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1
22
23
24 package com.mchange.v2.naming;
25
26 import java.beans.*;
27 import java.util.*;
28 import javax.naming.*;
29 import com.mchange.v2.log.*;
30 import java.lang.reflect.Method  ;
31 import javax.naming.spi.ObjectFactory ;
32 import com.mchange.v2.beans.BeansUtils;
33 import com.mchange.v2.lang.Coerce;
34 import com.mchange.v2.ser.SerializableUtils;
35
36 public class JavaBeanObjectFactory implements ObjectFactory
37 {
38 private final static MLogger logger = MLog.getLogger( JavaBeanObjectFactory.class );
39
40 final static Object NULL_TOKEN = new Object ();
41
42 public Object getObjectInstance(Object refObj, Name name, Context nameCtx, Hashtable env)
43 throws Exception
44 {
45 if (refObj instanceof Reference)
46 {
47 Reference ref = (Reference) refObj;
48 Map refAddrsMap = new HashMap();
49 for (Enumeration e = ref.getAll(); e.hasMoreElements(); )
50 {
51 RefAddr addr = (RefAddr) e.nextElement();
52 refAddrsMap.put( addr.getType(), addr );
53 }
54 Class beanClass = Class.forName( ref.getClassName() );
55 Set refProps = null;
56 RefAddr refPropsRefAddr = (BinaryRefAddr) refAddrsMap.remove( JavaBeanReferenceMaker.REF_PROPS_KEY );
57 if ( refPropsRefAddr != null )
58 refProps = (Set) SerializableUtils.fromByteArray( (byte[]) refPropsRefAddr.getContent() );
59 Map propMap = createPropertyMap( beanClass, refAddrsMap );
60 return findBean( beanClass, propMap, refProps );
61 }
62 else
63 return null;
64 }
65
66 private Map createPropertyMap( Class beanClass, Map refAddrsMap ) throws Exception
67 {
68 BeanInfo bi = Introspector.getBeanInfo( beanClass );
69 PropertyDescriptor[] pds = bi.getPropertyDescriptors();
70
71 Map out = new HashMap();
72 for (int i = 0, len = pds.length; i < len; ++i)
73 {
74 PropertyDescriptor pd = pds[i];
75 String propertyName = pd.getName();
76 Class propertyType = pd.getPropertyType();
77 Object addr = refAddrsMap.remove( propertyName );
78 if (addr != null)
79 {
80 if ( addr instanceof StringRefAddr )
81 {
82 String content = (String ) ((StringRefAddr) addr).getContent();
83 if ( Coerce.canCoerce( propertyType ) )
84 out.put( propertyName, Coerce.toObject( content, propertyType ) );
85 else
86 {
87 PropertyEditor pe = BeansUtils.findPropertyEditor( pd );
88 pe.setAsText( content );
89 out.put( propertyName, pe.getValue() );
90 }
91 }
92 else if ( addr instanceof BinaryRefAddr )
93 {
94 byte[] content = (byte[]) ((BinaryRefAddr) addr).getContent();
95 if ( content.length == 0 )
96 out.put( propertyName, NULL_TOKEN ); else
98 out.put( propertyName, SerializableUtils.fromByteArray( content ) ); }
100 else
101 {
102 if (logger.isLoggable( MLevel.WARNING ))
103 logger.warning(this.getClass().getName() + " -- unknown RefAddr subclass: " + addr.getClass().getName());
104 }
105 }
106 }
107 for ( Iterator ii = refAddrsMap.keySet().iterator(); ii.hasNext(); )
108 {
109 String type = (String ) ii.next();
110 if (logger.isLoggable( MLevel.WARNING ))
111 logger.warning(this.getClass().getName() + " -- RefAddr for unknown property: " + type);
112 }
113 return out;
114 }
115
116 protected Object createBlankInstance(Class beanClass) throws Exception
117 { return beanClass.newInstance(); }
118
119 protected Object findBean(Class beanClass, Map propertyMap, Set refProps ) throws Exception
120 {
121 Object bean = createBlankInstance( beanClass );
122 BeanInfo bi = Introspector.getBeanInfo( bean.getClass() );
123 PropertyDescriptor[] pds = bi.getPropertyDescriptors();
124
125 for (int i = 0, len = pds.length; i < len; ++i)
126 {
127 PropertyDescriptor pd = pds[i];
128 String propertyName = pd.getName();
129 Object value = propertyMap.get( propertyName );
130 Method setter = pd.getWriteMethod();
131 if (value != null)
132 {
133 if (setter != null)
134 setter.invoke( bean, new Object [] { (value == NULL_TOKEN ? null : value) } );
135 else
136 {
137 if (logger.isLoggable( MLevel.WARNING ))
139 logger.warning(this.getClass().getName() + ": Could not restore read-only property '" + propertyName + "'.");
140 }
141 }
142 else
143 {
144 if (setter != null)
145 {
146 if (refProps == null || refProps.contains( propertyName ))
147 {
148 if (logger.isLoggable( MLevel.WARNING ))
151 logger.warning(this.getClass().getName() + " -- Expected writable property ''" + propertyName + "'' left at default value");
152 }
153 }
154 }
155 }
156
157 return bean;
158 }
159 }
160 |
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