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Java > Open Source Codes > com > sun > facelets > compiler > TextInstruction


1 /**
2  * Licensed under the Common Development and Distribution License,
3  * you may not use this file except in compliance with the License.
4  * You may obtain a copy of the License at
5  *
6  * http://www.sun.com/cddl/
7  *
8  * Unless required by applicable law or agreed to in writing, software
9  * distributed under the License is distributed on an "AS IS" BASIS,
10  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
12  * permissions and limitations under the License.
13  */
14
15 package com.sun.facelets.compiler;
16
17
18 import java.io.IOException JavaDoc;
19 import java.util.List JavaDoc;
20
21 import javax.el.ELContext;
22 import javax.el.ELException;
23 import javax.el.ExpressionFactory;
24
25 import javax.faces.context.FacesContext;
26 import javax.faces.context.ResponseWriter;
27
28 import com.sun.facelets.el.ELAdaptor;
29 import com.sun.facelets.el.ELText;
30
31 final class TextInstruction implements Instruction {
32     private final ELText txt;
33     
34     private final String JavaDoc alias;
35
36     public TextInstruction(String JavaDoc alias, ELText txt) {
37         this.alias = alias;
38         this.txt = txt;
39     }
40
41     public void write(FacesContext context) throws IOException JavaDoc {
42         ResponseWriter out = context.getResponseWriter();
43         try {
44             ELContext elContext = ELAdaptor.getELContext(context);
45             txt.writeText(out, elContext);
46             //out.writeText(txt.toString(elContext), null);
47 } catch (ELException e) {
48             throw new ELException(this.alias + ": " + e.getMessage(), e.getCause());
49         } catch (Exception JavaDoc e) {
50             throw new ELException(this.alias + ": " + e.getMessage(), e);
51         }
52     }
53
54
55     public Instruction apply(ExpressionFactory factory, ELContext ctx) {
56         ELText nt = this.txt.apply(factory, ctx);
57         if (nt == this.txt) {
58             return this;
59         }
60
61         return new TextInstruction(alias, nt);
62     }
63
64     public boolean isLiteral() {
65         return txt.isLiteral();
66     }
67 }
68
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