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1
16 package org.apache.myfaces.context.servlet;
17
18 import java.util.ArrayList  ;
19 import java.util.Enumeration ;
20 import java.util.HashMap ;
21 import java.util.List ;
22 import java.util.Map ;
23
24 import javax.servlet.http.HttpServletRequest ;
25
26
27
33 public class RequestHeaderValuesMap extends AbstractAttributeMap
34 {
35 private final HttpServletRequest _httpServletRequest;
36 private final Map _valueCache = new HashMap ();
37
38 RequestHeaderValuesMap(HttpServletRequest httpServletRequest)
39 {
40 _httpServletRequest = httpServletRequest;
41 }
42
43 protected Object getAttribute(String key)
44 {
45 Object ret = _valueCache.get(key);
46 if (ret == null)
47 {
48 _valueCache.put(key, ret = toArray(_httpServletRequest
49 .getHeaders(key)));
50 }
51
52 return ret;
53 }
54
55 protected void setAttribute(String key, Object value)
56 {
57 throw new UnsupportedOperationException (
58 "Cannot set HttpServletRequest HeaderValues");
59 }
60
61 protected void removeAttribute(String key)
62 {
63 throw new UnsupportedOperationException (
64 "Cannot remove HttpServletRequest HeaderValues");
65 }
66
67 protected Enumeration getAttributeNames()
68 {
69 return _httpServletRequest.getHeaderNames();
70 }
71
72 private String [] toArray(Enumeration e)
73 {
74 List ret = new ArrayList ();
75
76 while (e.hasMoreElements())
77 {
78 ret.add(e.nextElement());
79 }
80
81 return (String []) ret.toArray(new String [ret.size()]);
82 }
83 } |
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