/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache POI" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache POI", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.poi.hssf.model;

import java.io.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Iterator;

import org.apache.poi.hssf.record.*;
import org.apache.poi.util.POILogger;
import org.apache.poi.hssf.HSSFLog;

/**
 * Workbook
 * Low level model implementation of a Workbook.  Provides creational methods
 * for settings and objects contained in the workbook object.
 * <P>
 * This file contains the low level binary records starting at the workbook's BOF and
 * ending with the workbook's EOF.  Use HSSFWorkbook for a high level representation.
 * <P>
 * The structures of the highlevel API use references to this to perform most of their
 * operations.  Its probably unwise to use these low level structures directly unless you
 * really know what you're doing.  I recommend you read the Microsoft Excel 97 Developer's
 * Kit (Microsoft Press) and the documentation at http://sc.openoffice.org/excelfileformat.pdf
 * before even attempting to use this.
 *
 * @author  Andrew C. Oliver (acoliver at apache dot org)
 * @author  Glen Stampoultzis (gstamp at iprimus dot com dot au)
 * @see org.apache.poi.hssf.usermodel.HSSFWorkbook
 * @version 1.0-pre
 */

public class Workbook
{
    private static final int   DEBUG       = POILogger.DEBUG;

    /**
     * constant used to set the "codepage" wherever "codepage" is set in records
     * (which is duplciated in more than one record)
     */

    private final static short CODEPAGE    = ( short ) 0x4b0;

    /**
     * this contains the Worksheet record objects
     */

    protected ArrayList        records     = null;

    /**
     * this contains a reference to the SSTRecord so that new stings can be added
     * to it.
     */

    protected SSTRecord        sst         = null;

    /**
     * holds the "boundsheet" records (aka bundlesheet) so that they can have their
     * reference to their "BOF" marker
     */

    protected ArrayList        boundsheets = new ArrayList();
    protected int              bspos       =
        0;   // holds the position of the last bound sheet.
    protected int              tabpos      =
        0;   // holds the position of the tabid record
    protected int              fontpos     =
        0;   // hold the position of the last font record
    protected int              numfonts    =
        0;   // hold the number of font records
    protected int              xfpos       =
        0;   // hold the position of the last extended font record
    protected int              numxfs      =
        0;   // hold the number of extended format records
    private int                backuppos   =
        0;   // holds the position of the backup record.
    private static POILogger   log         =
        HSSFLog.getPOILogger(Workbook.class);

    /**
     * Creates new Workbook with no intitialization --useless right now
     * @see #createWorkbook(Record[])
     */

    public Workbook()
    {
    }

    /**
     * read support  for low level
     * API.  Pass in an array of Record objects, A Workbook
     * object is constructed and passed back with all of its initialization set
     * to the passed in records and references to those records held. Unlike Sheet
     * workbook does not use an offset (its assumed to be 0) since its first in a file.
     * If you need an offset then construct a new array with a 0 offset or write your
     * own ;-p.
     *
     * @param recs an array of Record objects
     * @return Workbook object
     */

    public static Workbook createWorkbook(List recs)
    {
        log.log(DEBUG, "Workbook (readfile) created with reclen=",
                new Integer(recs.size()));
        Workbook  retval  = new Workbook();
        ArrayList records = new ArrayList(recs.size() / 3);

        for (int k = 0; k < recs.size(); k++)
        {
            Record rec = ( Record ) recs.get(k);

            if (rec.getSid() == EOFRecord.sid)
            {
                records.add(rec);
                log.log(DEBUG, "found workbook eof record at " + k);
                break;
            }
            switch (rec.getSid())
            {

                case BoundSheetRecord.sid :
                    log.log(DEBUG, "found boundsheet record at " + k);
                    retval.boundsheets.add(rec);
                    retval.bspos = k;
                    break;

                case SSTRecord.sid :
                    log.log(DEBUG, "found sst record at " + k);
                    retval.sst = ( SSTRecord ) rec;
                    break;

                case FontRecord.sid :
                    log.log(DEBUG, "found font record at " + k);
                    retval.fontpos = k;
                    retval.numfonts++;
                    break;

                case ExtendedFormatRecord.sid :
                    log.log(DEBUG, "found XF record at " + k);
                    retval.xfpos = k;
                    retval.numxfs++;
                    break;

                case TabIdRecord.sid :
                    log.log(DEBUG, "found tabid record at " + k);
                    retval.tabpos = k;
                    break;

                case BackupRecord.sid :
                    log.log(DEBUG, "found backup record at " + k);
                    retval.backuppos = k;
                    break;

                default :
            }
            records.add(rec);
        }
        retval.records = records;
        log.log(DEBUG, "exit create workbook from existing file function");
        return retval;
    }

