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1
28
29 package com.caucho.jsp.java;
30
31 import com.caucho.el.Expr;
32 import com.caucho.jsp.JspParseException;
33 import com.caucho.jsp.el.JspELParser;
34 import com.caucho.vfs.WriteStream;
35 import com.caucho.xml.QName;
36
37 import java.io.IOException  ;
38
39 public class JstlCoreOut extends JstlNode {
40 private static final QName VALUE = new QName("value");
41 private static final QName ESCAPE_XML = new QName("escapeXml");
42 private static final QName DEFAULT = new QName("default");
43
44 private String _value;
45 private String _escapeXml = "true";
46 private String _default;
47
48 private JspAttribute _valueAttr;
49 private JspAttribute _escapeXmlAttr;
50 private JspAttribute _defaultAttr;
51
52
55 public void addAttribute(QName name, String value)
56 throws JspParseException
57 {
58 if (VALUE.equals(name))
59 _value = value;
60 else if (ESCAPE_XML.equals(name))
61 _escapeXml = value;
62 else if (DEFAULT.equals(name))
63 _default = value;
64 else
65 throw error(L.l("`{0}' is an unknown attribute for <{1}>.",
66 name.getName(), getTagName()));
67 }
68
69
72 public void addAttribute(QName name, JspAttribute value)
73 throws JspParseException
74 {
75 if (VALUE.equals(name))
76 _valueAttr = value;
77 else if (ESCAPE_XML.equals(name))
78 _escapeXmlAttr = value;
79 else if (DEFAULT.equals(name))
80 _defaultAttr = value;
81 else
82 throw error(L.l("`{0}' is an unknown attribute for <{1}>.",
83 name.getName(), getTagName()));
84 }
85
86
91 public void printXml(WriteStream os)
92 throws IOException
93 {
94 os.print("<c:out");
95
96 if (_value != null) {
97 os.print(" value=\"");
98 printXmlText(os, _value);
99 os.print("\"");
100 }
101 os.print(">");
102
103 printXmlChildren(os);
104
105 os.print("</c:out>");
106 }
107
108
111 public void generate(JspJavaWriter out)
112 throws Exception
113 {
114 if (_value == null && _valueAttr == null)
115 throw error(L.l("required attribute `value' missing from <{0}>",
116 getTagName()));
117
118 String escapeXml = "true";
119
120 if (_escapeXml != null)
121 escapeXml = generateValue(boolean.class, _escapeXml);
122 else if (_escapeXmlAttr != null)
123 escapeXml = _escapeXmlAttr.generateValue(String .class);
124
125 if (_escapeXml != null && (_default != null || _defaultAttr != null)) {
126 String var = "_jsp_var_" + _gen.uniqueId();
127
128 out.println("boolean " + var + " = " + escapeXml + ";");
129 escapeXml = var;
130 }
131
132 if (_default != null || _defaultAttr != null || hasChildren())
133 out.print("if (");
134
135 if (_valueAttr != null) {
136 out.print("com.caucho.el.Expr.toStream(out, ");
137 out.print(_valueAttr.generateValue(String .class));
138 out.print(", " + escapeXml + ")");
139 }
140 else if (hasRuntimeAttribute(_value)) {
141 out.print("com.caucho.el.Expr.toStream(out, ");
142 out.print(generateRTValue(String .class, _value));
143 out.print(", " + escapeXml + ")");
144 }
145 else {
146 int index = _gen.addExpr(_value);
147
148 out.print("_caucho_expr_" + index +
149 ".print(out, _jsp_env, " + escapeXml + ")");
150 }
151
152 if (_default != null || _defaultAttr != null) {
153 out.println(") {");
154 out.pushDepth();
155
156 if (_defaultAttr != null) {
157 out.print("com.caucho.el.Expr.toStream(out, ");
158 out.print(_defaultAttr.generateValue(String .class));
159 out.println(", " + escapeXml + ");");
160 }
161 else if (hasRuntimeAttribute(_default)) {
162 out.print("com.caucho.el.Expr.toStream(out, ");
163 out.print(generateRTValue(String .class, _default));
164 out.println(", " + escapeXml + ");");
165 }
166 else {
167 Expr defaultExpr = new JspELParser(_gen.getELContext(),
168 _default).parse();
169
170 if (defaultExpr.isConstant() && escapeXml.equals("true")) {
171 String string = defaultExpr.evalString(null);
172
173 if (string != null && ! string.equals("")) {
174 out.print("com.caucho.el.Expr.toStreamEscaped(out, \"");
175 out.printJavaString(string);
176 out.println("\");");
177 }
178 }
179 else if (defaultExpr.isConstant() && escapeXml.equals("false")) {
180 String string = defaultExpr.evalString(null);
181
182 if (string != null && ! string.equals("")) {
183 out.addText(string);
184 }
185 }
186 else {
187 int defaultIndex = _gen.addExpr(defaultExpr);
188 out.println("_caucho_expr_" + defaultIndex +
189 ".print(out, _jsp_env, " + escapeXml + ");");
190 }
191 }
192
193 out.popDepth();
194 out.println("}");
195 }
196 else if (! hasChildren()) {
197 out.println(";");
198 }
199 else if (isChildrenStatic()) {
200 out.println(") {");
201 out.pushDepth();
202
203 out.print("com.caucho.el.Expr.toStream(out, ");
204 out.print("\"" + escapeJavaString(getStaticText().trim()) + "\"");
205 out.println(", " + escapeXml + ");");
206
207 out.popDepth();
208 out.println("}");
209 }
210 else {
211 out.println(") {");
212 out.pushDepth();
213
214 out.println("out = pageContext.pushBody();");
215
216 generateChildren(out);
217
218 out.println("pageContext.printBody((com.caucho.jsp.BodyContentImpl) out, " + escapeXml + ");");
219
220 out.println("out = pageContext.popAndReleaseBody();");
221
222 out.popDepth();
223 out.println("}");
224 }
225 }
226 }
227 |
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