source: trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/LogParser.java @ 20

package de.ugoe.cs.eventbench;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.security.InvalidParameterException;
import java.util.LinkedList;
import java.util.List;
import java.util.SortedMap;
import java.util.TreeMap;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;

import de.ugoe.cs.eventbench.data.Event;
import de.ugoe.cs.eventbench.data.WindowTree;
import de.ugoe.cs.eventbench.data.WindowsMessage;
import de.ugoe.cs.eventbench.messagehandler.HandlerCreate;
import de.ugoe.cs.eventbench.messagehandler.HandlerDestroy;
import de.ugoe.cs.eventbench.messagehandler.HandlerSetText;
import de.ugoe.cs.eventbench.messagehandler.MessageHandler;
import de.ugoe.cs.eventbench.windowsdefs.MessageDefs;
import de.ugoe.cs.util.StringTools;
import de.ugoe.cs.util.console.Console;

public class LogParser extends DefaultHandler {
        
        private MessageHandler currentHandler;
        
        private WindowsMessage currentMessage;
        
        private SequenceSplitter sequenceSplitter;
        
        private List<List<Event<WindowsMessage>>> sequences;
        
        private SortedMap<Integer, Integer> typeCounter;
        
        private boolean countMessageOccurences;
        
        public LogParser() {
                this(false);
        }
        
        public LogParser(boolean countMessageOccurences) {
                sequenceSplitter = new SequenceSplitter();
                sequences = new LinkedList<List<Event<WindowsMessage>>>();
                currentHandler = null;
                this.countMessageOccurences = countMessageOccurences;
                if( countMessageOccurences) {
                        typeCounter = new TreeMap<Integer, Integer>();
                }
                
        }
        
        public List<List<Event<WindowsMessage>>> getSequences() {
                return sequences;
        }
        
        @Override
        public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
                if( qName.equals("session") ) {
                        Console.traceln("start of session");
                        sequenceSplitter = new SequenceSplitter();
                }
                else if( qName.equals("msg") ) {
                        String msgType = atts.getValue("type");
                        int msgInt = -1;
                        try {
                                msgInt = Integer.parseInt(msgType);
                                
                                if( countMessageOccurences ) {
                                        Integer currentCount = typeCounter.get(msgInt);
                                        if( currentCount==null ) {
                                                typeCounter.put(msgInt, 1);
                                        } else {
                                                typeCounter.put(msgInt, currentCount+1);
                                        }
                                }
                                
                                if( msgInt==MessageDefs.WM_CREATE ) {
                                        currentHandler = new HandlerCreate();
                                        currentHandler.onStartElement();
                                }
                                else if( msgInt==MessageDefs.WM_DESTROY ) {
                                        currentHandler = new HandlerDestroy();
                                        currentHandler.onStartElement();
                                }
                                else if( msgInt==MessageDefs.WM_SETTEXT ) {
                                        currentHandler = new HandlerSetText();
                                        currentHandler.onStartElement();
                                } else {
                                        currentMessage = new WindowsMessage(msgInt);
                                }
                        } catch(NumberFormatException e) {
                                Console.printerrln("Invalid message type: type not a number");
                                e.printStackTrace();
                        }
                }
                else if( qName.equals("param") ) {
                        if( currentHandler!=null ) {
                                currentHandler.onParameter(atts.getValue("name"), atts.getValue("value"));
                        } else {
                                currentMessage.addParameter(atts.getValue("name"), atts.getValue("value"));
                        }
                }
        }
        
        @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
                if( qName.equals("msg") ) {
                        if( currentHandler!=null ) {
                                currentHandler.onEndElement();
                                currentHandler = null;
                        } else {
                                try {
                                        currentMessage.setTarget(WindowTree.getInstance());
                                        sequenceSplitter.addMessage(currentMessage);
                                } catch (InvalidParameterException e) {
                                        Console.traceln(e.getMessage() + " WindowsMessage " + currentMessage + " ignored.");
                                }                               
                        }
                }
                else if(qName.equals("session")) {
                        sequenceSplitter.endSession();
                        sequences.add(sequenceSplitter.getSequence());
                        Console.traceln("end of session");
                }
        }
        
        public void parseFile(String filename) {
                if( filename==null ) {
                        throw new InvalidParameterException("filename must not be null");
                }
                
                SAXParserFactory spf = SAXParserFactory.newInstance();
                spf.setValidating(true);
                
                SAXParser saxParser = null;
                InputSource inputSource = null;
                try {
                        saxParser = spf.newSAXParser();
                        inputSource = new InputSource(new FileReader(filename));
                } catch (ParserConfigurationException e) {
                        e.printStackTrace();
                } catch (SAXException e) {
                        e.printStackTrace();
                } catch (FileNotFoundException e) {
                        e.printStackTrace();
                }
                if( inputSource!=null ) {
                inputSource.setSystemId("file://" + new File(filename).getAbsolutePath());
                try {
                        if( saxParser==null) {
                                throw new RuntimeException("SAXParser creation failed");
                        }
                                saxParser.parse(inputSource, this);
                } catch (SAXParseException e) {
                        Console.printerrln("Failure parsing file in line " + e.getLineNumber() + ", column " + e.getColumnNumber() +".");
                        e.printStackTrace();
                        } catch (SAXException e) {
                                e.printStackTrace();
                        } catch (IOException e) {
                                e.printStackTrace();
                        }
                }
                if( countMessageOccurences ) {
                        Console.println("Message statistics:");
                        Console.println(typeCounter.toString().replace(" ", StringTools.ENDLINE).replaceAll("[\\{\\}]",""));
                }
        }
}