eulermind.importer.FreemindImporter.java Source code

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Here is the source code for eulermind.importer.FreemindImporter.java

Source

package eulermind.importer;

import eulermind.MindDB;
import com.tinkerpop.blueprints.Vertex;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import java.io.FileInputStream;
import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

/*
The MIT License (MIT)
Copyright (c) 2012-2014 wangxuguang ninesunqian@163.com
    
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
    
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
    
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

public class FreemindImporter extends Importer {

    static Logger s_logger = LoggerFactory.getLogger(FreemindImporter.class);

    public FreemindImporter(MindDB mindDB) {
        super(mindDB);
    }

    private Object importFreemindNode(Object parentDBId, int pos, org.w3c.dom.Element element,
            HashMap<String, Object> mmId2dbIdMap, HashMap<String, String> mmLinkMap) {
        String mmId = element.getAttribute("ID");
        String text = element.getAttribute("TEXT");

        Object dbId = addTextDBChild(parentDBId, pos, text);
        progressStep(text);

        mmId2dbIdMap.put(mmId, dbId);

        String linkAttribute = element.getAttribute("LINK");
        if (linkAttribute.length() > 1 && linkAttribute.substring(0, 4).equals("#ID_")) {
            mmLinkMap.put(mmId, linkAttribute.substring(1));
        }

        NodeList nodes = element.getChildNodes();
        int childPos = 0;

        for (int i = 0; i < nodes.getLength() && m_canceled == false; i++) {
            org.w3c.dom.Node node = nodes.item(i);
            if (node.getNodeName().equals("node")) {
                importFreemindNode(dbId, childPos, (Element) node, mmId2dbIdMap, mmLinkMap);
                childPos++;
                //process child element
            } else if (node.getNodeName().equals("arrowlink")) {
                mmLinkMap.put(mmId, ((Element) node).getAttribute("DESTINATION"));
            }
        }

        return dbId;
    }

    private List importFromInputStream(Object parentDBId, int pos, InputStream inputStream)
            throws IOException, SAXException, ParserConfigurationException {

        ArrayList newChildren = new ArrayList();

        DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
        //Load and parse XML file into DOM
        Document document = null;
        //DOM parser instance
        DocumentBuilder builder = builderFactory.newDocumentBuilder();
        //parse an XML file into a DOM tree
        document = builder.parse(inputStream);

        NodeList nodeList = document.getElementsByTagName("node");
        resetProgress(nodeList.getLength());

        //get root element
        Element rootElement = document.getDocumentElement();

        HashMap<String, Object> mmId2dbIdMap = new HashMap<String, Object>();
        HashMap<String, String> mmLinkMap = new HashMap<String, String>();

        //traverse child elements
        NodeList nodes = rootElement.getChildNodes();
        for (int i = 0; i < nodes.getLength(); i++) {
            org.w3c.dom.Node node = nodes.item(i);
            if (node.getNodeName().equals("node")) {
                Object newChild = importFreemindNode(parentDBId, pos, (Element) node, mmId2dbIdMap, mmLinkMap);
                newChildren.add(newChild);
                //process child element
            }
        }

        for (String mmLinkSource : mmLinkMap.keySet()) {
            String mmLinkTarget = mmLinkMap.get(mmLinkSource);

            //s_logger.info("import freemind link {} -> {}", mmLinkSource, mmLinkTarget);
            Object dbLinkSource = mmId2dbIdMap.get(mmLinkSource);
            Object dbLinkTarget = mmId2dbIdMap.get(mmLinkTarget);

            if (dbLinkSource != null && dbLinkTarget != null) {
                //s_logger.info("import link {} -> {}", dbLinkSource, dbLinkTarget);

                Vertex vertexSource = m_mindDb.getVertex(dbLinkSource);
                Vertex vertexTarget = m_mindDb.getVertex(dbLinkTarget);
                m_mindDb.addRefEdge(vertexSource, vertexTarget);
            }
        }

        return newChildren;
    }

    public List importFile(Object parentDBId, int pos, String path)
            throws IOException, SAXException, ParserConfigurationException {
        FileInputStream inputStream = new FileInputStream(path);
        return importFromInputStream(parentDBId, pos, inputStream);

    }

    public List importString(Object parentDBId, int pos, final String str) throws Exception {
        InputStream inputStream = IOUtils.toInputStream(str, "UTF-8");
        return importFromInputStream(parentDBId, pos, inputStream);
    }
}