    /**
     * Creates an empty workbook object with three blank sheets and all the empty
     * fields.  Use this to create a workbook from scratch.
     */

    public static Workbook createWorkbook()
    {
        log.log(DEBUG, "creating new workbook from scratch");
        Workbook  retval  = new Workbook();
        ArrayList records = new ArrayList(30);

        records.add(retval.createBOF());
        records.add(retval.createInterfaceHdr());
        records.add(retval.createMMS());
        records.add(retval.createInterfaceEnd());
        records.add(retval.createWriteAccess());
        records.add(retval.createCodepage());
        records.add(retval.createDSF());
        records.add(retval.createTabId());
        retval.tabpos = records.size() - 1;
        records.add(retval.createFnGroupCount());
        records.add(retval.createWindowProtect());
        records.add(retval.createProtect());
        records.add(retval.createPassword());
        records.add(retval.createProtectionRev4());
        records.add(retval.createPasswordRev4());
        records.add(retval.createWindowOne());
        records.add(retval.createBackup());
        retval.backuppos = records.size() - 1;
        records.add(retval.createHideObj());
        records.add(retval.createDateWindow1904());
        records.add(retval.createPrecision());
        records.add(retval.createRefreshAll());
        records.add(retval.createBookBool());
        records.add(retval.createFont());
        records.add(retval.createFont());
        records.add(retval.createFont());
        records.add(retval.createFont());
        retval.fontpos  = records.size() - 1;   // last font record postion
        retval.numfonts = 4;
        records.add(retval.createFormat(0));
        records.add(retval.createFormat(1));
        records.add(retval.createFormat(2));
        records.add(retval.createFormat(3));
        records.add(retval.createFormat(4));
        records.add(retval.createFormat(5));
        records.add(retval.createFormat(6));
        records.add(retval.createFormat(7));
        for (int k = 0; k < 21; k++)
        {
            records.add(retval.createExtendedFormat(k));
            retval.numxfs++;
        }
        retval.xfpos = records.size() - 1;
        for (int k = 0; k < 6; k++)
        {
            records.add(retval.createStyle(k));
        }
        records.add(retval.createUseSelFS());
        for (int k = 0; k < 1; k++)
        {   // now just do 1
            BoundSheetRecord bsr =
                ( BoundSheetRecord ) retval.createBoundSheet(k);

            records.add(bsr);
            retval.boundsheets.add(bsr);
            retval.bspos = records.size() - 1;
        }
        records.add(retval.createCountry());
        retval.sst = ( SSTRecord ) retval.createSST();
        records.add(retval.sst);
        records.add(retval.createExtendedSST());

        // TODO
        records.add(retval.createEOF());
        retval.records = records;
        log.log(DEBUG, "exit create new workbook from scratch");
        return retval;
    }

    public int getNumRecords()
    {
        return records.size();
    }

    /**
     * gets the font record at the given index in the font table.  Remember
     * "There is No Four" (someone at M$ must have gone to Rocky Horror one too
     * many times)
     *
     * @param idx the index to look at (0 or greater but NOT 4)
     * @return FontRecord located at the given index
     */

    public FontRecord getFontRecordAt(int idx)
    {
        int index = idx;

        if (index > 4)
        {
            index -= 1;   // adjust for "There is no 4"
        }
        if (index > (numfonts - 1))
        {
            throw new ArrayIndexOutOfBoundsException(
                "There are only " + numfonts
                + " font records, you asked for " + idx);
        }
        FontRecord retval =
            ( FontRecord ) records.get((fontpos - (numfonts - 1)) + index);

        return retval;
    }

    /**
     * creates a new font record and adds it to the "font table".  This causes the
     * boundsheets to move down one, extended formats to move down (so this function moves
     * those pointers as well)
     *
     * @return FontRecord that was just created
     */

    public FontRecord createNewFont()
    {
        FontRecord rec = ( FontRecord ) createFont();

        ++fontpos;
        ++bspos;
        ++xfpos;
        records.add(fontpos, rec);
        numfonts++;
        return rec;
    }

    /**
     * gets the number of font records
     *
     * @param number of font records in the "font table"
     */

    public int getNumberOfFontRecords()
    {
        return numfonts;
    }

    /**
     * Sets the BOF for a given sheet
     *
     * @param sheetnum the number of the sheet to set the positing of the bof for
     * @param pos the actual bof position
     */

    public void setSheetBof(int sheetnum, int pos)
    {
        log.log(DEBUG, "setting bof for sheetnum =", new Integer(sheetnum),
                " at pos=", new Integer(pos));
        checkSheets(sheetnum);
        (( BoundSheetRecord ) boundsheets.get(sheetnum))
            .setPositionOfBof(pos);
    }

    /**
     * Returns the position of the backup record.
     */

    public BackupRecord getBackupRecord()
    {
        return ( BackupRecord ) records.get(backuppos);
    }

