/**
 * Copyright 2011 The Open Source Research Group,
 *                University of Erlangen-Nürnberg
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package org.sweble.wom3.impl;

import org.sweble.wom3.Wom3TableCellBase;
import org.sweble.wom3.Wom3TableColumn;

public class TableColumnImpl
		implements
			Wom3TableColumn
{
	private final TablePartitionImpl partition;

	private final int col;

	// =========================================================================

	protected TableColumnImpl(TablePartitionImpl partition, int col)
	{
		this.partition = partition;
		this.col = col;
	}

	// =========================================================================

	@Override
	public int getColIndex()
	{
		isValidColumn();
		return col;
	}

	@Override
	public int getNumRows()
	{
		isValidColumn();
		return partition.getNumRows();
	}

	@Override
	public Wom3TableCellBase getCell(int row) throws IndexOutOfBoundsException
	{
		isValidColumn();
		return partition.getCell(row, col);
	}

	// =========================================================================

	private void isValidColumn()
	{
		if (partition.getNumCols() <= col)
			throw new IllegalStateException("This column is no longer valid (it was removed)");
	}
}
