jdk/src/java.desktop/share/classes/java/beans/BeanDescriptor.java
changeset 25859 3317bb8137f4
parent 25566 ba387c302edd
child 31166 6448eff013a8
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/share/classes/java/beans/BeanDescriptor.java	Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 1996, 2011, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+package java.beans;
+
+import java.lang.ref.Reference;
+import javax.swing.SwingContainer;
+
+/**
+ * A BeanDescriptor provides global information about a "bean",
+ * including its Java class, its displayName, etc.
+ * <p>
+ * This is one of the kinds of descriptor returned by a BeanInfo object,
+ * which also returns descriptors for properties, method, and events.
+ *
+ * @since 1.1
+ */
+
+public class BeanDescriptor extends FeatureDescriptor {
+
+    private Reference<? extends Class<?>> beanClassRef;
+    private Reference<? extends Class<?>> customizerClassRef;
+
+    /**
+     * Create a BeanDescriptor for a bean that doesn't have a customizer.
+     *
+     * @param beanClass  The Class object of the Java class that implements
+     *          the bean.  For example sun.beans.OurButton.class.
+     */
+    public BeanDescriptor(Class<?> beanClass) {
+        this(beanClass, null);
+    }
+
+    /**
+     * Create a BeanDescriptor for a bean that has a customizer.
+     *
+     * @param beanClass  The Class object of the Java class that implements
+     *          the bean.  For example sun.beans.OurButton.class.
+     * @param customizerClass  The Class object of the Java class that implements
+     *          the bean's Customizer.  For example sun.beans.OurButtonCustomizer.class.
+     */
+    public BeanDescriptor(Class<?> beanClass, Class<?> customizerClass) {
+        this.beanClassRef = getWeakReference(beanClass);
+        this.customizerClassRef = getWeakReference(customizerClass);
+
+        String name = beanClass.getName();
+        while (name.indexOf('.') >= 0) {
+            name = name.substring(name.indexOf('.')+1);
+        }
+        setName(name);
+
+        JavaBean annotation = beanClass.getAnnotation(JavaBean.class);
+        if (annotation != null) {
+            setPreferred(true);
+            String description = annotation.description();
+            if (!description.isEmpty()) {
+                setShortDescription(description);
+            }
+        }
+        SwingContainer container = beanClass.getAnnotation(SwingContainer.class);
+        if (container != null) {
+            setValue("isContainer", container.value());
+            String delegate = container.delegate();
+            if (!delegate.isEmpty()) {
+                setValue("containerDelegate", delegate);
+            }
+        }
+    }
+
+    /**
+     * Gets the bean's Class object.
+     *
+     * @return The Class object for the bean.
+     */
+    public Class<?> getBeanClass() {
+        return (this.beanClassRef != null)
+                ? this.beanClassRef.get()
+                : null;
+    }
+
+    /**
+     * Gets the Class object for the bean's customizer.
+     *
+     * @return The Class object for the bean's customizer.  This may
+     * be null if the bean doesn't have a customizer.
+     */
+    public Class<?> getCustomizerClass() {
+        return (this.customizerClassRef != null)
+                ? this.customizerClassRef.get()
+                : null;
+    }
+
+    /*
+     * Package-private dup constructor
+     * This must isolate the new object from any changes to the old object.
+     */
+    BeanDescriptor(BeanDescriptor old) {
+        super(old);
+        beanClassRef = old.beanClassRef;
+        customizerClassRef = old.customizerClassRef;
+    }
+
+    void appendTo(StringBuilder sb) {
+        appendTo(sb, "beanClass", this.beanClassRef);
+        appendTo(sb, "customizerClass", this.customizerClassRef);
+    }
+}