libjava/gnu/java/beans/BeanInfoEmbryo.java

   1 /* gnu.java.beans.BeanInfoEmbryo
   2    Copyright (C) 1998, 2002 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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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 gnu.java.beans;
  40
  41 import java.beans.BeanDescriptor;
  42 import java.beans.BeanInfo;
  43 import java.beans.EventSetDescriptor;
  44 import java.beans.IndexedPropertyDescriptor;
  45 import java.beans.MethodDescriptor;
  46 import java.beans.PropertyDescriptor;
  47 import java.lang.reflect.Method;
  48 import java.util.Arrays;
  49 import java.util.Enumeration;
  50 import java.util.Hashtable;
  51 import java.util.Iterator;
  52 import java.util.Map;
  53 import java.util.TreeMap;
  54 import java.util.Vector;
  55
  56 /**
  57  ** A BeanInfoEmbryo accumulates information about a Bean
  58  ** while it is in the process of being created, and then
  59  ** when you are done accumulating the information, the
  60  ** getBeanInfo() method may be called to create a BeanInfo
  61  ** object based on the information.<P>
  62  **
  63  ** This class is not well-synchronized.  (It can be, it
  64  ** just isn't yet.)
  65  **
  66  ** @author John Keiser
  67  ** @version 1.1.0, 30 Jul 1998
  68  ** @see java.beans.BeanInfo
  69  **/
  70
  71 public class BeanInfoEmbryo {
  72
  73         // by using a TreeMap the properties will be sorted alphabetically by name
  74         // which matches the (undocumented) behavior of jdk
  75         TreeMap properties = new TreeMap();
  76         Hashtable events = new Hashtable();
  77         Vector methods = new Vector();
  78
  79         BeanDescriptor beanDescriptor;
  80         BeanInfo[] additionalBeanInfo;
  81         java.awt.Image[] im;
  82         String defaultPropertyName;
  83         String defaultEventName;
  84
  85         public BeanInfoEmbryo() {
  86         }
  87
  88         public BeanInfo getBeanInfo() {
  89                 int defaultProperty = -1;
  90                 int defaultEvent = -1;
  91
  92                 PropertyDescriptor[] Aproperties = new PropertyDescriptor[properties.size()];
  93                 int i = 0;
  94                 Iterator it = properties.entrySet().iterator();
  95                 while (it.hasNext()) {
  96                         Aproperties[i] = (PropertyDescriptor) (((Map.Entry)it.next()).getValue());
  97                         if(defaultPropertyName != null && Aproperties[i].getName().equals(defaultPropertyName)) {
  98                                 defaultProperty = i;
  99                         }
 100                         i++;
 101                 }
 102
 103                 EventSetDescriptor[] Aevents = new EventSetDescriptor[events.size()];
 104                 i = 0;
 105                 Enumeration e = events.elements();
 106                 while (e.hasMoreElements()) {
 107                         Aevents[i] = (EventSetDescriptor) e.nextElement();
 108                         if(defaultEventName != null && Aevents[i].getName().equals(defaultEventName)) {
 109                                 defaultEvent = i;
 110                         }
 111                         i++;
 112                 }
 113
 114                 MethodDescriptor[] Amethods = new MethodDescriptor[methods.size()];
 115                 methods.copyInto(Amethods);
 116
 117                 return new ExplicitBeanInfo(beanDescriptor,additionalBeanInfo,Aproperties,defaultProperty,Aevents,defaultEvent,Amethods,im);
 118         }
 119
 120         public void setBeanDescriptor(BeanDescriptor b) {
 121                 beanDescriptor = b;
 122         }
 123
 124         public void setAdditionalBeanInfo(BeanInfo[] b) {
 125                 additionalBeanInfo = b;
 126         }
 127
 128         public boolean hasProperty(PropertyDescriptor p) {
 129                 return properties.get(p.getName()) != null;
 130         }
 131         public void addProperty(PropertyDescriptor p) {
 132                 properties.put(p.getName(),p);
 133         }
 134         public void addIndexedProperty(IndexedPropertyDescriptor p) {
 135                 properties.put(p.getName(),p);
 136         }
 137
 138         public boolean hasEvent(EventSetDescriptor e) {
 139                 return events.get(e.getName()) != null;
 140         }
 141         public void addEvent(EventSetDescriptor e) {
 142                 events.put(e.getName(),e);
 143         }
 144
 145         public boolean hasMethod(MethodDescriptor m) {
 146           for(int i=0;i<methods.size();i++) {
 147             Method thisMethod = ((MethodDescriptor)methods.elementAt(i)).getMethod();
 148             if(m.getMethod().getName().equals(thisMethod.getName())
 149                && Arrays.equals(m.getMethod().getParameterTypes(),
 150                                 thisMethod.getParameterTypes())) {
 151               return true;
 152             }
 153           }
 154           return false;
 155         }
 156         public void addMethod(MethodDescriptor m) {
 157                 methods.addElement(m);
 158         }
 159
 160         public void setDefaultPropertyName(String defaultPropertyName) {
 161                 this.defaultPropertyName = defaultPropertyName;
 162         }
 163
 164         public void setDefaultEventName(String defaultEventName) {
 165                 this.defaultEventName = defaultEventName;
 166         }
 167
 168         public void setIcons(java.awt.Image[] im) {
 169                 this.im = im;
 170         }
 171 }