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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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  20  * or visit www.oracle.com if you need additional information or have any
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  23 
  24 /*
  25  * @test
  26  * @bug 6938813
  27  * @summary Swing mutable statics
  28  * @author Pavel Porvatov
  29  * @modules java.desktop/javax.swing.text.html.parser:open
  30  * @modules java.desktop/sun.awt
  31  */
  32 
  33 import sun.awt.AppContext;
  34 import sun.awt.SunToolkit;
  35 
  36 import javax.swing.text.html.HTMLEditorKit;
  37 import javax.swing.text.html.StyleSheet;
  38 import javax.swing.text.html.parser.DTD;
  39 import javax.swing.text.html.parser.ParserDelegator;
  40 import java.lang.reflect.Field;
  41 
  42 public class bug6938813 {
  43     public static final String DTD_KEY = "dtd_key";
  44 
  45     private static volatile StyleSheet styleSheet;
  46 
  47     public static void main(String[] args) throws Exception {
  48         // Run validation and init values for this AppContext
  49         validate();
  50 
  51         Thread thread = new ThreadInAnotherAppContext();
  52 
  53         thread.start();
  54         thread.join();
  55     }
  56 
  57     private static void validate() throws Exception {
  58         AppContext appContext = AppContext.getAppContext();
  59 
  60         assertTrue(DTD.getDTD(DTD_KEY).getName().equals(DTD_KEY), "DTD.getDTD() mixed AppContexts");
  61 
  62         // Spoil hash value
  63         DTD invalidDtd = DTD.getDTD("invalid DTD");
  64 
  65         DTD.putDTDHash(DTD_KEY, invalidDtd);
  66 
  67         assertTrue(DTD.getDTD(DTD_KEY) == invalidDtd, "Something wrong with DTD.getDTD()");
  68 
  69         Object dtdKey = getParserDelegator_DTD_KEY();
  70 
  71         assertTrue(appContext.get(dtdKey) == null, "ParserDelegator mixed AppContexts");
  72 
  73         // Init default DTD
  74         new ParserDelegator();
  75 
  76         Object dtdValue = appContext.get(dtdKey);
  77 
  78         assertTrue(dtdValue != null, "ParserDelegator.defaultDTD isn't initialized");
  79 
  80         // Try reinit default DTD
  81         new ParserDelegator();
  82 
  83         assertTrue(dtdValue == appContext.get(dtdKey), "ParserDelegator.defaultDTD created a duplicate");
  84 
  85         HTMLEditorKit htmlEditorKit = new HTMLEditorKit();
  86 
  87         if (styleSheet == null) {
  88             // First AppContext
  89             styleSheet = htmlEditorKit.getStyleSheet();
  90 
  91             assertTrue(styleSheet != null, "htmlEditorKit.getStyleSheet() returns null");
  92             assertTrue(htmlEditorKit.getStyleSheet() == styleSheet, "Something wrong with htmlEditorKit.getStyleSheet()");
  93         } else {
  94             assertTrue(htmlEditorKit.getStyleSheet() != styleSheet, "HtmlEditorKit.getStyleSheet() mixed AppContexts");
  95         }
  96     }
  97 
  98     private static void assertTrue(boolean b, String msg) {
  99         if (!b) {
 100             throw new RuntimeException("Test failed: " + msg);
 101         }
 102     }
 103 
 104     private static Object getParserDelegator_DTD_KEY() throws Exception {
 105         Field field = ParserDelegator.class.getDeclaredField("DTD_KEY");
 106 
 107         field.setAccessible(true);
 108 
 109         return field.get(null);
 110     }
 111 
 112     private static class ThreadInAnotherAppContext extends Thread {
 113         public ThreadInAnotherAppContext() {
 114             super(new ThreadGroup("6938813"), "ThreadInAnotherAppContext");
 115         }
 116 
 117         public void run() {
 118             SunToolkit.createNewAppContext();
 119 
 120             try {
 121                 validate();
 122             } catch (Exception e) {
 123                 throw new RuntimeException(e);
 124             }
 125         }
 126     }
 127 }