    /**
     * sets the name for a given sheet.  If the boundsheet record doesn't exist and
     * its only one more than we have, go ahead and create it.  If its > 1 more than
     * we have, except
     *
     * @param sheetnum the sheet number (0 based)
     * @param sheetname the name for the sheet
     */

    public void setSheetName(int sheetnum, String sheetname)
    {
        checkSheets(sheetnum);
        (( BoundSheetRecord ) boundsheets.get(sheetnum))
            .setSheetname(sheetname);
        (( BoundSheetRecord ) boundsheets.get(sheetnum))
            .setSheetnameLength(( byte ) sheetname.length());
    }

    /**
     * gets the name for a given sheet.
     *
     * @param sheetnum the sheet number (0 based)
     * @return sheetname the name for the sheet
     */

    public String getSheetName(int sheetnum)
    {
        return (( BoundSheetRecord ) boundsheets.get(sheetnum))
            .getSheetname();
    }

    /**
     * if we're trying to address one more sheet than we have, go ahead and add it!  if we're
     * trying to address >1 more than we have throw an exception!
     */

    private void checkSheets(int sheetnum)
    {
        if ((boundsheets.size()) <= sheetnum)
        {   // if we're short one add another..
            if ((boundsheets.size() + 1) <= sheetnum)
            {
                throw new RuntimeException("Sheet number out of bounds!");
            }
            BoundSheetRecord bsr =
                ( BoundSheetRecord ) createBoundSheet(sheetnum);

            records.add(++bspos, bsr);
            boundsheets.add(bsr);
            fixTabIdRecord();
        }
    }

    public void removeSheet(int sheetnum)
    {
        if (boundsheets.size() > sheetnum)
        {
            records.remove(bspos - (boundsheets.size() - 1) + sheetnum);
            bspos--;
            boundsheets.remove(sheetnum);
            fixTabIdRecord();
        }
    }

    /**
     * make the tabid record look like the current situation.
     *
     */

    private void fixTabIdRecord()
    {
        TabIdRecord tir = ( TabIdRecord ) records.get(tabpos);
        short[]     tia = new short[ boundsheets.size() ];

        for (short k = 0; k < tia.length; k++)
        {
            tia[ k ] = k;
        }
        tir.setTabIdArray(tia);
    }

    /**
     * returns the number of boundsheet objects contained in this workbook.
     *
     * @return number of BoundSheet records
     */

    public int getNumSheets()
    {
        log.log(DEBUG, "getNumSheets=", new Integer(boundsheets.size()));
        return boundsheets.size();
    }

    /**
     * get the number of ExtendedFormat records contained in this workbook.
     *
     * @return int count of ExtendedFormat records
     */

    public int getNumExFormats()
    {
        log.log(DEBUG, "getXF=", new Integer(boundsheets.size()));
        return numxfs;
    }

    /**
     * gets the ExtendedFormatRecord at the given 0-based index
     *
     * @param index of the Extended format record (0-based)
     * @return ExtendedFormatRecord at the given index
     */

    public ExtendedFormatRecord getExFormatAt(int index)
    {
        int xfptr = xfpos - (numxfs - 1);

        xfptr += index;
        ExtendedFormatRecord retval =
            ( ExtendedFormatRecord ) records.get(xfptr);

        return retval;
    }

    /**
     * creates a new Cell-type Extneded Format Record and adds it to the end of
     *  ExtendedFormatRecords collection
     *
     * @return ExtendedFormatRecord that was created
     */

    public ExtendedFormatRecord createCellXF()
    {
        ExtendedFormatRecord xf = createExtendedFormat();

        ++xfpos;
        ++bspos;
        records.add(xfpos, xf);
        numxfs++;
        return xf;
    }

    /**
     * Adds a string to the SST table and returns its index (if its a duplicate
     * just returns its index and update the counts)
     *
     * @param string the string to be added to the SSTRecord
     * @param use16bits whether to use utf 16 or false for compressed unicode
     * @return index of the string within the SSTRecord
     */

    public int addSSTString(String string, boolean use16bits)
    {
        log.log(DEBUG, "insert to sst string='", string, "' and use16bits= ",
                new Boolean(use16bits));
        if (sst == null)
        {
            insertSST();
        }
        return sst.addString(string, use16bits);
    }

    /**
     * Adds a string to the SST table and returns its index (if its a duplicate
     * just returns its index and update the counts) ASSUMES compressed unicode
     * (meaning 8bit)
     *
     * @param string the string to be added to the SSTRecord
     *
     * @return index of the string within the SSTRecord
     */

    public int addSSTString(String string)
    {
        return addSSTString(string, false);
    }

    /**
     * given an index into the SST table, this function returns the corresponding String value
     * @return String containing the SST String
     */

    public String getSSTString(int str)
    {
        if (sst == null)
        {
            insertSST();
        }
        String retval = sst.getString(str);

        log.log(DEBUG, "Returning SST for index=", new Integer(str),
                " String= ", retval);
        return retval;
    }

