mirror of git://gcc.gnu.org/git/gcc.git
182 lines
7.5 KiB
Java
182 lines
7.5 KiB
Java
/* java.beans.BeanInfo
|
|
Copyright (C) 1998 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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 for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package java.beans;
|
|
|
|
/**
|
|
** BeanInfo can be implemented in order to provide explicit information to the Introspector.
|
|
**
|
|
** When you write a BeanInfo class, you implement this interface
|
|
** and provide explicit information by returning a non-null
|
|
** value from the appropriate method. If you wish the
|
|
** Introspector to determine certain information in the normal
|
|
** way, just return null (or in the case of int methods, return
|
|
** -1). There is a class called SimpleBeanInfo which returns
|
|
** null from all methods, which you may extend and only
|
|
** override the methods you wish to override.<P>
|
|
**
|
|
** When you have written the class, give it the name
|
|
** <CODE><Bean Class Name>BeanInfo</CODE> and place it in
|
|
** the same package as the Bean, or in the bean info search path
|
|
** (see Introspector for information on search paths).<P>
|
|
**
|
|
** A simple note about the way the Introspector interacts with
|
|
** BeanInfo. Introspectors look at a Bean class and determine
|
|
** if there is a BeanInfo class with it. If there is not a
|
|
** BeanInfo class, it will behave as if the BeanInfo class
|
|
** provided was a SimpleBeanInfo class (i.e. it will determine
|
|
** all information automatically).<P>If there is a BeanInfo
|
|
** class, then any methods that do *not* return null are
|
|
** regarded as providing definitive information about the class
|
|
** and all of its superclasses for those information types.
|
|
** Even if a parent BeanInfo class explicitly returns that
|
|
** information, it will not be used.
|
|
**
|
|
** @author John Keiser
|
|
** @since JDK1.1
|
|
** @version 1.1.0, 28 Jul 1998
|
|
**/
|
|
|
|
public interface BeanInfo {
|
|
/** Use this as a parameter for the getIcon() command to retrieve a certain type of icon. **/
|
|
int ICON_COLOR_16x16 = 1;
|
|
/** Use this as a parameter for the getIcon() command to retrieve a certain type of icon. **/
|
|
int ICON_COLOR_32x32 = 2;
|
|
/** Use this as a parameter for the getIcon() command to retrieve a certain type of icon. **/
|
|
int ICON_MONO_16x16 = 3;
|
|
/** Use this as a parameter for the getIcon() command to retrieve a certain type of icon. **/
|
|
int ICON_MONO_32x32 = 4;
|
|
|
|
/** Get the general description of this Bean type.
|
|
** @return the BeanDescriptor for the Bean, or null if
|
|
** the BeanDescriptor should be obtained by
|
|
** Introspection.
|
|
**/
|
|
BeanDescriptor getBeanDescriptor();
|
|
|
|
/** Get the events this Bean type fires.
|
|
** @return the EventDescriptors representing events this
|
|
** Bean fires. Returns <CODE>null</CODE> if the
|
|
** events are to be acquired by Introspection.
|
|
**/
|
|
EventSetDescriptor[] getEventSetDescriptors();
|
|
|
|
/** Get the "default" event, basically the one a RAD tool
|
|
** user is most likely to select.
|
|
** @return the index into the getEventSetDescriptors()
|
|
** that the user is most likely to use. Returns
|
|
** <CODE>-1</CODE> if there is no default event.
|
|
**/
|
|
int getDefaultEventIndex();
|
|
|
|
/** Get the properties (get/set method pairs) this Bean
|
|
** type supports.
|
|
** @return the PropertyDescriptors representing the
|
|
** properties this Bean type supports.
|
|
** Returns <CODE>null</CODE> if the properties
|
|
** are to be obtained by Introspection.
|
|
**/
|
|
PropertyDescriptor[] getPropertyDescriptors();
|
|
|
|
/** Get the "default" property, basically the one a RAD
|
|
** tool user is most likely to select.
|
|
** @return the index into the getPropertyDescriptors()
|
|
** that the user is most likely to use. Returns
|
|
** <CODE>-1</CODE> if there is no default event.
|
|
**/
|
|
int getDefaultPropertyIndex();
|
|
|
|
/** Get the methods this Bean type supports.
|
|
** @return the MethodDescriptors representing the
|
|
** methods this Bean type supports. Returns
|
|
** <CODE>null</CODE> if the methods are to be
|
|
** obtained by Introspection.
|
|
**/
|
|
MethodDescriptor[] getMethodDescriptors();
|
|
|
|
/** Get additional BeanInfos representing this Bean.
|
|
** In this version of JavaBeans, this method is used so
|
|
** that space and time can be saved by reading a BeanInfo
|
|
** for each class in the hierarchy (super, super(super),
|
|
** and so on).<P>
|
|
**
|
|
** The order of precedence when two pieces of BeanInfo
|
|
** conflict (such as two PropertyDescriptors that have
|
|
** the same name), in order from highest precedence to
|
|
** lowest, is:
|
|
** <OL>
|
|
** <LI>This BeanInfo object.</LI>
|
|
** <LI><CODE>getAdditionalBeanInfo()[getAdditionalBeanInfo().length]</CODE></LI>
|
|
** <LI> ... </LI>
|
|
** <LI><CODE>getAdditionalBeanInfo()[1]</CODE></LI>
|
|
** <LI><CODE>getAdditionalBeanInfo()[0]</CODE></LI>
|
|
** </OL><P>
|
|
**
|
|
** <STRONG>Spec Note:</STRONG> It is possible that
|
|
** returning <CODE>null</CODE> from this method could
|
|
** stop Introspection in its tracks, but it is unclear
|
|
** from the spec whether this is the case.
|
|
**
|
|
** @return additional BeanInfos representing this Bean.
|
|
** <CODE>null</CODE> may be returned (see Spec
|
|
** Note, above).
|
|
**/
|
|
BeanInfo[] getAdditionalBeanInfo();
|
|
|
|
/** Get a visual icon for this Bean.
|
|
** A Bean does not have to support icons, and if it does
|
|
** support icons, it does not have to support every single
|
|
** type. Sun recommends that if you only support one
|
|
** type, you support 16x16 color. Sun also notes that you
|
|
** should try to use a type (like GIF) that allows for
|
|
** transparent pixels, so that the background of the RAD
|
|
** tool can show through.<P>
|
|
**
|
|
** <STRONG>Spec Note:</STRONG> If you do not support the
|
|
** type of icon that is being asked for, but you do
|
|
** support another type, it is unclear whether you should
|
|
** return the other type or not. I would presume not.
|
|
**
|
|
** @param iconType the type of icon to get (see the
|
|
** ICON_* constants in this class).
|
|
** @return the icon, or null if that type of icon is
|
|
** unsupported by this Bean.
|
|
**/
|
|
java.awt.Image getIcon(int iconType);
|
|
}
|