/* File: XMLParser.java University of Applied Science Berne,HTA-Biel/Bienne, Computer Science Department. Diploma thesis J3D Solar System Simulator Originally written by Marcel Portner & Bernhard Hari (c) 2000 CVS - Information : $Header: /var/cvsreps/projects/c450/2000/sss3d/source_diploma/sss3d/utils/xmlparser/XMLParser.java,v 1.11 2000/12/13 13:42:17 portm Exp $ $Author: portm $ $Date: 2000/12/13 13:42:17 $ $State: Exp $ */ package sss3d.utils.xmlparser; import sss3d.contentbranch.*; import sss3d.utils.SSS3dConstants; import java.io.*; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.FactoryConfigurationError; import javax.xml.parsers.ParserConfigurationException; import javax.xml.parsers.DocumentBuilder; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; import java.io.File; import java.io.IOException; import org.w3c.dom.*; import java.util.Hashtable; /** * This class is used to parse an XML document. The XML file * holds important data about a celestial object or * the initialization state of the solar system simulator. * *

 *    use : 
 *    XMLParser xmlp = new XMLParser(CelestialObjectInfo, "fully qualified path");
 *    xmlp.read();
 *

* * @author Marcel Portner & Bernhard Hari * @version $Revision: 1.11 $ * @see sss3d.contentbranch.CelestialObjectInfo * @see sss3d.contentbranch.InitializationObject * @see sss3d.utils.observer.ObjectsInformation */ public class XMLParser { private String path; private InitializationObject iniObject; private CelestialObjectInfo cObjInfo; /** * Constructs an object of an XMLParser. * * @param object an object to store the information from the file. * @param type the type of this xml file defined inside class SSS3dConstants * @param path path to the file containing the information */ public XMLParser(Object object,int type, String path) { if ( type == XMLConstants.XML_CELESTIALOBJECT ) { this.cObjInfo = (CelestialObjectInfo)object; } else if( type == XMLConstants.XML_INITIALIZATION ) { this.iniObject = (InitializationObject)object; } this.path = path.toLowerCase(); } /** * Method parses an XML file. Depending on the parameters and * their values it stores the information in the InitializationObject. * * @exception IOExecption throws an IOException in case of a read error */ private void parseInitializationFile() throws IOException { // get current document from CelestialObjectInfo Document document = (Document)iniObject.getParameter(XMLConstants.DOCUMENT); Hashtable parameters = new Hashtable(); // initialize hashtable for (int i = XMLConstants.INITIALIZATION_NAMES_MIN; i <= XMLConstants.INITIALIZATION_NAMES_MAX; i++) { parameters.put(XMLConstants.treeElementNames[i], new Integer(i)); } if ( document != null ) { // iterate over each possible element tag // defined in class XMLConstants for(int tag = XMLConstants.INITIALIZATION_NAMES_MIN; tag <= XMLConstants.INITIALIZATION_NAMES_MAX; tag++ ) { // get node of specific tag // show only leaf nodes String nodeName = XMLConstants.treeElementNames[tag]; if ( !nodeName.equals("ini") && !nodeName.equals("info") && !nodeName.equals("values") ) { NodeList nodes = document.getElementsByTagName(nodeName); // search for value of node == nodeName for(int i = 0; i < nodes.getLength(); i++) { Node child = nodes.item(i); if ( child.hasChildNodes() && !