    /**
     * use this function to add a Shared String Table to an existing sheet (say
     * generated by a different java api) without an sst....
     * @see #createSST()
     * @see org.apache.poi.hssf.record.SSTRecord
     */

    public void insertSST()
    {
        log.log(DEBUG, "creating new SST via insertSST!");
        sst = ( SSTRecord ) createSST();
        records.add(records.size() - 1, createExtendedSST());
        records.add(records.size() - 2, sst);
    }

    /**
     * Serializes all records int the worksheet section into a big byte array. Use
     * this to write the Workbook out.
     *
     * @return byte array containing the HSSF-only portions of the POIFS file.
     */

    public byte [] serialize()
    {
        log.log(DEBUG, "Serializing Workbook!");
        byte[] retval    = null;

        // ArrayList bytes     = new ArrayList(records.size());
        int    arraysize = getSize();
        int    pos       = 0;

        // for (int k = 0; k < records.size(); k++)
        // {
        // bytes.add((( Record ) records.get(k)).serialize());
//        }
        // for (int k = 0; k < bytes.size(); k++)
        // {
        // arraysize += (( byte [] ) bytes.get(k)).length;
        // }
        retval = new byte[ arraysize ];
        for (int k = 0; k < records.size(); k++)
        {

            // byte[] rec = (( byte [] ) bytes.get(k));
            // System.arraycopy(rec, 0, retval, pos, rec.length);
            pos += (( Record ) records.get(k)).serialize(pos,
                    retval);   // rec.length;
        }
        log.log(DEBUG, "Exiting serialize workbook");
        return retval;
    }

    /**
     * Serializes all records int the worksheet section into a big byte array. Use
     * this to write the Workbook out.
     * @param offset of the data to be written
     * @param data array of bytes to write this to
     */

    public int serialize(int offset, byte [] data)
    {
        log.log(DEBUG, "Serializing Workbook with offsets");

        // ArrayList bytes     = new ArrayList(records.size());
        int arraysize = getSize();   // 0;
        int pos       = 0;

//        for (int k = 0; k < records.size(); k++)
//        {
//            bytes.add((( Record ) records.get(k)).serialize());
//
//        }
//        for (int k = 0; k < bytes.size(); k++)
//       {
//            arraysize += (( byte [] ) bytes.get(k)).length;
//        }
        for (int k = 0; k < records.size(); k++)
        {

            // byte[] rec = (( byte [] ) bytes.get(k));
            // System.arraycopy(rec, 0, data, offset + pos, rec.length);
            pos += (( Record ) records.get(k)).serialize(pos + offset,
                    data);   // rec.length;
        }
        log.log(DEBUG, "Exiting serialize workbook");
        return pos;
    }

    public int getSize()
    {
        int retval = 0;

        for (int k = 0; k < records.size(); k++)
        {
            retval += (( Record ) records.get(k)).getRecordSize();
        }
        return retval;
    }

    /**
     * creates the BOF record
     * @see org.apache.poi.hssf.record.BOFRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a BOFRecord
     */

    protected Record createBOF()
    {
        BOFRecord retval = new BOFRecord();

        retval.setVersion(( short ) 0x600);
        retval.setType(( short ) 5);
        retval.setBuild(( short ) 0x10d3);

//        retval.setBuild((short)0x0dbb);        
        retval.setBuildYear(( short ) 1996);
        retval.setHistoryBitMask(0x41);   // was c1 before verify
        retval.setRequiredVersion(0x6);
        return retval;
    }

    /**
     * creates the InterfaceHdr record
     * @see org.apache.poi.hssf.record.InterfaceHdrRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a InterfaceHdrRecord
     */

    protected Record createInterfaceHdr()
    {
        InterfaceHdrRecord retval = new InterfaceHdrRecord();

        retval.setCodepage(CODEPAGE);
        return retval;
    }

    /**
     * creates an MMS record
     * @see org.apache.poi.hssf.record.MMSRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a MMSRecord
     */

    protected Record createMMS()
    {
        MMSRecord retval = new MMSRecord();

        retval.setAddMenuCount(( byte ) 0);
        retval.setDelMenuCount(( byte ) 0);
        return retval;
    }

    /**
     * creates the InterfaceEnd record
     * @see org.apache.poi.hssf.record.InterfaceEndRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a InterfaceEndRecord
     */

    protected Record createInterfaceEnd()
    {
        return new InterfaceEndRecord();
    }

    /**
     * creates the WriteAccess record containing the logged in user's name
     * @see org.apache.poi.hssf.record.WriteAccessRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a WriteAccessRecord
     */

    protected Record createWriteAccess()
    {
        WriteAccessRecord retval = new WriteAccessRecord();

        retval.setUsername(System.getProperty("user.name"));
        return retval;
    }

