source: trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/LogPreprocessor.java @ 23

package de.ugoe.cs.eventbench;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

import org.apache.commons.codec.binary.Base64;

import de.ugoe.cs.util.StringTools;
import de.ugoe.cs.util.console.Console;

public class LogPreprocessor {
        
        private boolean sessionOpen = false;
        private boolean msgIncomplete = false;
        
        private boolean base64;
        
        public LogPreprocessor() {
                this(false);
        }
        
        public LogPreprocessor(boolean base64) {
                this.base64 = base64;
        }
        
        public void convertToXml(String source, String target) throws IOException, FileNotFoundException {
                FileWriter targetFile = new FileWriter(target);
                targetFile.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + StringTools.ENDLINE);
                targetFile.write("<log>" + StringTools.ENDLINE);
                processFile(source, targetFile);
                if( sessionOpen ) {
                        targetFile.write(" </session>" + StringTools.ENDLINE);
                }
                targetFile.write("</log>");
                targetFile.close();
        }
        
        
        public void convertDirToXml(String path, String target) throws IOException, FileNotFoundException {
                FileWriter targetFile = new FileWriter(target);
                targetFile.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + StringTools.ENDLINE);
                targetFile.write("<log>" + StringTools.ENDLINE);
                File folder = new File(path);
                if( !folder.isDirectory() ) {
                        throw new IOException(path + " is not a directory");
                }
                String absolutPath = folder.getAbsolutePath();
                for( String filename : folder.list() ) {
                        String source = absolutPath + "/" + filename;
                        Console.traceln("Processing file: " + source);
                        processFile(source, targetFile);
                }
                
                if( sessionOpen ) {
                        targetFile.write(" </session>" + StringTools.ENDLINE);
                }
                targetFile.write("</log>");
                targetFile.close();
        }

        private void processFile(String source, FileWriter targetFile)
                        throws FileNotFoundException, IOException {
                File f = new File(source);
                FileReader reader = new FileReader(f);
                char[] buffer = new char[(int) f.length()];
                reader.read(buffer);
                reader.close();
                String[] lines = (new String(buffer)).split("\n");
                String incompleteLine = "";
                // Open source and read line by line
                for( String currentLine : lines ) {
                        if( currentLine.contains("UL: <session>")) {
                                if( sessionOpen) {
                                        targetFile.write(" </session>" + StringTools.ENDLINE);
                                        targetFile.write(" <session>" + StringTools.ENDLINE);
                                } else {
                                        targetFile.write(" <session>" + StringTools.ENDLINE);
                                        sessionOpen = true;
                                }
                        } else if( currentLine.contains("UL: </session>")) {
                                if( sessionOpen) {
                                        targetFile.write(" </session>" + StringTools.ENDLINE);
                                        sessionOpen = false;
                                }
                        } else if( msgIncomplete || currentLine.contains("UL: ")) {
                                
                                String currentContent;
                                String actualLine;
                                if( msgIncomplete ) {
                                        actualLine = currentLine;
                                } else {
                                        String[] splitResult = currentLine.split("UL: ");
                                        actualLine = splitResult[1];
                                }
                                if( base64 ) {
                                        Base64 decoder = new Base64();
                                        byte[] decoded = decoder.decode(actualLine);
                                        currentContent = new String(decoded, "UTF-16LE");
                                        currentContent = currentContent.substring(0, currentContent.length()-1);
                                } else {
                                        currentContent = actualLine;
                                }
                                if( msgIncomplete ) {
                                        incompleteLine += currentContent;
                                        if( incompleteLine.contains("</msg>") ) {
                                                msgIncomplete = false;
                                                targetFile.write(incompleteLine + StringTools.ENDLINE);
                                                incompleteLine = "";
                                        }
                                } else {
                                        if( currentContent.contains("<msg") && sessionOpen ) {
                                                if( currentContent.contains("</msg>") ) {
                                                        targetFile.write("  " + currentContent + StringTools.ENDLINE);
                                                } else {
                                                        msgIncomplete = true;
                                                        incompleteLine += currentContent;
                                                }
                                        }
                                }
                        }
                }
        }

}