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1
28
29 package com.caucho.jsp.java;
30
31 import com.caucho.config.types.Signature;
32 import com.caucho.jsp.JspParseException;
33 import com.caucho.jsp.cfg.TldAttribute;
34 import com.caucho.util.L10N;
35 import com.caucho.vfs.WriteStream;
36 import com.caucho.xml.QName;
37
38 import javax.servlet.jsp.tagext.JspFragment  ;
39 import java.io.IOException ;
40
41 public class JspDirectiveAttribute extends JspNode {
42 static L10N L = new L10N(JspDirectiveAttribute.class);
43
44 private static final QName NAME = new QName("name");
45 private static final QName REQUIRED = new QName("required");
46 private static final QName FRAGMENT = new QName("fragment");
47 private static final QName RTEXPRVALUE = new QName("rtexprvalue");
48 private static final QName TYPE = new QName("type");
49 private static final QName DESCRIPTION = new QName("description");
50 private static final QName DEFERRED_VALUE
51 = new QName("deferredValue");
52 private static final QName DEFERRED_VALUE_TYPE
53 = new QName("deferredValueType");
54 private static final QName DEFERRED_METHOD
55 = new QName("deferredMethod");
56 private static final QName DEFERRED_METHOD_SIGNATURE
57 = new QName("deferredMethodSignature");
58
59 private String _name;
60 private String _type;
61 private boolean _isRequired;
62 private boolean _isFragment;
63 private Boolean _isRtexprvalue;
64 private String _description;
65
66 private boolean _deferredValue;
67 private String _deferredValueType;
68 private boolean _deferredMethod;
69 private String _deferredMethodSignature;
70
71
77 public void addAttribute(QName name, String value)
78 throws JspParseException
79 {
80 if (! _gen.getParseState().isTag())
81 throw error(L.l("'{0}' is only allowed in .tag files. Attribute directives are not allowed in normal JSP files.",
82 getTagName()));
83
84 JavaTagGenerator gen = (JavaTagGenerator) _gen;
85
86 if (NAME.equals(name)) {
87 if (gen.findVariable(value) != null) {
88 throw error(L.l("@attribute name '{0}' is already used by a variable.",
89 value));
90 }
91 else if (gen.findAttribute(value) != null) {
92 throw error(L.l("@attribute name '{0}' is already used by another attribute.",
93 value));
94 }
95
96 _name = value;
97 }
98 else if (TYPE.equals(name))
99 _type = value;
100 else if (REQUIRED.equals(name))
101 _isRequired = attributeToBoolean(name.getName(), value);
102 else if (FRAGMENT.equals(name))
103 _isFragment = attributeToBoolean(name.getName(), value);
104 else if (RTEXPRVALUE.equals(name))
105 _isRtexprvalue = attributeToBoolean(name.getName(), value);
106 else if (DESCRIPTION.equals(name))
107 _description = value;
108 else if (DEFERRED_VALUE.equals(name)) {
109 _deferredValue = attributeToBoolean(name.getName(), value);
110 if (_deferredValue)
111 _type = "javax.el.ValueExpression";
112 }
113 else if (DEFERRED_VALUE_TYPE.equals(name)) {
114 _type = "javax.el.ValueExpression";
115 _deferredValueType = value;
116 }
117 else if (DEFERRED_METHOD.equals(name)) {
118 _deferredMethod = attributeToBoolean(name.getName(), value);
119 if (_deferredMethod)
120 _type = "javax.el.MethodExpression";
121 }
122 else if (DEFERRED_METHOD_SIGNATURE.equals(name)) {
123 try {
124 new Signature(value);
125 } catch (Exception e) {
126 throw error(e.getMessage());
127 }
128
129 _type = "javax.el.MethodExpression";
130 _deferredMethodSignature = value;
131 }
132 else {
133 throw error(L.l("'{0}' is an unknown JSP attribute directive attributes. The valid attributes are: deferredMethod, deferredMethodSignature, deferredValue, deferredValueType, description, fragment, name, rtexprvalue, type.",
134 name.getName()));
135 }
136 }
137
138
141 public void endElement()
142 throws JspParseException
143 {
144 if (! _gen.getParseState().isTag())
145 throw error(L.l("'{0}' is only allowed in .tag files. Attribute directives are not allowed in normal JSP files.",
146 getTagName()));
147
148 if (_name == null)
149 throw error(L.l("<{0}> needs a 'name' attribute.",
150 getTagName()));
151
152 JavaTagGenerator tagGen = (JavaTagGenerator) _gen;
153
154 TldAttribute attr = new TldAttribute();
155 attr.setName(_name);
156
157 if (_type != null) {
158 Class type = loadClass(_type);
159
160 if (type == null)
161 throw error(L.l("type '{0}' is an unknown class for tag attribute {1}.",
162 _type, _name));
163
164 if (type.isPrimitive())
165 throw error(L.l("attribute type '{0}' cannot be a Java primitive for {1}.",
166 _type, _name));
167
168 attr.setType(type);
169 }
170
171 attr.setRequired(_isRequired);
172
173 if (_isFragment && _isRtexprvalue != null)
174 throw error(L.l("@attribute rtexprvalue cannot be set when fragment is true."));
175
176 if (_isFragment && _type != null)
177 throw error(L.l("@attribute type cannot be set when fragment is true."));
178
179 if (_isRtexprvalue == null || Boolean.TRUE.equals(_isRtexprvalue))
180 attr.setRtexprvalue(Boolean.TRUE);
181
182 if (_isFragment)
183 attr.setType(JspFragment .class);
184
185 if (_deferredValue && _deferredValueType != null)
186 throw error(L.l("@attribute deferredValue and deferredValueType may not both be specified"));
187
188 if (_deferredMethod && _deferredMethodSignature != null)
189 throw error(L.l("@attribute deferredMethod and deferredMethodSignature may not both be specified"));
190
191 if ((_deferredValue || _deferredValueType != null)
192 && (_deferredMethod || _deferredMethodSignature != null))
193 throw error(L.l("@attribute deferredValue and deferredMethod may not both be specified"));
194
195 if (_deferredValue || _deferredValueType != null) {
196 attr.setDeferredValue(new TldAttribute.DeferredValue());
197
198 if (_deferredValueType != null)
199 attr.getDeferredValue().setType(_deferredValueType);
200 }
201
202 if (_deferredMethod || _deferredMethodSignature != null) {
203 attr.setDeferredMethod(new TldAttribute.DeferredMethod());
204
205 if (_deferredMethodSignature != null)
206 attr.getDeferredMethod().setMethodSignature(new Signature(_deferredMethodSignature));
207 }
208
209 tagGen.addAttribute(attr);
210 }
211
212
215 public boolean isStatic()
216 {
217 return true;
218 }
219
220
225 public void printXml(WriteStream os)
226 throws IOException
227 {
228 os.print("<jsp:directive.attribute");
229 os.print(" jsp:id=\"" + _gen.generateJspId() + "\"");
230 os.print(" name=\"" + _name + "\"");
231
232 if (_type != null)
233 os.print(" type=\"" + _type + "\"");
234
235 os.println("/>");
236 }
237
238
243 public void generate(JspJavaWriter out)
244 throws Exception
245 {
246 }
247 }
248 |
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