    /**
     * creates the Codepage record containing the constant stored in CODEPAGE
     * @see org.apache.poi.hssf.record.CodepageRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a CodepageRecord
     */

    protected Record createCodepage()
    {
        CodepageRecord retval = new CodepageRecord();

        retval.setCodepage(CODEPAGE);
        return retval;
    }

    /**
     * creates the DSF record containing a 0 since HSSF can't even create Dual Stream Files
     * @see org.apache.poi.hssf.record.DSFRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a DSFRecord
     */

    protected Record createDSF()
    {
        DSFRecord retval = new DSFRecord();

        retval.setDsf(
            ( short ) 0);   // we don't even support double stream files
        return retval;
    }

    /**
     * creates the TabId record containing an array of 0,1,2.  This release of HSSF
     * always has the default three sheets, no less, no more.
     * @see org.apache.poi.hssf.record.TabIdRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a TabIdRecord
     */

    protected Record createTabId()
    {
        TabIdRecord retval     = new TabIdRecord();
        short[]     tabidarray =
        {
            0
        };

        retval.setTabIdArray(tabidarray);
        return retval;
    }

    /**
     * creates the FnGroupCount record containing the Magic number constant of 14.
     * @see org.apache.poi.hssf.record.FnGroupCountRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a FnGroupCountRecord
     */

    protected Record createFnGroupCount()
    {
        FnGroupCountRecord retval = new FnGroupCountRecord();

        retval.setCount(( short ) 14);
        return retval;
    }

    /**
     * creates the WindowProtect record with protect set to false.
     * @see org.apache.poi.hssf.record.WindowProtectRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a WindowProtectRecord
     */

    protected Record createWindowProtect()
    {
        WindowProtectRecord retval = new WindowProtectRecord();

        retval.setProtect(
            false);   // by default even when we support it we won't
        return retval;   // want it to be protected
    }

    /**
     * creates the Protect record with protect set to false.
     * @see org.apache.poi.hssf.record.ProtectRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a ProtectRecord
     */

    protected Record createProtect()
    {
        ProtectRecord retval = new ProtectRecord();

        retval.setProtect(
            false);   // by default even when we support it we won't
        return retval;   // want it to be protected
    }

    /**
     * creates the Password record with password set to 0.
     * @see org.apache.poi.hssf.record.PasswordRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a PasswordRecord
     */

    protected Record createPassword()
    {
        PasswordRecord retval = new PasswordRecord();

        retval.setPassword(( short ) 0);   // no password by default!
        return retval;
    }

    /**
     * creates the ProtectionRev4 record with protect set to false.
     * @see org.apache.poi.hssf.record.ProtectionRev4Record
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a ProtectionRev4Record
     */

    protected Record createProtectionRev4()
    {
        ProtectionRev4Record retval = new ProtectionRev4Record();

        retval.setProtect(false);
        return retval;
    }

    /**
     * creates the PasswordRev4 record with password set to 0.
     * @see org.apache.poi.hssf.record.PasswordRev4Record
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a PasswordRev4Record
     */

    protected Record createPasswordRev4()
    {
        PasswordRev4Record retval = new PasswordRev4Record();

        retval.setPassword(( short ) 0);   // no password by default!
        return retval;
    }

    /**
     * creates the WindowOne record with the following magic values: <P>
     * horizontal hold - 0x168 <P>
     * vertical hold   - 0x10e <P>
     * width           - 0x3a5c <P>
     * height          - 0x23be <P>
     * options         - 0x38 <P>
     * selected tab    - 0 <P>
     * displayed tab   - 0 <P>
     * num selected tab- 0 <P>
     * tab width ratio - 0x258 <P>
     * @see org.apache.poi.hssf.record.WindowOneRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a WindowOneRecord
     */

    protected Record createWindowOne()
    {
        WindowOneRecord retval = new WindowOneRecord();

        retval.setHorizontalHold(( short ) 0x168);
        retval.setVerticalHold(( short ) 0x10e);
        retval.setWidth(( short ) 0x3a5c);
        retval.setHeight(( short ) 0x23be);
        retval.setOptions(( short ) 0x38);
        retval.setSelectedTab(( short ) 0x0);
        retval.setDisplayedTab(( short ) 0x0);
        retval.setNumSelectedTabs(( short ) 1);
        retval.setTabWidthRatio(( short ) 0x258);
        return retval;
    }

    /**
     * creates the Backup record with backup set to 0. (loose the data, who cares)
     * @see org.apache.poi.hssf.record.BackupRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a BackupRecord
     */

    protected Record createBackup()
    {
        BackupRecord retval = new BackupRecord();

        retval.setBackup(
            ( short ) 0);   // by default DONT save backups of files...just loose data
        return retval;
    }

    /**
     * creates the HideObj record with hide object set to 0. (don't hide)
     * @see org.apache.poi.hssf.record.HideObjRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a HideObjRecord
     */

    protected Record createHideObj()
    {
        HideObjRecord retval = new HideObjRecord();

        retval.setHideObj(( short ) 0);   // by default set hide object off
        return retval;
    }

