ClassDescriptor


1   package org.kohsuke.stapler;
2   
3   import java.lang.reflect.Field  ;
4   import java.lang.reflect.Method  ;
5   import java.lang.reflect.Modifier  ;
6   import java.util.ArrayList  ;
7   import java.util.List  ;
8   
9   /**
10   * Reflection information of a {@link Class}.
11   *
12   * @author Kohsuke Kawaguchi
13   */
14  final class ClassDescriptor {
15      public final Class   clazz;
16      public final FunctionList methods;
17      public final Field  [] fields;
18  
19      /**
20       * @param clazz
21       *      The class to build a descriptor around.
22       * @param wrappers
23       *      Optional wrapper duck-typing classes.
24       *      Static methods on this class that has the first parameter
25       *      as 'clazz' will be handled as if it's instance methods on
26       *      'clazz'. Useful for adding view/controller methods on
27       *      model classes.
28       */
29      public ClassDescriptor(Class   clazz, Class  ... wrappers) {
30          this.clazz = clazz;
31          this.fields = clazz.getFields();
32  
33          // instance methods
34          List  <Function> functions = new ArrayList  <Function>();
35          for (Method   m : clazz.getMethods()) {
36              functions.add(new Function.InstanceFunction(m).protectBy(m));
37          }
38          if(wrappers!=null) {
39              for (Class   w : wrappers) {
40                  for (Method   m : w.getMethods()) {
41                      if(!Modifier.isStatic(m.getModifiers()))
42                          continue;
43                      Class  <?>[] p = m.getParameterTypes();
44                      if(p.length==0)
45                          continue;
46                      if(p[0].isAssignableFrom(clazz))
47                          continue;
48                      functions.add(new Function.StaticFunction(m).protectBy(m));
49                  }
50              }
51          }
52          this.methods = new FunctionList(functions);
53      }
54  }
55
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