filepassrecord.java

来自「EXCEL read and write」· Java 代码 · 共 87 行

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   this work for additional information regarding copyright ownership.
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       http://www.apache.org/licenses/LICENSE-2.0

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   distributed under the License is distributed on an "AS IS" BASIS,
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   See the License for the specific language governing permissions and
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package org.apache.poi.hssf.record;

import org.apache.poi.util.LittleEndian;

/**
 * Title:        File Pass Record<P>
 * Description:  Indicates that the record after this record are encrypted. HSSF does not support encrypted excel workbooks
 * and the presence of this record will cause processing to be aborted.<p>
 * REFERENCE:  PG 420 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)<P>
 * @author Jason Height (jheight at chariot dot net dot au)
 * @version 3.0-pre
 */

public class FilePassRecord
    extends Record
{
    public final static short sid = 0x2F;
    private int             field_1_encryptedpassword;

    public FilePassRecord()
    {
    }

    public FilePassRecord(RecordInputStream in)
    {
        field_1_encryptedpassword = in.readInt();
        
        //Whilst i have read in the password, HSSF currently has no plans to support/decrypt the remainder
        //of this workbook
        throw new RecordFormatException("HSSF does not currently support encrypted workbooks");
    }

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

        buffer.append("[FILEPASS]\n");
        buffer.append("    .password        = ").append(field_1_encryptedpassword)
            .append("\n");
        buffer.append("[/FILEPASS]\n");
        return buffer.toString();
    }

    public int serialize(int offset, byte [] data)
    {
        LittleEndian.putShort(data, 0 + offset, sid);
        LittleEndian.putShort(data, 2 + offset, ( short ) 0x4);
        LittleEndian.putInt(data, 4 + offset, ( short ) field_1_encryptedpassword);
        return getRecordSize();
    }

    public int getRecordSize()
    {
        return 8;
    }

    public short getSid()
    {
        return sid;
    }

    public Object clone() {
      FilePassRecord rec = new FilePassRecord();
      rec.field_1_encryptedpassword = field_1_encryptedpassword;
      return rec;
    }
}