net.sourceforge.ganttproject.io.OptionSaver.java Source code

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Here is the source code for net.sourceforge.ganttproject.io.OptionSaver.java

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/*
Copyright 2012 GanttProject Team
    
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.io;

import java.util.Arrays;
import java.util.Map;

import javax.xml.transform.sax.TransformerHandler;

import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;

import com.google.common.base.Function;
import com.google.common.collect.Maps;

import biz.ganttproject.core.option.GPOption;
import biz.ganttproject.core.option.ListOption;

/**
 * Saves GPOption instances to XML as &lt;option&gt; tags.
 *
 * @author dbarashev (Dmitry Barashev)
 */
public class OptionSaver extends SaverBase {
    public void saveOptionList(TransformerHandler handler, GPOption<?>... options) throws SAXException {
        saveOptionList(handler, Arrays.asList(options));
    }

    public void saveOptionList(TransformerHandler handler, Iterable<GPOption<?>> options) throws SAXException {
        saveOptionMap(Maps.uniqueIndex(options, new Function<GPOption<?>, String>() {
            @Override
            public String apply(GPOption<?> value) {
                return value.getID();
            }
        }).entrySet(), handler);
    }

    public void saveOptionMap(Iterable<Map.Entry<String, GPOption<?>>> options, TransformerHandler handler)
            throws SAXException {
        AttributesImpl attrs = new AttributesImpl();
        for (Map.Entry<String, GPOption<?>> entry : options) {
            GPOption<?> option = entry.getValue();
            if (option.getPersistentValue() != null) {
                addAttribute("id", entry.getKey(), attrs);
                if (option instanceof ListOption) {
                    cdataElement("option", option.getPersistentValue(), attrs, handler);
                } else {
                    addAttribute("value", option.getPersistentValue(), attrs);
                    emptyElement("option", attrs, handler);
                }
            }
        }
    }
}