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1 package org.sapia.gumby.tags;
2
3 import java.lang.reflect.Constructor  ;
4 import java.util.ArrayList ;
5 import java.util.List ;
6
7 import org.sapia.gumby.RenderContext;
8 import org.sapia.gumby.factory.ContextAware;
9 import org.sapia.gumby.tags.support.Arg;
10 import org.sapia.util.xml.confix.ConfigurationException;
11 import org.sapia.util.xml.confix.ObjectCreationCallback;
12 import org.sapia.util.xml.confix.ObjectWrapperIF;
13
14
29 public class New implements ContextAware, ObjectCreationCallback,
30 ObjectWrapperIF {
31
32 private Class _class;
33 private List _args = new ArrayList ();
34 private Object _created;
35 private RenderContext _context;
36
37 public void setClass(String name) throws Exception {
38 _class = _context.getSettings().resolveClass(name);
39 if(_class == null) {
40 throw new ClassNotFoundException (name);
41 }
42 }
43
44 public Arg createArg() {
45 Arg arg = new Arg();
46 _args.add(arg);
47 return arg;
48 }
49
50
53 public void handleContext(RenderContext context) {
54 _context = context;
55 }
56
57
60 public Object getWrappedObject() {
61 try {
62 return onCreate();
63 } catch(ConfigurationException e) {
64 throw new RuntimeException ("Could not instantiate object", e);
65 }
66 }
67
68
71 public Object onCreate() throws ConfigurationException {
72 if(_created == null) {
73 if(_class == null) {
74 throw new ConfigurationException("'class' not specified");
75 }
76 Class [] types = new Class [_args.size()];
77 Object [] params = new Object [_args.size()];
78 Arg arg;
79 for(int i = 0; i < _args.size(); i++) {
80 arg = (Arg) _args.get(i);
81 types[i] = arg.getType();
82 params[i] = arg.getValue();
83 }
84 try {
85 Constructor cons = _class.getConstructor(types);
86 _created = cons.newInstance(params);
87 } catch(Exception e) {
88 e.printStackTrace();
89 throw new ConfigurationException("Could not instantiate object from: "
90 + _class);
91 }
92
93 }
94 return _created;
95 }
96
97 }
98 |
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