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

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