UnitsRecord( in );
-                break;
             case FrameRecord.sid:
-                retval = new FrameRecord( in );
+                return new FrameRecord( in );
-                break;
             case ValueRangeRecord.sid:
-                retval = new ValueRangeRecord( in );
+                return new ValueRangeRecord( in );
-                break;
             case SeriesListRecord.sid:
-                retval = new SeriesListRecord( in );
+                return new SeriesListRecord( in );
-                break;
             case FontBasisRecord.sid:
-                retval = new FontBasisRecord( in );
+                return new FontBasisRecord( in );
-                break;
             case FontIndexRecord.sid:
-                retval = new FontIndexRecord( in );
+                return new FontIndexRecord( in );
-                break;
             case LineFormatRecord.sid:
-                retval = new LineFormatRecord( in );
+                return new LineFormatRecord( in );
-                break;
             case AreaFormatRecord.sid:
-                retval = new AreaFormatRecord( in );
+                return new AreaFormatRecord( in );
-                break;
             case LinkedDataRecord.sid:
-                retval = new LinkedDataRecord( in );
+                return new LinkedDataRecord( in );
-                break;
             case FormulaRecord.sid:
-                retval = new FormulaRecord( in );
+                return new FormulaRecord( in );
-                break;
             case SheetPropertiesRecord.sid:
-                retval = new SheetPropertiesRecord( in );
+                return new SheetPropertiesRecord( in );
-                break;
             case DefaultDataLabelTextPropertiesRecord.sid:
-                retval = new DefaultDataLabelTextPropertiesRecord( in );
+                return new DefaultDataLabelTextPropertiesRecord( in );
-                break;
             case TextRecord.sid:
-                retval = new TextRecord( in );
+                return new TextRecord( in );
-                break;
             case AxisParentRecord.sid:
-                retval = new AxisParentRecord( in );
+                return new AxisParentRecord( in );
-                break;
             case AxisLineFormatRecord.sid:
-                retval = new AxisLineFormatRecord( in );
+                return new AxisLineFormatRecord( in );
-                break;
             case SupBookRecord.sid:
-                retval = new SupBookRecord( in );
+                return new SupBookRecord( in );
-                break;
             case ExternSheetRecord.sid:
-                retval = new ExternSheetRecord( in );
+                return new ExternSheetRecord( in );
-                break;
             case SCLRecord.sid:
-                retval = new SCLRecord( in );
+                return new SCLRecord( in );
-                break;
             case SeriesToChartGroupRecord.sid:
-                retval = new SeriesToChartGroupRecord( in );
+                return new SeriesToChartGroupRecord( in );
-                break;
             case AxisUsedRecord.sid:
-                retval = new AxisUsedRecord( in );
+                return new AxisUsedRecord( in );
-                break;
             case AxisRecord.sid:
-                retval = new AxisRecord( in );
+                return new AxisRecord( in );
-                break;
             case CategorySeriesAxisRecord.sid:
-                retval = new CategorySeriesAxisRecord( in );
+                return new CategorySeriesAxisRecord( in );
-                break;
             case AxisOptionsRecord.sid:
-                retval = new AxisOptionsRecord( in );
+                return new AxisOptionsRecord( in );
-                break;
             case TickRecord.sid:
-                retval = new TickRecord( in );
+                return new TickRecord( in );
-                break;
             case SeriesTextRecord.sid:
-                retval = new SeriesTextRecord( in );
+                return new SeriesTextRecord( in );
-                break;
             case ObjectLinkRecord.sid:
-                retval = new ObjectLinkRecord( in );
+                return new ObjectLinkRecord( in );
-                break;
             case PlotAreaRecord.sid:
-                retval = new PlotAreaRecord( in );
+                return new PlotAreaRecord( in );
-                break;
             case SeriesIndexRecord.sid:
-                retval = new SeriesIndexRecord( in );
+                return new SeriesIndexRecord( in );
-                break;
             case LegendRecord.sid:
-                retval = new LegendRecord( in );
+                return new LegendRecord( in );
-                break;
             case LeftMarginRecord.sid:
-                retval = new LeftMarginRecord( in );
+                return new LeftMarginRecord( in );
-                break;
             case RightMarginRecord.sid:
-                retval = new RightMarginRecord( in );
+                return new RightMarginRecord( in );
-                break;
             case TopMarginRecord.sid:
-                retval = new TopMarginRecord( in );
+                return new TopMarginRecord( in );
-                break;
             case BottomMarginRecord.sid:
-                retval = new BottomMarginRecord( in );
+                return new BottomMarginRecord( in );
-                break;
             case PaletteRecord.sid:
-                retval = new PaletteRecord( in );
+                return new PaletteRecord( in );
-                break;
             case StringRecord.sid:
-                retval = new StringRecord( in );
+                return new StringRecord( in );
-                break;
             case NameRecord.sid:
-                retval = new NameRecord( in );
+                return new NameRecord( in );
-                break;
             case PaneRecord.sid:
-                retval = new PaneRecord( in );
+                return new PaneRecord( in );
-                break;
             case SharedFormulaRecord.sid:
-            	 retval = new SharedFormulaRecord( in);
+            	 return new SharedFormulaRecord( in);
-            	 break;
             case ObjRecord.sid:
-            	 retval = new ObjRecord( in);
+            	 return new ObjRecord( in);
-            	 break;
             case TextObjectRecord.sid:
-            	 retval = new TextObjectRecord( in);
+            	 return new TextObjectRecord( in);
-            	 break;
             case HorizontalPageBreakRecord.sid:
-                retval = new HorizontalPageBreakRecord( in);
+                return new HorizontalPageBreakRecord( in);
-                break;
             case VerticalPageBreakRecord.sid:
-                retval = new VerticalPageBreakRecord( in);
+                return new VerticalPageBreakRecord( in);
-                break;
             case WriteProtectRecord.sid:
-            	retval = new WriteProtectRecord( in);
+            	return new WriteProtectRecord( in);
-            	break;
             case FilePassRecord.sid:
-            	retval = new FilePassRecord(in);
+            	return new FilePassRecord(in);
-            	break;
             case NoteRecord.sid:
-                retval = new NoteRecord( in );
+                return new NoteRecord( in );
-                break;
             case FileSharingRecord.sid:
-                retval = new FileSharingRecord( in );
+                return new FileSharingRecord( in );
-                break;
             case HyperlinkRecord.sid:
-                retval = new HyperlinkRecord( in );
+                return new HyperlinkRecord( in );
-                break;
-            default:
-                retval = new UnknownRecord( in );
         }
-        return retval;
+        return new UnknownRecord( in );
     }
 
