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1
14
15 package com.sun.facelets.tag.ui;
16
17 import java.io.IOException  ;
18 import java.util.ArrayList ;
19 import java.util.HashMap ;
20 import java.util.Iterator ;
21 import java.util.List ;
22 import java.util.Map ;
23 import java.util.logging.Level ;
24 import java.util.logging.Logger ;
25
26 import javax.el.ELException;
27 import javax.el.VariableMapper;
28 import javax.faces.FacesException;
29 import javax.faces.component.UIComponent;
30
31 import com.sun.facelets.FaceletContext;
32 import com.sun.facelets.FaceletException;
33 import com.sun.facelets.FaceletHandler;
34 import com.sun.facelets.TemplateClient;
35 import com.sun.facelets.el.VariableMapperWrapper;
36 import com.sun.facelets.tag.TagAttribute;
37 import com.sun.facelets.tag.TagConfig;
38 import com.sun.facelets.tag.TagHandler;
39
40
44 public final class DecorateHandler extends TagHandler implements TemplateClient {
45
46 private final Logger log = Logger.getLogger("facelets.tag.ui.decorate");
47
48 private final TagAttribute template;
49
50 private final Map handlers;
51
52 private final ParamHandler[] params;
53
54
57 public DecorateHandler(TagConfig config) {
58 super(config);
59 this.template = this.getRequiredAttribute("template");
60 this.handlers = new HashMap ();
61
62 Iterator itr = this.findNextByType(DefineHandler.class);
63 DefineHandler d = null;
64 while (itr.hasNext()) {
65 d = (DefineHandler) itr.next();
66 this.handlers.put(d.getName(), d);
67 if (log.isLoggable(Level.FINE)) {
68 log.fine(tag + " found Define[" + d.getName() + "]");
69 }
70 }
71 List paramC = new ArrayList ();
72 itr = this.findNextByType(ParamHandler.class);
73 while (itr.hasNext()) {
74 paramC.add(itr.next());
75 }
76 if (paramC.size() > 0) {
77 this.params = new ParamHandler[paramC.size()];
78 for (int i = 0; i < this.params.length; i++) {
79 this.params[i] = (ParamHandler) paramC.get(i);
80 }
81 } else {
82 this.params = null;
83 }
84 }
85
86
92 public void apply(FaceletContext ctx, UIComponent parent)
93 throws IOException , FacesException, FaceletException, ELException {
94 VariableMapper orig = ctx.getVariableMapper();
95 if (this.params != null) {
96 VariableMapper vm = new VariableMapperWrapper(orig);
97 ctx.setVariableMapper(vm);
98 for (int i = 0; i < this.params.length; i++) {
99 this.params[i].apply(ctx, parent);
100 }
101 }
102
103 ctx.extendClient(this);
104 try {
105 ctx.includeFacelet(parent, this.template.getValue(ctx));
106 } finally {
107 ctx.setVariableMapper(orig);
108 ctx.popClient(this);
109 }
110 }
111
112 public boolean apply(FaceletContext ctx, UIComponent parent, String name) throws IOException , FacesException, FaceletException, ELException {
113 if (name != null) {
114 FaceletHandler handler = (FaceletHandler) this.handlers.get(name);
115 if (handler != null) {
116 handler.apply(ctx, parent);
117 return true;
118 } else {
119 return false;
120 }
121 } else {
122 this.nextHandler.apply(ctx, parent);
123 return false;
124 }
125 }
126 }
127 |
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