    /**
     * creates the DateWindow1904 record with windowing set to 0. (don't window)
     * @see org.apache.poi.hssf.record.DateWindow1904Record
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a DateWindow1904Record
     */

    protected Record createDateWindow1904()
    {
        DateWindow1904Record retval = new DateWindow1904Record();

        retval.setWindowing(
            ( short ) 0);   // don't EVER use 1904 date windowing...tick tock..
        return retval;
    }

    /**
     * creates the Precision record with precision set to true. (full precision)
     * @see org.apache.poi.hssf.record.PrecisionRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a PrecisionRecord
     */

    protected Record createPrecision()
    {
        PrecisionRecord retval = new PrecisionRecord();

        retval.setFullPrecision(
            true);   // always use real numbers in calculations!
        return retval;
    }

    /**
     * creates the RefreshAll record with refreshAll set to true. (refresh all calcs)
     * @see org.apache.poi.hssf.record.RefreshAllRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a RefreshAllRecord
     */

    protected Record createRefreshAll()
    {
        RefreshAllRecord retval = new RefreshAllRecord();

        retval.setRefreshAll(false);
        return retval;
    }

    /**
     * creates the BookBool record with saveLinkValues set to 0. (don't save link values)
     * @see org.apache.poi.hssf.record.BookBoolRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a BookBoolRecord
     */

    protected Record createBookBool()
    {
        BookBoolRecord retval = new BookBoolRecord();

        retval.setSaveLinkValues(( short ) 0);
        return retval;
    }

    /**
     * creates a Font record with the following magic values: <P>
     * fontheight           = 0xc8<P>
     * attributes           = 0x0<P>
     * color palette index  = 0x7fff<P>
     * bold weight          = 0x190<P>
     * Font Name Length     = 5 <P>
     * Font Name            = Arial <P>
     *
     * @see org.apache.poi.hssf.record.FontRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a FontRecord
     */

    protected Record createFont()
    {
        FontRecord retval = new FontRecord();

        retval.setFontHeight(( short ) 0xc8);
        retval.setAttributes(( short ) 0x0);
        retval.setColorPaletteIndex(( short ) 0x7fff);
        retval.setBoldWeight(( short ) 0x190);
        retval.setFontNameLength(( byte ) 5);
        retval.setFontName("Arial");
        return retval;
    }

    /**
     * Creates a FormatRecord object
     * @param the number of the format record to create (meaning its position in
     *        a file as M$ Excel would create it.)
     * @return record containing a FormatRecord
     * @see org.apache.poi.hssf.record.FormatRecord
     * @see org.apache.poi.hssf.record.Record
     */

    protected Record createFormat(int id)
    {   // we'll need multiple editions for
        FormatRecord retval = new FormatRecord();   // the differnt formats

        switch (id)
        {

            case 0 :
                retval.setIndexCode(( short ) 5);
                retval.setFormatStringLength(( byte ) 0x17);
                retval.setFormatString("\"$\"#,##0_);\\(\"$\"#,##0\\)");
                break;

            case 1 :
                retval.setIndexCode(( short ) 6);
                retval.setFormatStringLength(( byte ) 0x1c);
                retval.setFormatString("\"$\"#,##0_);[Red]\\(\"$\"#,##0\\)");
                break;

            case 2 :
                retval.setIndexCode(( short ) 7);
                retval.setFormatStringLength(( byte ) 0x1d);
                retval.setFormatString("\"$\"#,##0.00_);\\(\"$\"#,##0.00\\)");
                break;

            case 3 :
                retval.setIndexCode(( short ) 8);
                retval.setFormatStringLength(( byte ) 0x22);
                retval.setFormatString(
                    "\"$\"#,##0.00_);[Red]\\(\"$\"#,##0.00\\)");
                break;

            case 4 :
                retval.setIndexCode(( short ) 0x2a);
                retval.setFormatStringLength(( byte ) 0x32);
                retval.setFormatString(
                    "_(\"$\"* #,##0_);_(\"$\"* \\(#,##0\\);_(\"$\"* \"-\"_);_(@_)");
                break;

            case 5 :
                retval.setIndexCode(( short ) 0x29);
                retval.setFormatStringLength(( byte ) 0x29);
                retval.setFormatString(
                    "_(* #,##0_);_(* \\(#,##0\\);_(* \"-\"_);_(@_)");
                break;

            case 6 :
                retval.setIndexCode(( short ) 0x2c);
                retval.setFormatStringLength(( byte ) 0x3a);
                retval.setFormatString(
                    "_(\"$\"* #,##0.00_);_(\"$\"* \\(#,##0.00\\);_(\"$\"* \"-\"??_);_(@_)");
                break;

            case 7 :
                retval.setIndexCode(( short ) 0x2b);
                retval.setFormatStringLength(( byte ) 0x31);
                retval.setFormatString(
                    "_(* #,##0.00_);_(* \\(#,##0.00\\);_(* \"-\"??_);_(@_)");
                break;
        }
        return retval;
    }