( nodeName.equals(XMLConstants.treeElementNames[XMLConstants.STAR]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.PLANET]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.MOON]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.COMET]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.SATELLITE]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.ROCKET]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.ANIMATIONSPEED]) )) { NodeList nl = child.getChildNodes(); for(int j = 0; j < nl.getLength(); j++) { if ( nl.item(j).getNodeType() == XMLConstants.TEXT_TYPE ) { // get this value and set it correctly inside // CelestialObjectInfo..... Integer n = (Integer)parameters.get( child.getNodeName() ); String value = nl.item(j).getNodeValue(); //System.out.println("Name "+child.getNodeName()+" Value "+value); /*System.out.println("Parameter = "+child.getNodeName()+ " Value = "+nl.item(j).getNodeValue()); */ if (n != null) { switch ( n.intValue() ){ case XMLConstants.FILETYPE : iniObject.setParameter(value,XMLConstants.FILETYPE); break; case XMLConstants.ID : iniObject.setParameter(value,XMLConstants.ID); break; case XMLConstants.FILENAME : iniObject.setParameter(value,XMLConstants.FILENAME); break; case XMLConstants.PATH : iniObject.setParameter(value,XMLConstants.PATH); break; case XMLConstants.DAY : iniObject.setParameter(new Integer(value),XMLConstants.DAY); break; case XMLConstants.MONTH : iniObject.setParameter(new Integer(value),XMLConstants.MONTH); break; case XMLConstants.YEAR : iniObject.setParameter(new Integer(value),XMLConstants.YEAR); break; case XMLConstants.HOUR : iniObject.setParameter(new Integer(value),XMLConstants.HOUR); break; case XMLConstants.MINUTES : iniObject.setParameter(new Integer(value),XMLConstants.MINUTES); break; case XMLConstants.SECONDS : iniObject.setParameter(new Integer(value),XMLConstants.SECONDS); break; case XMLConstants.JDAY : iniObject.setParameter(new Double(value),XMLConstants.JDAY); break; case XMLConstants.CALCULATION : if ( value.equals("kepler") ) { iniObject.setParameter(new Integer(SSS3dConstants.KEPLER),XMLConstants.CALCULATION); } else if ( value.equals("ellipse") ) { iniObject.setParameter(new Integer(SSS3dConstants.ELLIPSE),XMLConstants.CALCULATION); } else if ( value.equals("analytic") ) { iniObject.setParameter(new Integer(SSS3dConstants.ANALYTIC),XMLConstants.CALCULATION); } else { // in case of an unmatching value, use kepler as default calculation method iniObject.setParameter(new Integer(SSS3dConstants.KEPLER),XMLConstants.CALCULATION); } break; /*case XMLConstants.ANIMATIONSPEED : iniObject.setParameter(new Integer(value),XMLConstants.ANIMATIONSPEED); break; */ case XMLConstants.COMPRESSED : iniObject.setParameter(new Boolean(value),XMLConstants.COMPRESSED); break; case XMLConstants.GLASSES3D : iniObject.setParameter(new Boolean(value),XMLConstants.GLASSES3D); break; case XMLConstants.JOYSTICK : iniObject.setParameter(new Boolean(value),XMLConstants.JOYSTICK); break; case XMLConstants.CAMERAATORIGIN : iniObject.setParameter(new Boolean(value),XMLConstants.CAMERAATORIGIN); break; case XMLConstants.CAMERA : boolean found = false; value = value.toLowerCase(); for( int camera = 0; camera < SSS3dConstants.CAMERA_POSITIONS.length;camera++) { if ( value.equals( (SSS3dConstants.CAMERA_POSITIONS[camera]).toLowerCase() ) ) { iniObject.setParameter(new Integer(camera),XMLConstants.CAMERA); found = true; break; } } if ( !found ) { // in case of an unmatching value, use kepler as default calculation method iniObject.setParameter(new Integer(SSS3dConstants.CAMERA_DEFAULT),XMLConstants.CAMERA); } break; default : break; } } } } } else if(nodeName.equals(XMLConstants.treeElementNames[XMLConstants.ANIMATIONSPEED]) ){ AnimationSpeed animationSpeed; NamedNodeMap nnm = child.getAttributes(); Node type = nnm.getNamedItem(XMLConstants.treeElementNames[XMLConstants.TYPE]); Node value = nnm.getNamedItem(XMLConstants.treeElementNames[XMLConstants.VALUE]); String nodeValue = type.getNodeValue(); int t = AnimationSpeed.DAYS_PER_SECOND; if ( nodeValue.equals(AnimationSpeed.NAMES[AnimationSpeed.HOURS_PER_SECOND]) ) { t = AnimationSpeed.HOURS_PER_SECOND; } else if( nodeValue.equals(AnimationSpeed.NAMES[AnimationSpeed.MINUTES_PER_SECOND]) ) { t = AnimationSpeed.MINUTES_PER_SECOND; } try { int v = (new Integer(value.getNodeValue())).intValue(); animationSpeed = new AnimationSpeed( t, v ); System.out.println(animationSpeed.toString()); } catch (NumberFormatException e) { // create animationspeed with default values animationSpeed = new AnimationSpeed(); } iniObject.setParameter(animationSpeed, XMLConstants.ANIMATIONSPEED); } else if(nodeName.equals(XMLConstants.treeElementNames[XMLConstants.STAR]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.PLANET]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.MOON]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.COMET]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.SATELLITE]) || nodeName.equals(XMLConstants.treeElementNames[XMLConstants.ROCKET]) ){ IniData data; // find out parent //System.out.println("NODENAME ---->>>>>>>>>> "+nodeName); Node parentNode = child.getParentNode(); NamedNodeMap pnnm = parentNode.getAttributes(); Node attribute = pnnm.getNamedItem(XMLConstants.treeElementNames[XMLConstants.OBJECTNAME]); int type = SSS3dConstants.UNKNOWN_TYPE; if ( nodeName.equals(SSS3dConstants.TYPES[SSS3dConstants.STAR_TYPE]) ) { type = SSS3dConstants.STAR_TYPE; } else if ( nodeName.equals(SSS3dConstants.TYPES[SSS3dConstants.PLANET_TYPE]) ) { type = SSS3dConstants.PLANET_TYPE; } else if ( nodeName.equals(SSS3dConstants.TYPES[SSS3dConstants.MOON_TYPE]) ) { type = SSS3dConstants.MOON_TYPE; } else if ( nodeName.equals(SSS3dConstants.TYPES[SSS3dConstants.COMET_TYPE]) ) { type = SSS3dConstants.COMET_TYPE; } else if ( nodeName.equals(SSS3dConstants.TYPES[SSS3dConstants.SATELLITE_TYPE]) ) { type = SSS3dConstants.SATELLITE_TYPE; } else if ( nodeName.equals(SSS3dConstants.TYPES[SSS3dConstants.ROCKET_TYPE]) ) { type = SSS3dConstants.ROCKET_TYPE; } if (attribute != null) { data = new IniData(attribute.getNodeValue(), null,type, false, false, false, "red" ); } else { data = new IniData(null, null,type, false, false, false, "red" ); } NamedNodeMap nnm = child.getAttributes(); for (int j = XMLConstants.OBJECTNAME; j <= XMLConstants.COORDINATESYSTEM; j++) { Node node = nnm.getNamedItem(XMLConstants.treeElementNames[j]); if (node != null) { // get this value and set it correctly inside Integer n = (Integer)parameters.get( node.getNodeName() ); if (n != null) { switch ( n.intValue() ){ case XMLConstants.OBJECTNAME : data.setName(node.getNodeValue()); break; case XMLConstants.VISIBLE : data.setVisible((new Boolean(node.getNodeValue())).booleanValue()); break; case XMLConstants.ORBIT : data.setOrbit((new Boolean(node.getNodeValue())).booleanValue()); break; case XMLConstants.COLORORBIT : data.setColorOrbit(node.getNodeValue()); break; case XMLConstants.COORDINATESYSTEM : data.setCoordinateSystem((new Boolean(node.getNodeValue())).booleanValue()); break; default : break; } } } } Integer n = (Integer)parameters.get(nodeName); //System.out.println("switch : "+n.toString()); if (n != null) { switch ( n.intValue() ){ case XMLConstants.STAR : iniObject.setParameter(data, XMLConstants.STAR); break; case XMLConstants.PLANET : iniObject.setParameter(data, XMLConstants.PLANET); break; case XMLConstants.MOON : iniObject.setParameter(data, XMLConstants.MOON); break; case XMLConstants.COMET : iniObject.setParameter(data, XMLConstants.COMET); break; case XMLConstants.SATELLITE : iniObject.setParameter(data, XMLConstants.SATELLITE); break; case XMLConstants.ROCKET : iniObject.setParameter(data, XMLConstants.ROCKET); break; default : break; } } } } } } } } /** * Returns a string representation of a given node type. * * @param node the node * @returns String a string representing this node type */ private String nodeType(Node node) { int type = node.getNodeType(); String str = ""; switch ( type ) { case XMLConstants.ATTR_TYPE : str = "attribute_node"; break; case XMLConstants.CDATA_TYPE : str = "cdata_section_node"; break; case XMLConstants.COMMENT_TYPE : str = "comment_node"; break; case XMLConstants.DOCFRAG_TYPE : str = "document_fragment_node"; break; case XMLConstants.DOCUMENT_TYPE : str = "document_node"; break; case XMLConstants.DOCTYPE_TYPE : str = "document_type_node"; break; case XMLConstants.ELEMENT_TYPE : str = "element_node"; break; case XMLConstants.ENTITY_TYPE : str = "entity_node"; break; case XMLConstants.ENTITYREF_TYPE : str = "entity_reference_node"; break; case XMLConstants.NOTATION_TYPE : str = "notation_node"; break; case XMLConstants.PROCINSTR_TYPE : str = "processsing_instruction_node"; break; case XMLConstants.TEXT_TYPE : str = "text_node"; break; default : break; } return str; } /** * Method parses an XML file. Depending on the parameters and * their values it stores the information in the CelestialObjectInfo. * * @exception IOExecption throws an IOException in case of a read error */ private void parseCelestialObjectFile() throws IOException { // get current document from CelestialObjectInfo Document document = cObjInfo.getDocument(); Hashtable parameters = new Hashtable(); // initialize hashtable for (int i = XMLConstants.CELESTIALOBJECT_NAMES_MIN; i <= XMLConstants.CELESTIALOBJECT_NAMES_MAX; i++) { parameters.put(XMLConstants.treeElementNames[i], new Integer(i)); } if ( document != null ) { // iterate over each possible element tag // defined in class XMLConstants for(int tag = 0; tag < XMLConstants.treeElementNames.length; tag++ ) { // get node of specific tag // show only leaf nodes String nodeName = XMLConstants.treeElementNames[tag]; if ( !nodeName.equals("celestialobject") && !nodeName.equals("general") && !nodeName.equals("parameter") ) { NodeList childNodes = document.getElementsByTagName(nodeName); // search for value of node == nodeName for(int i = 0; i < childNodes.getLength(); i++) { Node child = childNodes.item(i); NodeList nl = child.getChildNodes(); for(int j = 0; j < childNodes.getLength(); j++) { if ( nl.item(j).getNodeType() == XMLConstants.TEXT_TYPE ) { // get this value and set it correctly inside // CelestialObjectInfo..... Integer n = (Integer)parameters.get( child.getNodeName() ); String value = nl.item(j).getNodeValue(); /*System.out.println("Parameter = "+child.getNodeName()+ " Value = "+nl.item(j).getNodeValue()); */ if (n != null) { switch ( n.intValue() ){ case 0 : // celestialobject case 1 : // general case 2 : break; // parameter case 3 : // type cObjInfo.setType( value ); break; case 4 : // name cObjInfo.setName( value ); break; case 5 : // name cObjInfo.setParentName( value ); break; case 6 : // scalingfactor cObjInfo.setScalingFactor( (new Double( value )).doubleValue() ); break; case 7 : // diameter cObjInfo.setDiameter( (new Double( value )).doubleValue() ); break; case 8 : // mindistancefromsun cObjInfo.setMinDistanceFromSun( (new Double( value )).doubleValue() ); break; case 