poi/src/java/org/apache/poi/hssf/record/TabIdRecord.java

/* ====================================================================
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 *        Apache Software Foundation (http://www.apache.org/)."
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 */

package org.apache.poi.hssf.record;

import org.apache.poi.util.LittleEndian;

/**
 * Title: Sheet Tab Index Array Record<P>
 * Description:  Contains an array of sheet id's.  Sheets always keep their ID
 *               regardless of what their name is.<P>
 * REFERENCE:  PG 412 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)<P>
 * @author Andrew C. Oliver (acoliver at apache dot org)
 * @version 2.0-pre
 */

public class TabIdRecord
    extends Record
{
    public final static short sid = 0x13d;
    public short[]            field_1_tabids;

    public TabIdRecord()
    {
    }

    /**
     * Constructs a TabID record and sets its fields appropriately.
     *
     * @param id     id must be 0x13d or an exception will be throw upon validation
     * @param size  the size of the data area of the record
     * @param data  data of the record (should not contain sid/len)
     */

    public TabIdRecord(short id, short size, byte [] data)
    {
        super(id, size, data);
    }

    /**
     * Constructs a TabID record and sets its fields appropriately.
     *
     * @param id     id must be 0x13d or an exception will be throw upon validation
     * @param size  the size of the data area of the record
     * @param data  data of the record (should not contain sid/len)
     * @param offset of the record
     */

    public TabIdRecord(short id, short size, byte [] data, int offset)
    {
        super(id, size, data, offset);
    }

    protected void validateSid(short id)
    {
        if (id != sid)
        {
            throw new RecordFormatException("NOT A TABID RECORD");
        }
    }

    protected void fillFields(byte [] data, short size, int offset)
    {
        field_1_tabids = new short[ size / 2 ];
        for (int k = 0; k < field_1_tabids.length; k++)
        {
            field_1_tabids[ k ] = LittleEndian.getShort(data,
                                                        (k * 2) + offset);
        }
    }

    /**
     * set the tab array.  (0,1,2).
     * @param array of tab id's {0,1,2}
     */

    public void setTabIdArray(short [] array)
    {
        field_1_tabids = array;
    }

    /**
     * get the tab array.  (0,1,2).
     * @return array of tab id's {0,1,2}
     */

    public short [] getTabIdArray()
    {
        return field_1_tabids;
    }

    public String toString()
    {
        StringBuffer buffer = new StringBuffer();

        buffer.append("[TABID]\n");
        buffer.append("    .elements        = ").append(field_1_tabids.length)
            .append("\n");
        for (int k = 0; k < field_1_tabids.length; k++)
        {
            buffer.append("    .element_" + k + "       = ")
                .append(field_1_tabids[ k ]).append("\n");
        }
        buffer.append("[/TABID]\n");
        return buffer.toString();
    }

    public int serialize(int offset, byte [] data)
    {
        short[] tabids     = getTabIdArray();
        short   length     = ( short ) (tabids.length * 2);
        int     byteoffset = 4;

        LittleEndian.putShort(data, 0 + offset, sid);
        LittleEndian.putShort(data, 2 + offset,
                              (( short ) length));   // nubmer tabids *

        // 2 (num bytes in a short)
        for (int k = 0; k < (length / 2); k++)
        {
            LittleEndian.putShort(data, byteoffset + offset, tabids[ k ]);
            byteoffset += 2;
        }
        return getRecordSize();
    }

    public int getRecordSize()
    {
        return 4 + (getTabIdArray().length * 2);
    }

    public short getSid()
    {
        return this.sid;
    }
}