/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2023 Cloud Software Group, Inc. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.jasperreports.engine.util;

import net.sf.jasperreports.engine.BookmarkHelper;
import net.sf.jasperreports.engine.BookmarkIterator;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRField;
import net.sf.jasperreports.engine.base.BasePrintBookmark;
import net.sf.jasperreports.engine.data.JRAbstractBeanDataSource;

/**
 * @author Lucian Chirita (lucianc@users.sourceforge.net)
 */
public class BookmarksFlatDataSource extends JRAbstractBeanDataSource
{

	private boolean first;
	private BookmarkIterator bookmarkIterator;

	public BookmarksFlatDataSource(BookmarkHelper bookmarks)
	{
		super(false);
		
		bookmarkIterator = bookmarks == null ? null : bookmarks.bookmarkIterator();
		first = true;
	}

	@Override
	public void moveFirst() throws JRException
	{
		throw new UnsupportedOperationException();
	}

	@Override
	public boolean next() throws JRException
	{
		if (first)
		{
			first = false;
			return bookmarkIterator != null && bookmarkIterator.hasBookmark();
		}
		
		bookmarkIterator.next();
		return bookmarkIterator.hasBookmark();
	}

	@Override
	public Object getFieldValue(JRField field) throws JRException
	{
		BasePrintBookmark bookmark = bookmarkIterator.bookmark();
		return getFieldValue(bookmark, field);
	}

}