    /**
     * Creates an ExtendedFormatRecord object
     * @param the number of the extended format record to create (meaning its position in
     *        a file as MS Excel would create it.)
     *
     * @return record containing an ExtendedFormatRecord
     * @see org.apache.poi.hssf.record.ExtendedFormatRecord
     * @see org.apache.poi.hssf.record.Record
     */

    protected Record createExtendedFormat(int id)
    {   // we'll need multiple editions
        ExtendedFormatRecord retval = new ExtendedFormatRecord();

        switch (id)
        {

            case 0 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 1 :
                retval.setFontIndex(( short ) 1);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 2 :
                retval.setFontIndex(( short ) 1);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 3 :
                retval.setFontIndex(( short ) 2);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 4 :
                retval.setFontIndex(( short ) 2);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 5 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 6 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 7 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 8 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 9 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 10 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 11 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 12 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 13 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 14 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff400);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            // cell records
            case 15 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0);
                retval.setCellOptions(( short ) 0x1);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0x0);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            // style
            case 16 :
                retval.setFontIndex(( short ) 1);
                retval.setFormatIndex(( short ) 0x2b);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff800);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 17 :
                retval.setFontIndex(( short ) 1);
                retval.setFormatIndex(( short ) 0x29);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff800);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 18 :
                retval.setFontIndex(( short ) 1);
                retval.setFormatIndex(( short ) 0x2c);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff800);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 19 :
                retval.setFontIndex(( short ) 1);
                retval.setFormatIndex(( short ) 0x2a);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff800);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 20 :
                retval.setFontIndex(( short ) 1);
                retval.setFormatIndex(( short ) 0x9);
                retval.setCellOptions(( short ) 0xfffffff5);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0xfffff800);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            // unused from this point down
            case 21 :
                retval.setFontIndex(( short ) 5);
                retval.setFormatIndex(( short ) 0x0);
                retval.setCellOptions(( short ) 0x1);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0x800);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 22 :
                retval.setFontIndex(( short ) 6);
                retval.setFormatIndex(( short ) 0x0);
                retval.setCellOptions(( short ) 0x1);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0x5c00);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 23 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0x31);
                retval.setCellOptions(( short ) 0x1);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0x5c00);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 24 :
                retval.setFontIndex(( short ) 0);
                retval.setFormatIndex(( short ) 0x8);
                retval.setCellOptions(( short ) 0x1);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0x5c00);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;

            case 25 :
                retval.setFontIndex(( short ) 6);
                retval.setFormatIndex(( short ) 0x8);
                retval.setCellOptions(( short ) 0x1);
                retval.setAlignmentOptions(( short ) 0x20);
                retval.setIndentionOptions(( short ) 0x5c00);
                retval.setBorderOptions(( short ) 0);
                retval.setPaletteOptions(( short ) 0);
                retval.setAdtlPaletteOptions(( short ) 0);
                retval.setFillPaletteOptions(( short ) 0x20c0);
                break;
        }
        return retval;
    }

    /**
     * creates an default cell type ExtendedFormatRecord object.
     * @return ExtendedFormatRecord with intial defaults (cell-type)
     */

    protected ExtendedFormatRecord createExtendedFormat()
    {
        ExtendedFormatRecord retval = new ExtendedFormatRecord();

        retval.setFontIndex(( short ) 0);
        retval.setFormatIndex(( short ) 0x0);
        retval.setCellOptions(( short ) 0x1);
        retval.setAlignmentOptions(( short ) 0x20);
        retval.setIndentionOptions(( short ) 0);
        retval.setBorderOptions(( short ) 0);
        retval.setPaletteOptions(( short ) 0);
        retval.setAdtlPaletteOptions(( short ) 0);
        retval.setFillPaletteOptions(( short ) 0x20c0);
        return retval;
    }

    /**
     * Creates a StyleRecord object
     * @param the number of the style record to create (meaning its position in
     *        a file as MS Excel would create it.
     * @return record containing a StyleRecord
     * @see org.apache.poi.hssf.record.StyleRecord
     * @see org.apache.poi.hssf.record.Record
     */

    protected Record createStyle(int id)
    {   // we'll need multiple editions
        StyleRecord retval = new StyleRecord();

        switch (id)
        {

            case 0 :
                retval.setIndex(( short ) 0xffff8010);
                retval.setBuiltin(( byte ) 3);
                retval.setOutlineStyleLevel(( byte ) 0xffffffff);
                break;

            case 1 :
                retval.setIndex(( short ) 0xffff8011);
                retval.setBuiltin(( byte ) 6);
                retval.setOutlineStyleLevel(( byte ) 0xffffffff);
                break;

