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1
48
49 package com.caucho.hessian.io;
50
51 import java.io.IOException  ;
52 import java.lang.reflect.Method ;
53 import java.lang.reflect.Modifier ;
54 import java.util.ArrayList ;
55
56
59 public class BeanSerializer extends AbstractSerializer {
60 private Method []_methods;
61 private String []_names;
62
63 private Method _writeReplace;
64
65 public BeanSerializer(Class cl)
66 {
67 _writeReplace = getWriteReplace(cl);
68
69 ArrayList primitiveMethods = new ArrayList ();
70 ArrayList compoundMethods = new ArrayList ();
71
72 for (; cl != null; cl = cl.getSuperclass()) {
73 Method []methods = cl.getDeclaredMethods();
74
75 for (int i = 0; i < methods.length; i++) {
76 Method method = methods[i];
77
78 if (Modifier.isStatic(method.getModifiers()))
79 continue;
80
81 if (method.getParameterTypes().length != 0)
82 continue;
83
84 String name = method.getName();
85
86 if (! name.startsWith("get"))
87 continue;
88
89 Class type = method.getReturnType();
90
91 if (type.equals(void.class))
92 continue;
93
94 if (findSetter(methods, name, type) == null)
95 continue;
96
97 method.setAccessible(true);
99
100 if (type.isPrimitive() ||
101 type.getName().startsWith("java.lang.") &&
102 ! type.equals(Object .class))
103 primitiveMethods.add(method);
104 else
105 compoundMethods.add(method);
106 }
107 }
108
109 ArrayList methodList = new ArrayList ();
110 methodList.addAll(primitiveMethods);
111 methodList.addAll(compoundMethods);
112
113 _methods = new Method [methodList.size()];
114 methodList.toArray(_methods);
115
116 _names = new String [_methods.length];
117
118 for (int i = 0; i < _methods.length; i++) {
119 String name = _methods[i].getName();
120
121 name = name.substring(3);
122
123 int j = 0;
124 for (; j < name.length() && Character.isUpperCase(name.charAt(j)); j++) {
125 }
126
127 if (j == 1)
128 name = name.substring(0, j).toLowerCase() + name.substring(j);
129 else if (j > 1)
130 name = name.substring(0, j - 1).toLowerCase() + name.substring(j - 1);
131
132 _names[i] = name;
133 }
134 }
135
136
139 protected Method getWriteReplace(Class cl)
140 {
141 for (; cl != null; cl = cl.getSuperclass()) {
142 Method []methods = cl.getDeclaredMethods();
143
144 for (int i = 0; i < methods.length; i++) {
145 Method method = methods[i];
146
147 if (method.getName().equals("writeReplace") &&
148 method.getParameterTypes().length == 0)
149 return method;
150 }
151 }
152
153 return null;
154 }
155
156 public void writeObject(Object obj, AbstractHessianOutput out)
157 throws IOException
158 {
159 if (out.addRef(obj))
160 return;
161
162 Class cl = obj.getClass();
163
164 try {
165 if (_writeReplace != null) {
166 Object repl = _writeReplace.invoke(obj, new Object [0]);
167
168 out.removeRef(obj);
169
170 out.writeObject(repl);
171
172 out.replaceRef(repl, obj);
173
174 return;
175 }
176 } catch (Exception e) {
177 }
178
179 int ref = out.writeObjectBegin(cl.getName());
180
181 if (ref < 0) {
182
184 for (int i = 0; i < _methods.length; i++) {
185 Method method = _methods[i];
186 Object value = null;
187
188 try {
189 value = _methods[i].invoke(obj, (Object []) null);
190 } catch (Throwable e) {
191 }
193
194 out.writeString(_names[i]);
195
196 out.writeObject(value);
197 }
198
199 out.writeMapEnd();
200 }
201 else {
202 if (ref == 0) {
203 out.writeInt(_names.length);
204
205 for (int i = 0; i < _names.length; i++)
206 out.writeString(_names[i]);
207 }
208
209 for (int i = 0; i < _methods.length; i++) {
210 Method method = _methods[i];
211 Object value = null;
212
213 try {
214 value = _methods[i].invoke(obj, (Object []) null);
215 } catch (Throwable e) {
216 }
218
219 out.writeObject(value);
220 }
221 }
222 }
223
224
227 private Method findSetter(Method []methods, String getterName, Class arg)
228 {
229 String setterName = "set" + getterName.substring(3);
230
231 for (int i = 0; i < methods.length; i++) {
232 Method method = methods[i];
233
234 if (! method.getName().equals(setterName))
235 continue;
236
237 if (! method.getReturnType().equals(void.class))
238 continue;
239
240 Class []params = method.getParameterTypes();
241
242 if (params.length == 1 && params[0].equals(arg))
243 return method;
244 }
245
246 return null;
247 }
248 }
249 |
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