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1
5 package org.exoplatform.faces;
6
7 import java.util.* ;
8 import java.lang.reflect.* ;
9 import javax.faces.component.UIComponent ;
10 import javax.faces.context.FacesContext ;
11 import org.exoplatform.container.PortalContainer;
12 import org.exoplatform.container.SessionContainer;
13 import org.exoplatform.faces.context.*;
14 import org.exoplatform.faces.core.component.UIExoComponent;
15
21 public class UIComponentFactory {
22 private ResourceBundle res_ ;
23
24 public UIComponentFactory(ResourceBundle res) {
25 res_ = res ;
26 }
27
28 public UIComponentFactory() {
29 FacesContext context = FacesContext.getCurrentInstance() ;
30 PortletExternalContext econtext =
31 (PortletExternalContext) context.getExternalContext() ;
32 res_ = econtext.getApplicationResourceBundle() ;
33 }
34
35 final public Object  createUIComponent(String className) throws Exception {
36 ClassLoader cl = Thread.currentThread().getContextClassLoader() ;
37 Class clazz = cl.loadClass(className) ;
38 return createUIComponent(clazz) ;
39 }
40
41 final public Object createUIComponent(Class clazz) throws Exception {
42 PortalContainer manager = PortalContainer.getInstance() ;
43 return createUIComponent(clazz, manager) ;
44 }
45
46 private Object createUIComponent(Class clazz, PortalContainer manager) throws Exception {
47 Constructor constructor = findBiggestConstructor(clazz) ;
48 Class [] parameters = constructor.getParameterTypes() ;
49 Object [] args = new Object [parameters.length] ;
50 for (int i = 0; i < args.length; i++) {
51 if(UIComponent.class.isAssignableFrom(parameters[i])) {
52 args[i] = createUIComponent(parameters[i], manager) ;
53 } else if(ResourceBundle.class.isAssignableFrom(parameters[i])) {
54 args[i] = res_ ;
55 } else {
56 args[i] = manager.getComponentInstanceOfType(parameters[i]) ;
57 if (args[i] == null) {
58 throw new Exception ("Cannot find the service " + parameters[i].getName()) ;
59 }
60 }
61 }
62 Object result = constructor.newInstance(args) ;
63 return result ;
64 }
65
66 private Constructor findBiggestConstructor(Class clazz) {
67 Constructor bc = null ;
68 Constructor[] constructors = clazz.getConstructors() ;
69 for(int i = 0 ; i < constructors.length; i++) {
70 if(bc == null) {
71 bc = constructors[i] ;
72 } else if(bc.getParameterTypes().length < constructors[i].getParameterTypes().length) {
73 bc = constructors[i] ;
74 }
75 }
76 return bc ;
77 }
78
79 static public UIExoComponent createComponent(Class cl) throws Exception {
80 String className = cl.getName() ;
81 int idx = className.lastIndexOf('.') ;
82 className = className.substring(idx + 1, className.length()) ;
83 SessionContainer scontainer = SessionContainer.getInstance() ;
84 UIExoComponent uiComponent = (UIExoComponent)scontainer.createComponent(cl) ;
85 uiComponent.setId(className) ;
86 return uiComponent ;
87 }
88 }
89 |
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