bundles/org.simantics.db.impl/src/org/simantics/db/impl/GraphPrinter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.impl;
  13
  14 import java.io.DataOutput;
  15 import java.io.DataOutputStream;
  16 import java.io.FileNotFoundException;
  17 import java.io.FileOutputStream;
  18 import java.io.IOException;
  19
  20 public class GraphPrinter {
  21
  22     public static String LOG_FILE = "d:\\graph.dot";
  23
  24     public static boolean LOG = true;
  25
  26     static Object loggerCreationLock = new Object();
  27     static GraphPrinter logger = null;
  28
  29     DataOutput log;
  30
  31     public GraphPrinter() {
  32         if(LOG) {
  33             try {
  34                 FileOutputStream stream = new FileOutputStream(LOG_FILE);
  35                 log = new DataOutputStream(stream);
  36             } catch (FileNotFoundException e) {
  37                 e.printStackTrace();
  38             }
  39         }
  40     }
  41
  42     public static GraphPrinter getInstance() {
  43         if(logger == null) {
  44             synchronized (loggerCreationLock) {
  45                 if(logger == null)
  46                     logger = new GraphPrinter();
  47             }
  48         }
  49         return logger;
  50     }
  51
  52     public void begin(String filename) {
  53         if(LOG) {
  54             try {
  55                 FileOutputStream stream = new FileOutputStream(LOG_FILE);
  56                 log = new DataOutputStream(stream);
  57                 try {
  58                     synchronized(log) {
  59                         log.writeBytes("digraph test {\n");
  60                     }
  61                 } catch(IOException e) {
  62                     e.printStackTrace();
  63                 }
  64             } catch (FileNotFoundException e) {
  65                 e.printStackTrace();
  66             }
  67         }
  68     }
  69
  70     public void finish() {
  71         if(LOG) {
  72             try {
  73                 synchronized(log) {
  74                     log.writeBytes("}\n");
  75                 }
  76             } catch(IOException e) {
  77                 e.printStackTrace();
  78             }
  79             log = null;
  80         }
  81     }
  82
  83     private String escape(String input) {
  84         return input.replace("[", "_").replace("]", "_").replace(":", "_").replace("/", "_").replace("@", "_").replace(".", "_").replace(" ", "_").replace("#", "_").replace("-", "_");
  85     }
  86
  87     public void log(String start, String end) {
  88
  89         try {
  90             synchronized(log) {
  91                 log.writeBytes(escape(start.toString()));
  92                 log.writeBytes(" -> ");
  93                 log.writeBytes(escape(end.toString()));
  94                 log.writeBytes("\n");
  95             }
  96         } catch(IOException e) {
  97             e.printStackTrace();
  98         }
  99
 100     }
 101
 102 }