XMLDomMapleData.java

/*
 This file is part of the OdinMS Maple Story Server
 Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
 Matthias Butz <matze@odinms.de>
 Jan Christian Meyer <vimes@odinms.de>

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero General Public License as
 published by the Free Software Foundation version 3 as published by
 the Free Software Foundation. You may not use, modify or distribute
 this program under any other version of the GNU Affero General Public
 License.

 This program 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 Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package provider.wz;

import java.awt.Point;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import provider.MapleData;
import provider.MapleDataEntity;

public class XMLDomMapleData implements MapleData {

    private Node node;
    private File imageDataDir;

    public XMLDomMapleData(FileInputStream fis, File imageDataDir) {
        try { 
            DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            Reader reader = new InputStreamReader(fis, "UTF-8");
            InputSource source = new InputSource(reader);
            Document document = documentBuilder.parse(source);
            this.node = document.getFirstChild();
        } catch (ParserConfigurationException | SAXException | IOException e) {
            throw new RuntimeException(e);
        }
        this.imageDataDir = imageDataDir;
    }  

    private XMLDomMapleData(Node node) {
        this.node = node;
    }

    @Override
    public MapleData getChildByPath(String path) {
        String segments[] = path.split("/");
        if (segments[0].equals("..")) {
            return ((MapleData) getParent()).getChildByPath(path.substring(path.indexOf("/") + 1));
        }

        Node myNode = node;
        for (String segment : segments) {
            NodeList childNodes = myNode.getChildNodes();
            boolean foundChild = false;
            for (int i = 0; i < childNodes.getLength(); i++) {
                Node childNode = childNodes.item(i);
                if (childNode.getNodeType() == Node.ELEMENT_NODE && childNode.getAttributes().getNamedItem("name").getNodeValue().equals(segment)) {
                    myNode = childNode;
                    foundChild = true;
                    break;
                }
            }
            if (!foundChild) {
                return null;
            }
        }
        XMLDomMapleData ret = new XMLDomMapleData(myNode);
        ret.imageDataDir = new File(imageDataDir, getName() + "/" + path).getParentFile();
        return ret;
    }

    @Override
    public List<MapleData> getChildren() {
        List<MapleData> ret = new ArrayList<>();
        NodeList childNodes = node.getChildNodes();
        for (int i = 0; i < childNodes.getLength(); i++) {
            Node childNode = childNodes.item(i);
            if (childNode.getNodeType() == Node.ELEMENT_NODE) {
                XMLDomMapleData child = new XMLDomMapleData(childNode);
                child.imageDataDir = new File(imageDataDir, getName());
                ret.add(child);
            }
        }
        return ret;
    }

    @Override
    public Object getData() {
        NamedNodeMap attributes = node.getAttributes();
        MapleDataType type = getType();
        switch (type) {
            case DOUBLE:
            case FLOAT:
            case INT:
            case SHORT:
            case STRING:
            case UOL: {
                String value = attributes.getNamedItem("value").getNodeValue();
                switch (type) {
                    case DOUBLE:
                        return Double.parseDouble(value);
                    case FLOAT:
                        return Float.parseFloat(value);
                    case INT:
                        return Integer.parseInt(value);
                    case SHORT:
                        return Short.parseShort(value);
                    case STRING:
                    case UOL:
                        return value;
                }
            }
            case VECTOR: {
                String x = attributes.getNamedItem("x").getNodeValue();
                String y = attributes.getNamedItem("y").getNodeValue();
                return new Point(Integer.parseInt(x), Integer.parseInt(y));
            }
            case CANVAS: {
                String width = attributes.getNamedItem("width").getNodeValue();
                String height = attributes.getNamedItem("height").getNodeValue();
                return new FileStoredPngMapleCanvas(Integer.parseInt(width), Integer.parseInt(height), new File(
                        imageDataDir, getName() + ".png"));
            }
        }
        return null;
    }

    @Override
    public MapleDataType getType() {
        String nodeName = node.getNodeName();
        switch (nodeName) {
            case "imgdir":
                return MapleDataType.PROPERTY;
            case "canvas":
                return MapleDataType.CANVAS;
            case "convex":
                return MapleDataType.CONVEX;
            case "sound":
                return MapleDataType.SOUND;
            case "uol":
                return MapleDataType.UOL;
            case "double":
                return MapleDataType.DOUBLE;
            case "float":
                return MapleDataType.FLOAT;
            case "int":
                return MapleDataType.INT;
            case "short":
                return MapleDataType.SHORT;
            case "string":
                return MapleDataType.STRING;
            case "vector":
                return MapleDataType.VECTOR;
            case "null":
                return MapleDataType.IMG_0x00;
        }
        return null;
    }

    @Override
    public MapleDataEntity getParent() {
        Node parentNode = node.getParentNode();
        if (parentNode.getNodeType() == Node.DOCUMENT_NODE) {
            return null;
        }
        XMLDomMapleData parentData = new XMLDomMapleData(parentNode);
        parentData.imageDataDir = imageDataDir.getParentFile();
        return parentData;
    }

    @Override
    public String getName() {
        return node.getAttributes().getNamedItem("name").getNodeValue();
    }

    @Override
    public Iterator<MapleData> iterator() {
        return getChildren().iterator();
    }
}