/* |
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* Copyright (c) 1996, 2012, 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.awt.Image; |
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/** |
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* Use the {@code BeanInfo} interface |
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* to create a {@code BeanInfo} class |
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* and provide explicit information about the methods, |
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* properties, events, and other features of your beans. |
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* <p> |
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* When developing your bean, you can implement |
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* the bean features required for your application task |
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* omitting the rest of the {@code BeanInfo} features. |
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* They will be obtained through the automatic analysis |
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* by using the low-level reflection of the bean methods |
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* and applying standard design patterns. |
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* You have an opportunity to provide additional bean information |
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* through various descriptor classes. |
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* <p> |
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* See the {@link SimpleBeanInfo} class that is |
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* a convenient basic class for {@code BeanInfo} classes. |
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* You can override the methods and properties of |
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* the {@code SimpleBeanInfo} class to define specific information. |
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* <p> |
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* See also the {@link Introspector} class to learn more about bean behavior. |
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*/ |
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public interface BeanInfo { |
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/** |
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* Returns the bean descriptor |
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* that provides overall information about the bean, |
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* such as its display name or its customizer. |
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* |
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* @return a {@link BeanDescriptor} object, |
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* or {@code null} if the information is to |
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* be obtained through the automatic analysis |
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*/ |
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BeanDescriptor getBeanDescriptor(); |
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/** |
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* Returns the event descriptors of the bean |
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* that define the types of events fired by this bean. |
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* |
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* @return an array of {@link EventSetDescriptor} objects, |
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* or {@code null} if the information is to |
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* be obtained through the automatic analysis |
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*/ |
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EventSetDescriptor[] getEventSetDescriptors(); |
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/** |
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* A bean may have a default event typically applied when this bean is used. |
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* |
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* @return index of the default event in the {@code EventSetDescriptor} array |
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* returned by the {@code getEventSetDescriptors} method, |
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* or -1 if there is no default event |
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*/ |
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int getDefaultEventIndex(); |
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/** |
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* Returns descriptors for all properties of the bean. |
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* <p> |
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* If a property is indexed, then its entry in the result array |
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* belongs to the {@link IndexedPropertyDescriptor} subclass |
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* of the {@link PropertyDescriptor} class. |
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* A client of the {@code getPropertyDescriptors} method |
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* can use the {@code instanceof} operator to check |
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* whether a given {@code PropertyDescriptor} |
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* is an {@code IndexedPropertyDescriptor}. |
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* |
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* @return an array of {@code PropertyDescriptor} objects, |
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* or {@code null} if the information is to |
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* be obtained through the automatic analysis |
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*/ |
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PropertyDescriptor[] getPropertyDescriptors(); |
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/** |
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* A bean may have a default property commonly updated when this bean is customized. |
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* |
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* @return index of the default property in the {@code PropertyDescriptor} array |
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* returned by the {@code getPropertyDescriptors} method, |
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* or -1 if there is no default property |
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*/ |
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int getDefaultPropertyIndex(); |
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/** |
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* Returns the method descriptors of the bean |
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* that define the externally visible methods supported by this bean. |
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* |
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* @return an array of {@link MethodDescriptor} objects, |
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* or {@code null} if the information is to |
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* be obtained through the automatic analysis |
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*/ |
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MethodDescriptor[] getMethodDescriptors(); |
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/** |
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* This method enables the current {@code BeanInfo} object |
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* to return an arbitrary collection of other {@code BeanInfo} objects |
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* that provide additional information about the current bean. |
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* <p> |
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* If there are conflicts or overlaps between the information |
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* provided by different {@code BeanInfo} objects, |
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* the current {@code BeanInfo} object takes priority |
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* over the additional {@code BeanInfo} objects. |
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* Array elements with higher indices take priority |
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* over the elements with lower indices. |
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* |
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* @return an array of {@code BeanInfo} objects, |
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* or {@code null} if there are no additional {@code BeanInfo} objects |
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*/ |
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BeanInfo[] getAdditionalBeanInfo(); |
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/** |
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* Returns an image that can be used to represent the bean in toolboxes or toolbars. |
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* <p> |
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* There are four possible types of icons: |
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* 16 x 16 color, 32 x 32 color, 16 x 16 mono, and 32 x 32 mono. |
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* If you implement a bean so that it supports a single icon, |
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* it is recommended to use 16 x 16 color. |
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* Another recommendation is to set a transparent background for the icons. |
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* |
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* @param iconKind the kind of icon requested |
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* @return an image object representing the requested icon, |
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* or {@code null} if no suitable icon is available |
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* |
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* @see #ICON_COLOR_16x16 |
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* @see #ICON_COLOR_32x32 |
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* @see #ICON_MONO_16x16 |
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* @see #ICON_MONO_32x32 |
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*/ |
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Image getIcon(int iconKind); |
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/** |
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* Constant to indicate a 16 x 16 color icon. |
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*/ |
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final static int ICON_COLOR_16x16 = 1; |
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/** |
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* Constant to indicate a 32 x 32 color icon. |
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*/ |
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final static int ICON_COLOR_32x32 = 2; |
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/** |
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* Constant to indicate a 16 x 16 monochrome icon. |
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*/ |
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final static int ICON_MONO_16x16 = 3; |
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/** |
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* Constant to indicate a 32 x 32 monochrome icon. |
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*/ |
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final static int ICON_MONO_32x32 = 4; |
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} |