9 : // maxdistancefromsun cObjInfo.setMaxDistanceFromSun( (new Double( value )).doubleValue() ); break; case 10 : // nbrofplanetpositions cObjInfo.setNbrOfPositions( (new Integer( value )).intValue() ); break; case 11 : // rotationperiod cObjInfo.setRotationPeriod( (new Double( value )).doubleValue() ); break; case 12 : // orbitperiod cObjInfo.setOrbitPeriod( (new Double( value )).doubleValue() ); break; case 13 : // meanorbitvelocity cObjInfo.setMeanOrbitVelocity( (new Double( value )).doubleValue() ); break; case 14 : // orbiteccentricity cObjInfo.setOrbitEccentricity( (new Double( value )).doubleValue() ); break; case 15 : // orbitinclinationtoecliptic cObjInfo.setOrbitInclinationToEcliptic( (new Double( value )).doubleValue() ); break; case 16 : // inclinationofequatortoorbit cObjInfo.setInclinationOfEquatorToOrbit( (new Double( value )).doubleValue() ); break; case 17 : // volume cObjInfo.setVolume( (new Double( value )).doubleValue() ); break; case 18 : // distance cObjInfo.setDistance( (new Double( value )).doubleValue() ); break; case 19 : // mass cObjInfo.setMass( (new Double( value )).doubleValue() ); break; case 20 : // density cObjInfo.setDensity( (new Double( value )).doubleValue() ); break; case 21 : // surfacegravity cObjInfo.setSurfaceGravity( (new Double( value )).doubleValue() ); break; case 22 : // escapevelocity cObjInfo.setEscapeVelocity( (new Double( value )).doubleValue() ); break; case 23 : // meantempatsolidsurface cObjInfo.setTempAtSolidSurface( (new Double( value )).doubleValue() ); break; case 24 : // majoratmosphericconstitutents cObjInfo.setAtmosphericConstitutents( value ); break; case 25 : // epoch cObjInfo.setEpoch( (new Double( value )).doubleValue() ); break; case 26 : // equinox cObjInfo.setEquinox( (new Double( value )).doubleValue() ); break; case 27 : // longitudenode cObjInfo.setLongitudeNode( (new Double( value )).doubleValue() ); break; case 28 : // perihelion cObjInfo.setPerihelion( (new Double( value )).doubleValue() ); break; default : break; } } } } } } } } } /** * Method opens the XML file and calls the private method parse() to * parse the XML Document. * * @param type the type of the xml file */ public void read(int type) { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); try { DocumentBuilder builder = factory.newDocumentBuilder(); if ( type == XMLConstants.XML_CELESTIALOBJECT ) { System.out.println(path); File file = new File(path); if ( file != null ) { cObjInfo.setDocument( builder.parse( file ) ); parseCelestialObjectFile(); } } else if ( type == XMLConstants.XML_INITIALIZATION ) { //System.out.println("XML_INITIALIZATION "+path+" "+XMLConstants.DOCUMENT); iniObject.setParameter( builder.parse( new File(path)), XMLConstants.DOCUMENT ); parseInitializationFile(); } } catch (SAXParseException spe) { // Error generated by the parser System.out.println ("\n** Parsing error" + ", line " + spe.getLineNumber () + ", uri " + spe.getSystemId ()); System.out.println(" " + spe.getMessage() ); // Use the contained exception, if any Exception x = spe; if (spe.getException() != null) x = spe.getException(); x.printStackTrace(); } catch (SAXException sxe) { // Error generated by this application // (or a parser-initialization error) Exception x = sxe; if (sxe.getException() != null) x = sxe.getException(); x.printStackTrace(); } catch (ParserConfigurationException pce) { // Parser with specified options can't be built pce.printStackTrace(); } catch (IOException ioe) { // I/O error ioe.printStackTrace(); } } // end function read() }// end class XMLParser