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1: /* java.beans.SimpleBeanInfo 2: Copyright (C) 1998 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package java.beans; 40: 41: import java.awt.Image; 42: import java.awt.Toolkit; 43: 44: /** 45: ** SimpleBeanInfo is a class you may extend to more easily 46: ** provide select information to the Introspector. It 47: ** implements all of the methods in BeanInfo by returning 48: ** null and forces the Introspector to behave exactly as 49: ** if there were no BeanInfo class at all (Introspecting 50: ** everything).<P> 51: ** 52: ** Overriding one or two of these functions 53: ** to give explicit information on only those things you 54: ** wish to give explicit information is perfectly safe, 55: ** and even desirable.<P> 56: ** 57: ** See the BeanInfo class for information on what the 58: ** various methods actually do. 59: ** 60: ** @author John Keiser 61: ** @since JDK1.1 62: ** @version 1.1.0, 29 Jul 1998 63: ** @see java.beans.BeanInfo 64: **/ 65: 66: public class SimpleBeanInfo implements BeanInfo { 67: /** Force Introspection of the general bean info. 68: ** @return <CODE>null</CODE>. 69: **/ 70: public BeanDescriptor getBeanDescriptor() { 71: return null; 72: } 73: 74: /** Force Introspection of the events this Bean type 75: ** fires. 76: ** @return <CODE>null</CODE> 77: **/ 78: public EventSetDescriptor[] getEventSetDescriptors() { 79: return null; 80: } 81: 82: /** Say that there is no "default" event set. 83: ** @return <CODE>-1</CODE>. 84: **/ 85: public int getDefaultEventIndex() { 86: return -1; 87: } 88: 89: /** Force Introspection of the Bean properties. 90: ** @return <CODE>null</CODE>. 91: **/ 92: public PropertyDescriptor[] getPropertyDescriptors() { 93: return null; 94: } 95: 96: /** Say that there is no "default" property. 97: ** @return <CODE>-1</CODE>. 98: **/ 99: public int getDefaultPropertyIndex() { 100: return -1; 101: } 102: 103: /** Force Introspection of the Bean's methods. 104: ** @return <CODE>null</CODE>. 105: **/ 106: public MethodDescriptor[] getMethodDescriptors() { 107: return null; 108: } 109: 110: /** Tell the Introspector to go look for other BeanInfo 111: ** itself. 112: ** @return <CODE>null</CODE>. 113: **/ 114: public BeanInfo[] getAdditionalBeanInfo() { 115: return null; 116: } 117: 118: /** Say that this Bean has no icons. 119: ** @param iconType the type of icon 120: ** @return <CODE>null</CODE>. 121: **/ 122: public Image getIcon(int iconType) { 123: return null; 124: } 125: 126: /** Helper method to load an image using the Bean class 127: ** getResource() method on the BeanInfo class (using 128: ** getClass(), since you'll extend this class to get 129: ** the BeanInfo). Basically it's assumed that the Bean 130: ** and its BeanInfo are both loaded by the same 131: ** ClassLoader, generally a reasonable assumption. 132: ** @param location the URL relative 133: ** @return the Image in question. 134: **/ 135: public Image loadImage(String location) { 136: return Toolkit.getDefaultToolkit().getImage(getClass().getResource(location)); 137: } 138: }
GNU Classpath (0.20) |