110 lines
3.8 KiB
Java
110 lines
3.8 KiB
Java
/*
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* Copyright (c) 1996, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.beans;
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import java.lang.ref.Reference;
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/**
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* A BeanDescriptor provides global information about a "bean",
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* including its Java class, its displayName, etc.
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* <p>
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* This is one of the kinds of descriptor returned by a BeanInfo object,
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* which also returns descriptors for properties, method, and events.
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*/
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public class BeanDescriptor extends FeatureDescriptor {
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private Reference<? extends Class<?>> beanClassRef;
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private Reference<? extends Class<?>> customizerClassRef;
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/**
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* Create a BeanDescriptor for a bean that doesn't have a customizer.
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*
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* @param beanClass The Class object of the Java class that implements
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* the bean. For example sun.beans.OurButton.class.
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*/
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public BeanDescriptor(Class<?> beanClass) {
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this(beanClass, null);
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}
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/**
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* Create a BeanDescriptor for a bean that has a customizer.
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*
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* @param beanClass The Class object of the Java class that implements
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* the bean. For example sun.beans.OurButton.class.
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* @param customizerClass The Class object of the Java class that implements
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* the bean's Customizer. For example sun.beans.OurButtonCustomizer.class.
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*/
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public BeanDescriptor(Class<?> beanClass, Class<?> customizerClass) {
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this.beanClassRef = getWeakReference(beanClass);
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this.customizerClassRef = getWeakReference(customizerClass);
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String name = beanClass.getName();
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while (name.indexOf('.') >= 0) {
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name = name.substring(name.indexOf('.')+1);
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}
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setName(name);
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}
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/**
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* Gets the bean's Class object.
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*
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* @return The Class object for the bean.
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*/
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public Class<?> getBeanClass() {
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return (this.beanClassRef != null)
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? this.beanClassRef.get()
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: null;
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}
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/**
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* Gets the Class object for the bean's customizer.
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*
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* @return The Class object for the bean's customizer. This may
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* be null if the bean doesn't have a customizer.
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*/
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public Class<?> getCustomizerClass() {
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return (this.customizerClassRef != null)
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? this.customizerClassRef.get()
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: null;
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}
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/*
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* Package-private dup constructor
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* This must isolate the new object from any changes to the old object.
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*/
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BeanDescriptor(BeanDescriptor old) {
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super(old);
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beanClassRef = old.beanClassRef;
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customizerClassRef = old.customizerClassRef;
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}
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void appendTo(StringBuilder sb) {
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appendTo(sb, "beanClass", this.beanClassRef);
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appendTo(sb, "customizerClass", this.customizerClassRef);
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}
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}
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