/*
Copyright 2014 BarD Software s.r.o
This file is part of GanttProject, an opensource project management tool.
GanttProject is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GanttProject 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GanttProject. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sourceforge.ganttproject.parser;
import org.xml.sax.Attributes;
import com.google.common.base.Objects;
import biz.ganttproject.core.option.GPOption;
import biz.ganttproject.core.option.ListOption;
/**
* Tag handler which writes parsed value to GPOption instance.
*
* This handler reads "id" and "value" attributes of <option> tag. If id
* equals to the id of the passed option, handler asks option to load its persistent
* value from "value" attribute, unless option is a ListOption. In the latter case
* its value is read from CDATA between the opening and closing tags
*
* @author dbarashev (Dmitry Barashev)
*
* @param <T> option class
*/
public class OptionTagHandler<T extends GPOption<?>> extends AbstractTagHandler {
private T myOption;
public OptionTagHandler(T option) {
super("option", option instanceof ListOption);
myOption = option;
}
@Override
protected boolean onStartElement(Attributes attrs) {
if (!Objects.equal(attrs.getValue("id"), myOption.getID())) {
return false;
}
if (!hasCdata()) {
myOption.loadPersistentValue(attrs.getValue("value"));
}
return super.onStartElement(attrs);
}
@Override
public void onEndElement() {
if (hasCdata()) {
myOption.loadPersistentValue(getCdata());
clearCdata();
}
}
}