1 /* 2 * $Id: ELMessageTag.java 471754 2006-11-06 14:55:09Z husted $ 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 package org.apache.strutsel.taglib.bean; 22 23 import org.apache.struts.taglib.bean.MessageTag; 24 import org.apache.strutsel.taglib.utils.EvalHelper; 25 26 import javax.servlet.jsp.JspException; 27 28 /** 29 * Custom tag that retrieves an internationalized messages string (with 30 * optional parametric replacement) from the <code>ActionResources</code> 31 * object stored as a context attribute by our associated 32 * <code>ActionServlet</code> implementation. <p> This class is a subclass of 33 * the class <code>org.apache.struts.taglib.bean.MessageTag</code> which 34 * provides most of the described functionality. This subclass allows all 35 * attribute values to be specified as expressions utilizing the JavaServer 36 * Pages Standard Library expression language. 37 * 38 * @version $Rev: 471754 $ 39 */ 40 public class ELMessageTag extends MessageTag { 41 /** 42 * Instance variable mapped to "arg0" tag attribute. (Mapping set in 43 * associated BeanInfo class.) 44 */ 45 private String arg0Expr; 46 47 /** 48 * Instance variable mapped to "arg1" tag attribute. (Mapping set in 49 * associated BeanInfo class.) 50 */ 51 private String arg1Expr; 52 53 /** 54 * Instance variable mapped to "arg2" tag attribute. (Mapping set in 55 * associated BeanInfo class.) 56 */ 57 private String arg2Expr; 58 59 /** 60 * Instance variable mapped to "arg3" tag attribute. (Mapping set in 61 * associated BeanInfo class.) 62 */ 63 private String arg3Expr; 64 65 /** 66 * Instance variable mapped to "arg4" tag attribute. (Mapping set in 67 * associated BeanInfo class.) 68 */ 69 private String arg4Expr; 70 71 /** 72 * Instance variable mapped to "bundle" tag attribute. (Mapping set in 73 * associated BeanInfo class.) 74 */ 75 private String bundleExpr; 76 77 /** 78 * Instance variable mapped to "key" tag attribute. (Mapping set in 79 * associated BeanInfo class.) 80 */ 81 private String keyExpr; 82 83 /** 84 * Instance variable mapped to "locale" tag attribute. (Mapping set in 85 * associated BeanInfo class.) 86 */ 87 private String localeExpr; 88 89 /** 90 * Instance variable mapped to "name" tag attribute. (Mapping set in 91 * associated BeanInfo class.) 92 */ 93 private String nameExpr; 94 95 /** 96 * Instance variable mapped to "property" tag attribute. (Mapping set in 97 * associated BeanInfo class.) 98 */ 99 private String propertyExpr; 100 101 /** 102 * Instance variable mapped to "scope" tag attribute. (Mapping set in 103 * associated BeanInfo class.) 104 */ 105 private String scopeExpr; 106 107 /** 108 * Getter method for "arg0" tag attribute. (Mapping set in associated 109 * BeanInfo class.) 110 */ 111 public String getArg0Expr() { 112 return (arg0Expr); 113 } 114 115 /** 116 * Getter method for "arg1" tag attribute. (Mapping set in associated 117 * BeanInfo class.) 118 */ 119 public String getArg1Expr() { 120 return (arg1Expr); 121 } 122 123 /** 124 * Getter method for "arg2" tag attribute. (Mapping set in associated 125 * BeanInfo class.) 126 */ 127 public String getArg2Expr() { 128 return (arg2Expr); 129 } 130 131 /** 132 * Getter method for "arg3" tag attribute. (Mapping set in associated 133 * BeanInfo class.) 134 */ 135 public String getArg3Expr() { 136 return (arg3Expr); 137 } 138 139 /** 140 * Getter method for "arg4" tag attribute. (Mapping set in associated 141 * BeanInfo class.) 142 */ 143 public String getArg4Expr() { 144 return (arg4Expr); 145 } 146 147 /** 148 * Getter method for "bundle" tag attribute. (Mapping set in associated 149 * BeanInfo class.) 150 */ 151 public String getBundleExpr() { 152 return (bundleExpr); 153 } 154 155 /** 156 * Getter method for "key" tag attribute. (Mapping set in associated 157 * BeanInfo class.) 158 */ 159 public String getKeyExpr() { 160 return (keyExpr); 161 } 162 163 /** 164 * Getter method for "locale" tag attribute. (Mapping set in associated 165 * BeanInfo class.) 166 */ 167 public String getLocaleExpr() { 168 return (localeExpr); 169 } 170 171 /** 172 * Getter method for "name" tag attribute. (Mapping set in associated 173 * BeanInfo class.) 174 */ 175 public String getNameExpr() { 176 return (nameExpr); 177 } 178 179 /** 180 * Getter method for "property" tag attribute. (Mapping set in associated 181 * BeanInfo class.) 182 */ 183 public String getPropertyExpr() { 184 return (propertyExpr); 185 } 186 187 /** 188 * Getter method for "scope" tag attribute. (Mapping set in associated 189 * BeanInfo class.) 