net.sf.jasperreports.engine.BookmarkIterator Maven / Gradle / Ivy
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2016 TIBCO Software 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 .
*/
package net.sf.jasperreports.engine;
import java.util.Deque;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;
import net.sf.jasperreports.engine.base.BasePrintBookmark;
/**
* @author Lucian Chirita ([email protected])
*/
public class BookmarkIterator
{
private Deque stack = new LinkedList();
public BookmarkIterator(BasePrintBookmark root)
{
// populating the queue with root bookmarks
pushChildren(root);
}
private void pushChildren(BasePrintBookmark bookmark)
{
List children = bookmark.getBookmarks();
if (children != null)
{
// pushing in reverse order to preserve children iteration order
for (ListIterator it = children.listIterator(children.size()); it.hasPrevious();)
{
BasePrintBookmark child = (BasePrintBookmark) it.previous();
stack.push(child);
}
}
}
public boolean hasBookmark()
{
return !stack.isEmpty();
}
public BasePrintBookmark bookmark()
{
return stack.peek();
}
public void next()
{
BasePrintBookmark bookmark = stack.pop();
pushChildren(bookmark);
}
}