7195106: REGRESSION : There is no way to get Icon inf, once Softreference is released

Reviewed-by: rupashka

src/share/classes/java/beans/Introspector.java

@@ -1460,7 +1460,7 @@ class GenericBeanInfo extends SimpleBeanInfo {
     private PropertyDescriptor[] properties;
     private int defaultProperty;
     private MethodDescriptor[] methods;
-    private final Reference<BeanInfo> targetBeanInfoRef;
+    private Reference<BeanInfo> targetBeanInfoRef;
 
     public GenericBeanInfo(BeanDescriptor beanDescriptor,
                 EventSetDescriptor[] events, int defaultEvent,
@@ -1472,7 +1472,9 @@ class GenericBeanInfo extends SimpleBeanInfo {
         this.properties = properties;
         this.defaultProperty = defaultProperty;
         this.methods = methods;
-        this.targetBeanInfoRef = new SoftReference<>(targetBeanInfo);
+        this.targetBeanInfoRef = (targetBeanInfo != null)
+                ? new SoftReference<>(targetBeanInfo)
+                : null;
     }
 
     /**
@@ -1539,10 +1541,25 @@ class GenericBeanInfo extends SimpleBeanInfo {
     }
 
     public java.awt.Image getIcon(int iconKind) {
-        BeanInfo targetBeanInfo = this.targetBeanInfoRef.get();
+        BeanInfo targetBeanInfo = getTargetBeanInfo();
         if (targetBeanInfo != null) {
             return targetBeanInfo.getIcon(iconKind);
         }
         return super.getIcon(iconKind);
     }
+
+    private BeanInfo getTargetBeanInfo() {
+        if (this.targetBeanInfoRef == null) {
+            return null;
+        }
+        BeanInfo targetBeanInfo = this.targetBeanInfoRef.get();
+        if (targetBeanInfo == null) {
+            targetBeanInfo = ThreadGroupContext.getContext().getBeanInfoFinder()
+                    .find(this.beanDescriptor.getBeanClass());
+            if (targetBeanInfo != null) {
+                this.targetBeanInfoRef = new SoftReference<>(targetBeanInfo);
+            }
+        }
+        return targetBeanInfo;
+    }
 }

test/java/beans/Introspector/6380849/TestBeanInfo.java

@@ -38,8 +38,7 @@ import infos.ThirdBeanBeanInfo;
 
 import java.beans.BeanInfo;
 import java.beans.Introspector;
-import java.lang.ref.Reference;
-import java.lang.reflect.Field;
+import java.lang.reflect.Method;
 
 public class TestBeanInfo implements Runnable {
 
@@ -60,10 +59,9 @@ public class TestBeanInfo implements Runnable {
         try {
             actual = Introspector.getBeanInfo(type);
             type = actual.getClass();
-            Field field = type.getDeclaredField("targetBeanInfoRef"); // NON-NLS: field name
-            field.setAccessible(true);
-            Reference ref = (Reference) field.get(actual);
-            actual = (BeanInfo) ref.get();
+            Method method = type.getDeclaredMethod("getTargetBeanInfo"); // NON-NLS: method name
+            method.setAccessible(true);
+            actual = (BeanInfo) method.invoke(actual);
         }
         catch (Exception exception) {
             throw new Error("unexpected error", exception);

test/java/beans/Introspector/Test7195106.java

+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 7195106
+ * @summary Tests that explicit BeanInfo is not collected
+ * @author Sergey Malenkov
+ */
+
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.beans.BeanInfo;
+import java.beans.Introspector;
+import java.beans.SimpleBeanInfo;
+
+public class Test7195106 {
+
+    public static void main(String[] arg) throws Exception {
+        BeanInfo info = Introspector.getBeanInfo(My.class);
+        if (null == info.getIcon(BeanInfo.ICON_COLOR_16x16)) {
+            throw new Error("Unexpected behavior");
+        }
+        try {
+            int[] array = new int[1024];
+            while (true) {
+                array = new int[array.length << 1];
+            }
+        }
+        catch (OutOfMemoryError error) {
+            System.gc();
+        }
+        if (null == info.getIcon(BeanInfo.ICON_COLOR_16x16)) {
+            throw new Error("Explicit BeanInfo is collected");
+        }
+    }
+
+    public static class My {
+    }
+
+    public static class MyBeanInfo extends SimpleBeanInfo {
+        @Override
+        public Image getIcon(int type) {
+            return new BufferedImage(16, 16, BufferedImage.TYPE_INT_RGB);
+        }
+    }
+}