190 */ 191 public String getScopeExpr() { 192 return (scopeExpr); 193 } 194 195 /** 196 * Setter method for "arg0" tag attribute. (Mapping set in associated 197 * BeanInfo class.) 198 */ 199 public void setArg0Expr(String arg0Expr) { 200 this.arg0Expr = arg0Expr; 201 } 202 203 /** 204 * Setter method for "arg1" tag attribute. (Mapping set in associated 205 * BeanInfo class.) 206 */ 207 public void setArg1Expr(String arg1Expr) { 208 this.arg1Expr = arg1Expr; 209 } 210 211 /** 212 * Setter method for "arg2" tag attribute. (Mapping set in associated 213 * BeanInfo class.) 214 */ 215 public void setArg2Expr(String arg2Expr) { 216 this.arg2Expr = arg2Expr; 217 } 218 219 /** 220 * Setter method for "arg3" tag attribute. (Mapping set in associated 221 * BeanInfo class.) 222 */ 223 public void setArg3Expr(String arg3Expr) { 224 this.arg3Expr = arg3Expr; 225 } 226 227 /** 228 * Setter method for "arg4" tag attribute. (Mapping set in associated 229 * BeanInfo class.) 230 */ 231 public void setArg4Expr(String arg4Expr) { 232 this.arg4Expr = arg4Expr; 233 } 234 235 /** 236 * Setter method for "bundle" tag attribute. (Mapping set in associated 237 * BeanInfo class.) 238 */ 239 public void setBundleExpr(String bundleExpr) { 240 this.bundleExpr = bundleExpr; 241 } 242 243 /** 244 * Setter method for "key" tag attribute. (Mapping set in associated 245 * BeanInfo class.) 246 */ 247 public void setKeyExpr(String keyExpr) { 248 this.keyExpr = keyExpr; 249 } 250 251 /** 252 * Setter method for "locale" tag attribute. (Mapping set in associated 253 * BeanInfo class.) 254 */ 255 public void setLocaleExpr(String localeExpr) { 256 this.localeExpr = localeExpr; 257 } 258 259 /** 260 * Setter method for "name" tag attribute. (Mapping set in associated 261 * BeanInfo class.) 262 */ 263 public void setNameExpr(String nameExpr) { 264 this.nameExpr = nameExpr; 265 } 266 267 /** 268 * Setter method for "property" tag attribute. (Mapping set in associated 269 * BeanInfo class.) 270 */ 271 public void setPropertyExpr(String propertyExpr) { 272 this.propertyExpr = propertyExpr; 273 } 274 275 /** 276 * Setter method for "scope" tag attribute. (Mapping set in associated 277 * BeanInfo class.) 278 */ 279 public void setScopeExpr(String scopeExpr) { 280 this.scopeExpr = scopeExpr; 281 } 282 283 /** 284 * Resets attribute values for tag reuse. 285 */ 286 public void release() { 287 super.release(); 288 setArg0Expr(null); 289 setArg1Expr(null); 290 setArg2Expr(null); 291 setArg3Expr(null); 292 setArg4Expr(null); 293 setBundleExpr(null); 294 setKeyExpr(null); 295 setLocaleExpr(null); 296 setNameExpr(null); 297 setPropertyExpr(null); 298 setScopeExpr(null); 299 } 300 301 /** 302 * Process the start tag. 303 * 304 * @throws JspException if a JSP exception has occurred 305 */ 306 public int doStartTag() throws JspException { 307 evaluateExpressions(); 308 309 return (super.doStartTag()); 310 } 311 312 /** 313 * Processes all attribute values which use the JSTL expression evaluation 314 * engine to determine their values. 315 * 316 * @throws JspException if a JSP exception has occurred 317 */ 318 private void evaluateExpressions() 319 throws JspException { 320 String string = null; 321 322 if ((string = 323 EvalHelper.evalString("arg0", getArg0Expr(), this, pageContext)) != null) { 324 setArg0(string); 325 } 326 327 if ((string = 328 EvalHelper.evalString("arg1", getArg1Expr(), this, pageContext)) != null) { 329 setArg1(string); 330 } 331 332 if ((string = 333 EvalHelper.evalString("arg2", getArg2Expr(), this, pageContext)) != null) { 334 setArg2(string); 335 } 336 337 if ((string = 338 EvalHelper.evalString("arg3", getArg3Expr(), this, pageContext)) != null) { 339 setArg3(string); 340 } 341 342 if ((string = 343 EvalHelper.evalString("arg4", getArg4Expr(), this, pageContext)) != null) { 344 setArg4(string); 345 } 346 347 if ((string = 348 EvalHelper.evalString("bundle", getBundleExpr(), this, 349 pageContext)) != null) { 350 setBundle(string); 351 } 352 353 if ((string = 354 EvalHelper.evalString("key", getKeyExpr(), this, pageContext)) != null) { 355 setKey(string); 356 } 357 358 if ((string = 359 EvalHelper.evalString("locale", getLocaleExpr(), this, 360 pageContext)) != null) { 361 setLocale(string); 362 } 363 364 if ((string = 365 EvalHelper.evalString("name", getNameExpr(), this, pageContext)) != null) { 366 setName(string); 367 } 368 369 if ((string = 370 EvalHelper.evalString("property", getPropertyExpr(), this, 371 pageContext)) != null) { 372 setProperty(string); 373 } 374 375 if ((string = 376 EvalHelper.evalString("scope", getScopeExpr(), this, pageContext)) != null) { 377 setScope(string); 378 } 379 } 380 }