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   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

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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.LittleEndianOutput;

Title:        Multiple Blank cell record(0x00BE)

Description:  Represents a  set of columns in a row with no value but with styling.

REFERENCE:  PG 329 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)
See Also:
BlankRecord/**
 * Title:        Multiple Blank cell record(0x00BE)<p>
 * Description:  Represents a  set of columns in a row with no value but with styling.<p>
 *
 * REFERENCE:  PG 329 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)
 * 
 * @see BlankRecord
 */
public final class MulBlankRecord extends StandardRecord {
	public final static short sid = 0x00BE;

	private final int _row;
	private final int _firstCol;
	private final short[] _xfs;
	private final int _lastCol;

	public MulBlankRecord(int row, int firstCol, short[] xfs) {
		_row = row;
		_firstCol = firstCol;
		_xfs = xfs;
		_lastCol = firstCol + xfs.length - 1;
	}

	
Returns:
the row number of the cells this represents/**
	 * @return the row number of the cells this represents
	 */
	public int getRow() {
		return _row;
	}

	
Returns:
starting column (first cell this holds in the row). Zero based/**
	 * @return starting column (first cell this holds in the row). Zero based
	 */
	public int getFirstColumn() {
		return _firstCol;
	}
	
	
Returns:
ending column (last cell this holds in the row). Zero based/**
	 * @return ending column (last cell this holds in the row). Zero based
	 */
	public int getLastColumn() {
		return _lastCol;
	}

	
get the number of columns this contains (last-first +1)
Returns:
number of columns (last - first +1)/**
	 * get the number of columns this contains (last-first +1)
	 * @return number of columns (last - first +1)
	 */
	public int getNumColumns() {
		return _lastCol - _firstCol + 1;
	}

	
returns the xf index for column (coffset = column - field_2_first_col)
Params:
coffset –  the column (coffset = column - field_2_first_col)
Returns:
the XF index for the column/**
	 * returns the xf index for column (coffset = column - field_2_first_col)
	 * @param coffset  the column (coffset = column - field_2_first_col)
	 * @return the XF index for the column
	 */
	public short getXFAt(int coffset) {
		return _xfs[coffset];
	}

	
Params:
in – the RecordInputstream to read the record from/**
	 * @param in the RecordInputstream to read the record from
	 */
	public MulBlankRecord(RecordInputStream in) {
		_row	   = in.readUShort();
		_firstCol = in.readShort();
		_xfs	   = parseXFs(in);
		_lastCol  = in.readShort();
	}

	private static short [] parseXFs(RecordInputStream in) {
		short[] retval = new short[(in.remaining() - 2) / 2];

		for (int idx = 0; idx < retval.length;idx++) {
		  retval[idx] = in.readShort();
		}
		return retval;
	}

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

		buffer.append("[MULBLANK]\n");
		buffer.append("row  = ").append(Integer.toHexString(getRow())).append("\n");
		buffer.append("firstcol  = ").append(Integer.toHexString(getFirstColumn())).append("\n");
		buffer.append(" lastcol  = ").append(Integer.toHexString(_lastCol)).append("\n");
		for (int k = 0; k < getNumColumns(); k++) {
			buffer.append("xf").append(k).append("		= ").append(
					Integer.toHexString(getXFAt(k))).append("\n");
		}
		buffer.append("[/MULBLANK]\n");
		return buffer.toString();
	}

	public short getSid() {
		return sid;
	}

	public void serialize(LittleEndianOutput out) {
		out.writeShort(_row);
		out.writeShort(_firstCol);
		int nItems = _xfs.length;
		for (int i = 0; i < nItems; i++) {
			out.writeShort(_xfs[i]);
		}
		out.writeShort(_lastCol);
	}

	protected int getDataSize() {
		// 3 short fields + array of shorts
		return 6 + _xfs.length * 2;
	}

	@Override
	public MulBlankRecord clone() {
		// immutable - so OK to return this
		return this;
	}
}