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1 package com.opensymphony.webwork.views.freemarker.tags;
2
3 import com.opensymphony.webwork.components.Component;
4 import freemarker.template.TemplateModelException;
5 import freemarker.template.TemplateTransformModel;
6 import freemarker.template.TransformControl;
7
8 import java.io.IOException  ;
9 import java.io.StringWriter ;
10 import java.io.Writer ;
11 import java.util.Map ;
12
13
18 public class ParamModel implements TemplateTransformModel {
19 public Writer getWriter(Writer writer, Map map) throws TemplateModelException, IOException {
20 String name = map.get("name").toString();
21 String value = null;
22 if (map.containsKey("value")) {
23 value = map.get("value").toString();
24 }
25
26 if (writer instanceof CallbackWriter) {
27 CallbackWriter cw = (CallbackWriter) writer;
28 Component bean = cw.getBean();
29 return new ParamWriter(bean, name, value);
30 } else {
31 throw new RuntimeException ("Param tag not used inside of valid element");
32 }
33 }
34
35 public static class ParamWriter extends Writer implements TransformControl {
36 StringWriter writer = new StringWriter ();
37
38 Component bean;
39 String name;
40 String value;
41
42 public ParamWriter(Component bean, String name, String value) {
43 this.bean = bean;
44 this.name = name;
45 this.value = value;
46 }
47
48 public void write(char cbuf[], int off, int len) throws IOException {
49 writer.write(cbuf, off, len);
50 }
51
52 public void flush() throws IOException {
53 writer.flush();
54 }
55
56 public void close() throws IOException {
57 writer.close();
58 }
59
60 public int onStart() throws TemplateModelException, IOException {
61 return EVALUATE_BODY;
62 }
63
64 public int afterBody() throws TemplateModelException, IOException {
65 if (value != null) {
66 bean.addParameter(name, value);
67 } else {
68 bean.addParameter(name, writer.toString());
69 }
70
71 return END_EVALUATION;
72 }
73
74 public void onError(Throwable throwable) throws Throwable {
75 throw throwable;
76 }
77 }
78 }
79 |
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