/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */

package org.apache.poi.hssf.record;

import org.apache.poi.util.BitField;
import org.apache.poi.util.BitFieldFactory;
import org.apache.poi.util.HexDump;
import org.apache.poi.util.LittleEndianOutput;

/**
 * Title: Double Stream Flag Record (0x0161)<p>
 * Description:  tells if this is a double stream file. (always no for HSSF generated files)<p>
 *               Double Stream files contain both BIFF8 and BIFF7 workbooks.<p>
 * REFERENCE:  PG 305 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)
 */
public final class DSFRecord extends StandardRecord {
    public final static short sid = 0x0161;

    private static final BitField biff5BookStreamFlag = BitFieldFactory.getInstance(0x0001);

    private int _options;

    private DSFRecord(int options) {
        _options = options;
    }
    public DSFRecord(boolean isBiff5BookStreamPresent) {
        this(0);
        _options = biff5BookStreamFlag.setBoolean(0, isBiff5BookStreamPresent);
    }

    public DSFRecord(RecordInputStream in) {
        this(in.readShort());
    }

    public boolean isBiff5BookStreamPresent() {
        return biff5BookStreamFlag.isSet(_options);
    }

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

        buffer.append("[DSF]\n");
        buffer.append("    .options = ").append(HexDump.shortToHex(_options)).append("\n");
        buffer.append("[/DSF]\n");
        return buffer.toString();
    }

    public void serialize(LittleEndianOutput out) {
        out.writeShort(_options);
    }

    protected int getDataSize() {
        return 2;
    }

    public short getSid() {
        return sid;
    }
}