            case 2 :
                retval.setIndex(( short ) 0xffff8012);
                retval.setBuiltin(( byte ) 4);
                retval.setOutlineStyleLevel(( byte ) 0xffffffff);
                break;

            case 3 :
                retval.setIndex(( short ) 0xffff8013);
                retval.setBuiltin(( byte ) 7);
                retval.setOutlineStyleLevel(( byte ) 0xffffffff);
                break;

            case 4 :
                retval.setIndex(( short ) 0xffff8000);
                retval.setBuiltin(( byte ) 0);
                retval.setOutlineStyleLevel(( byte ) 0xffffffff);
                break;

            case 5 :
                retval.setIndex(( short ) 0xffff8014);
                retval.setBuiltin(( byte ) 5);
                retval.setOutlineStyleLevel(( byte ) 0xffffffff);
                break;
        }
        return retval;
    }

    /**
     * Creates the UseSelFS object with the use natural language flag set to 0 (false)
     * @return record containing a UseSelFSRecord
     * @see org.apache.poi.hssf.record.UseSelFSRecord
     * @see org.apache.poi.hssf.record.Record
     */

    protected Record createUseSelFS()
    {
        UseSelFSRecord retval = new UseSelFSRecord();

        retval.setFlag(( short ) 0);
        return retval;
    }

    /**
     * create a "bound sheet" or "bundlesheet" (depending who you ask) record
     * Always sets the sheet's bof to 0.  You'll need to set that yourself.
     * @param id either sheet 0,1 or 2.
     * @return record containing a BoundSheetRecord
     * @see org.apache.poi.hssf.record.BoundSheetRecord
     * @see org.apache.poi.hssf.record.Record
     */

    protected Record createBoundSheet(int id)
    {   // 1,2,3 sheets
        BoundSheetRecord retval = new BoundSheetRecord();

        switch (id)
        {

            case 0 :
                retval.setPositionOfBof(0x0);   // should be set later
                retval.setOptionFlags(( short ) 0);
                retval.setSheetnameLength(( byte ) 0x6);
                retval.setCompressedUnicodeFlag(( byte ) 0);
                retval.setSheetname("Sheet1");
                break;

            case 1 :
                retval.setPositionOfBof(0x0);   // should be set later
                retval.setOptionFlags(( short ) 0);
                retval.setSheetnameLength(( byte ) 0x6);
                retval.setCompressedUnicodeFlag(( byte ) 0);
                retval.setSheetname("Sheet2");
                break;

            case 2 :
                retval.setPositionOfBof(0x0);   // should be set later
                retval.setOptionFlags(( short ) 0);
                retval.setSheetnameLength(( byte ) 0x6);
                retval.setCompressedUnicodeFlag(( byte ) 0);
                retval.setSheetname("Sheet3");
                break;
        }
        return retval;
    }

    /**
     * Creates the Country record with the default and current country set to 1
     * @return record containing a CountryRecord
     * @see org.apache.poi.hssf.record.CountryRecord
     * @see org.apache.poi.hssf.record.Record
     */

    protected Record createCountry()
    {   // what a novel idea, create your own!
        CountryRecord retval = new CountryRecord();

        retval.setDefaultCountry(( short ) 1);
        retval.setCurrentCountry(( short ) 1);
        return retval;
    }

    /**
     * Creates the SST record with no strings and the unique/num string set to 0
     * @return record containing a SSTRecord
     * @see org.apache.poi.hssf.record.SSTRecord
     * @see org.apache.poi.hssf.record.Record
     */

    protected Record createSST()
    {
        return new SSTRecord();
    }

    /**
     * Creates the ExtendedSST record with numstrings per bucket set to 0x8.  HSSF
     * doesn't yet know what to do with this thing, but we create it with nothing in
     * it hardly just to make Excel happy and our sheets look like Excel's
     *
     * @return record containing an ExtSSTRecord
     * @see org.apache.poi.hssf.record.ExtSSTRecord
     * @see org.apache.poi.hssf.record.Record
     */

    protected Record createExtendedSST()
    {
        ExtSSTRecord retval = new ExtSSTRecord();

        retval.setNumStringsPerBucket(( short ) 0x8);
        return retval;
    }

    /**
     * creates the EOF record
     * @see org.apache.poi.hssf.record.EOFRecord
     * @see org.apache.poi.hssf.record.Record
     * @return record containing a EOFRecord
     */

    protected Record createEOF()
    {
        return new EOFRecord();
    }

    /**
     * Returns the first occurance of a record matching a particular sid.
     */

    public Record findFirstRecordBySid(short sid)
    {
        for (Iterator iterator = records.iterator(); iterator.hasNext(); )
        {
            Record record = ( Record ) iterator.next();

            if (record.getSid() == sid)
            {
                return record;
            }
        }
        return null;
    }
}