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  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
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  23 
  24 /*
  25  * @test
  26  * @key headful
  27  * @bug 6938813
  28  * @summary Swing mutable statics
  29  * @author Pavel Porvatov
  30  */
  31 
  32 import sun.awt.AppContext;
  33 import sun.awt.SunToolkit;
  34 
  35 import javax.swing.text.html.HTMLEditorKit;
  36 import javax.swing.text.html.StyleSheet;
  37 import javax.swing.text.html.parser.DTD;
  38 import javax.swing.text.html.parser.ParserDelegator;
  39 import java.lang.reflect.Field;
  40 
  41 public class bug6938813 {
  42     public static final String DTD_KEY = "dtd_key";
  43 
  44     private static volatile StyleSheet styleSheet;
  45 
  46     public static void main(String[] args) throws Exception {
  47         // Run validation and init values for this AppContext
  48         validate();
  49 
  50         Thread thread = new ThreadInAnotherAppContext();
  51 
  52         thread.start();
  53         thread.join();
  54     }
  55 
  56     private static void validate() throws Exception {
  57         AppContext appContext = AppContext.getAppContext();
  58 
  59         assertTrue(DTD.getDTD(DTD_KEY).getName().equals(DTD_KEY), "DTD.getDTD() mixed AppContexts");
  60 
  61         // Spoil hash value
  62         DTD invalidDtd = DTD.getDTD("invalid DTD");
  63 
  64         DTD.putDTDHash(DTD_KEY, invalidDtd);
  65 
  66         assertTrue(DTD.getDTD(DTD_KEY) == invalidDtd, "Something wrong with DTD.getDTD()");
  67 
  68         Object dtdKey = getParserDelegator_DTD_KEY();
  69 
  70         assertTrue(appContext.get(dtdKey) == null, "ParserDelegator mixed AppContexts");
  71 
  72         // Init default DTD
  73         new ParserDelegator();
  74 
  75         Object dtdValue = appContext.get(dtdKey);
  76 
  77         assertTrue(dtdValue != null, "ParserDelegator.defaultDTD isn't initialized");
  78 
  79         // Try reinit default DTD
  80         new ParserDelegator();
  81 
  82         assertTrue(dtdValue == appContext.get(dtdKey), "ParserDelegator.defaultDTD created a duplicate");
  83 
  84         HTMLEditorKit htmlEditorKit = new HTMLEditorKit();
  85 
  86         if (styleSheet == null) {
  87             // First AppContext
  88             styleSheet = htmlEditorKit.getStyleSheet();
  89 
  90             assertTrue(styleSheet != null, "htmlEditorKit.getStyleSheet() returns null");
  91             assertTrue(htmlEditorKit.getStyleSheet() == styleSheet, "Something wrong with htmlEditorKit.getStyleSheet()");
  92         } else {
  93             assertTrue(htmlEditorKit.getStyleSheet() != styleSheet, "HtmlEditorKit.getStyleSheet() mixed AppContexts");
  94         }
  95     }
  96 
  97     private static void assertTrue(boolean b, String msg) {
  98         if (!b) {
  99             throw new RuntimeException("Test failed: " + msg);
 100         }
 101     }
 102 
 103     private static Object getParserDelegator_DTD_KEY() throws Exception {
 104         Field field = ParserDelegator.class.getDeclaredField("DTD_KEY");
 105 
 106         field.setAccessible(true);
 107 
 108         return field.get(null);
 109     }
 110 
 111     private static class ThreadInAnotherAppContext extends Thread {
 112         public ThreadInAnotherAppContext() {
 113             super(new ThreadGroup("6938813"), "ThreadInAnotherAppContext");
 114         }
 115 
 116         public void run() {
 117             SunToolkit.createNewAppContext();
 118 
 119             try {
 120                 validate();
 121             } catch (Exception e) {
 122                 throw new RuntimeException(e);
 123             }
 124         }
 125     }
 126 }