 
     /**
      *  Method setDump - hex dump out data or not.
-     *
-     *@param  dump
      */
-
     public void setDump(boolean dump) {
         this.dump = dump;
     }
@@ -552,33 +393,44 @@ public class BiffViewer {
      *
      */
     public static void main(String[] args) {
+
+        System.setProperty("poi.deserialize.escher", "true");
+
+        if (args.length == 0) {
+            System.out.println( "Biff viewer needs a filename" );
+            return;
+        }
+
         try {
-        	System.setProperty("poi.deserialize.escher", "true");
+            String inFileName = args[0];
-
+            File inputFile = new File(inFileName);
-            if (args.length == 0)
+            if(!inputFile.exists()) {
-            {
+                throw new RuntimeException("specified inputFile '" + inFileName + "' does not exist");
-                System.out.println( "Biff viewer needs a filename" );
             }
-            else
+            PrintStream ps;
-            {
+            if (false) { // set to true to output to file
-                BiffViewer viewer = new BiffViewer(args);
+            	OutputStream os = new FileOutputStream(inFileName + ".out");
-                if ((args.length > 1) && args[1].equals("on")) {
+            	ps = new PrintStream(os);
-                    viewer.setDump(true);
+            } else {
-                }
+            	ps = System.out;
-                if ((args.length > 1) && args[1].equals("bfd")) {
-                    POIFSFileSystem fs =
-                            new POIFSFileSystem(new FileInputStream(args[0]));
-                    InputStream stream =
-                            fs.createDocumentInputStream("Workbook");
-                    int size = stream.available();
-                    byte[] data = new byte[size];
-
-                    stream.read(data);
-                    HexDump.dump(data, 0, System.out, 0);
-                } else {
-                    viewer.run();
-                }
             }
+            BiffViewer viewer = new BiffViewer(inputFile, ps);
+
+            if (args.length > 1 && args[1].equals("on")) {
+                viewer.setDump(true);
+            }
+            if (args.length > 1 && args[1].equals("bfd")) {
+                POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(inputFile));
+                InputStream stream = fs.createDocumentInputStream("Workbook");
+                int size = stream.available();
+                byte[] data = new byte[size];
+
+                stream.read(data);
+                HexDump.dump(data, 0, System.out, 0);
+            } else {
+                viewer.run();
+            }
+            ps.close();
         } catch (Exception e) {
             e.printStackTrace();
         }
@@ -587,7 +439,7 @@ public class BiffViewer {
     /**
      * This record supports dumping of completed continue records.
      */
-    static class RecordDetails
+    private static final class RecordDetails
     {
         short rectype, recsize;
         int startloc;
@@ -616,18 +468,19 @@ public class BiffViewer {
             return record;
         }
 
-        public void dump() throws IOException
+        public void dump(PrintStream ps) {
-        {
+            ps.println("Offset 0x" + Integer.toHexString(startloc) + " (" + startloc + ")");
-                dumpNormal(record, startloc, rectype, recsize);
+            ps.println( "recordid = 0x" + Integer.toHexString( rectype ) + ", size = " + recsize );
+            ps.println( record.toString() );
         }
     }
 
-    static class BiffviewRecordInputStream extends RecordInputStream {
+    private static final class BiffviewRecordInputStream extends RecordInputStream {
       public BiffviewRecordInputStream(InputStream in) {
         super(in);
       }
-      public void dumpBytes() {
+      public void dumpBytes(PrintStream ps) {
-        HexDump.dump(this.data, 0, this.currentLength);
+        ps.println(HexDump.dump(this.data, 0, this.currentLength));
       }
     }