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1
52
53 package freemarker.ext.servlet;
54
55 import freemarker.template.*;
56 import java.util.*;
57 import javax.servlet.http.*;
58
59
64
65 public class HttpRequestParametersHashModel
66 implements
67 TemplateHashModelEx
68 {
69 private final HttpServletRequest request;
70 private List keys;
71
72 public HttpRequestParametersHashModel(HttpServletRequest request)
73 {
74 this.request = request;
75 }
76
77 public TemplateModel get(String  key)
78 {
79 String value = request.getParameter(key);
80 return value == null ? null : new SimpleScalar(value);
81 }
82
83 public boolean isEmpty()
84 {
85 return !request.getParameterNames().hasMoreElements();
86 }
87
88 public int size() {
89 return getKeys().size();
90 }
91
92 public TemplateCollectionModel keys() {
93 return new SimpleCollection(getKeys().iterator());
94 }
95
96 public TemplateCollectionModel values() {
97 final Iterator iter = getKeys().iterator();
98 return new SimpleCollection(
99 new Iterator() {
100 public boolean hasNext() {
101 return iter.hasNext();
102 }
103 public Object next() {
104 return request.getParameter((String )iter.next());
105 }
106 public void remove() {
107 throw new UnsupportedOperationException ();
108 }
109 });
110 }
111
112 protected String transcode(String string)
113 {
114 return string;
115 }
116
117 private synchronized List getKeys() {
118 if(keys == null) {
119 keys = new ArrayList();
120 for (Enumeration enumeration = request.getParameterNames(); enumeration.hasMoreElements();) {
121 keys.add(enumeration.nextElement());
122 }
123 }
124 return keys;
125 }
126 }
127 |
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