1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 package org.apache.myfaces.view.facelets.tag.ui;
21
22 import java.io.IOException;
23 import java.util.Collection;
24 import java.util.HashMap;
25 import java.util.Map;
26 import java.util.logging.Level;
27 import java.util.logging.Logger;
28 import javax.el.ELException;
29 import javax.el.VariableMapper;
30 import javax.faces.FacesException;
31 import javax.faces.component.UIComponent;
32 import javax.faces.view.facelets.FaceletContext;
33 import javax.faces.view.facelets.FaceletException;
34 import javax.faces.view.facelets.TagAttribute;
35 import javax.faces.view.facelets.TagConfig;
36 import javax.faces.view.facelets.TagHandler;
37 import org.apache.myfaces.view.facelets.AbstractFaceletContext;
38 import org.apache.myfaces.view.facelets.TemplateClient;
39 import org.apache.myfaces.view.facelets.el.VariableMapperWrapper;
40 import org.apache.myfaces.view.facelets.tag.TagHandlerUtils;
41
42
43
44
45
46
47
48
49
50
51
52 public final class LegacyCompositionHandler extends TagHandler implements TemplateClient
53 {
54
55
56 private static final Logger log = Logger.getLogger(CompositionHandler.class.getName());
57
58 public final static String NAME = "composition";
59
60
61
62
63
64
65
66
67
68 protected final TagAttribute _template;
69
70 protected final Map<String, DefineHandler> _handlers;
71
72 protected final LegacyParamHandler[] _params;
73
74
75
76
77 public LegacyCompositionHandler(TagConfig config)
78 {
79 super(config);
80 _template = getAttribute("template");
81 if (_template != null)
82 {
83 _handlers = new HashMap<String, DefineHandler>();
84 for (DefineHandler handler : TagHandlerUtils.findNextByType(nextHandler, DefineHandler.class))
85 {
86 _handlers.put(handler.getName(), handler);
87 if (log.isLoggable(Level.FINE))
88 {
89 log.fine(tag + " found Define[" + handler.getName() + "]");
90 }
91 }
92
93 Collection<LegacyParamHandler> params = TagHandlerUtils.findNextByType(nextHandler,
94 LegacyParamHandler.class);
95 if (!params.isEmpty())
96 {
97 int i = 0;
98 _params = new LegacyParamHandler[params.size()];
99 for (LegacyParamHandler handler : params)
100 {
101 _params[i++] = handler;
102 }
103 }
104 else
105 {
106 _params = null;
107 }
108 }
109 else
110 {
111 _params = null;
112 _handlers = null;
113 }
114 }
115
116
117
118
119
120
121
122 public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,
123 ELException
124 {
125 if (_template != null)
126 {
127 VariableMapper orig = ctx.getVariableMapper();
128 AbstractFaceletContext actx = (AbstractFaceletContext) ctx;
129 actx.extendClient(this);
130 if (_params != null)
131 {
132 VariableMapper vm = new VariableMapperWrapper(orig);
133 ctx.setVariableMapper(vm);
134 for (int i = 0; i < _params.length; i++)
135 {
136 _params[i].apply(ctx, parent);
137 }
138 }
139
140 try
141 {
142 ctx.includeFacelet(parent, _template.getValue(ctx));
143 }
144 finally
145 {
146 actx.popExtendedClient(this);
147 ctx.setVariableMapper(orig);
148 }
149 }
150 else
151 {
152 this.nextHandler.apply(ctx, parent);
153 }
154 }
155
156 public boolean apply(FaceletContext ctx, UIComponent parent, String name) throws IOException, FacesException,
157 FaceletException, ELException
158 {
159 if (name != null)
160 {
161 if (_handlers == null)
162 {
163 return false;
164 }
165
166 DefineHandler handler = _handlers.get(name);
167 if (handler != null)
168 {
169 handler.applyDefinition(ctx, parent);
170 return true;
171 }
172 else
173 {
174 return false;
175 }
176 }
177 else
178 {
179 this.nextHandler.apply(ctx, parent);
180 return true;
181 }
182 }
183
184 }