//flags
boolean hasVar, hasContext, hasScope;
//init flags
hasVar = ctxt.isAttributeSpecified("var");
hasContext = ctxt.isAttributeSpecified("context");
hasScope = ctxt.isAttributeSpecified("scope");
//define name of the temp variables
String valueName = ctxt.getTemporaryVariableName();
String contextName = ctxt.getTemporaryVariableName();
String baseUrlName = ctxt.getTemporaryVariableName();
String resultName = ctxt.getTemporaryVariableName();
String responseName = ctxt.getTemporaryVariableName();
//get the scope
String strScope = "page";
if(hasScope){
strScope = ctxt.getConstantAttribute("scope");
}
int iScope = Util.getScope(strScope);
//get the value
ctxt.generateJavaSource("String " + valueName + " = ");
ctxt.generateAttribute("value");
ctxt.generateJavaSource(";");
//get the context
ctxt.generateJavaSource("String " + contextName + " = null;");
if(hasContext){
ctxt.generateJavaSource(contextName + " = ");
ctxt.generateAttribute("context");
ctxt.generateJavaSource(";");
}
//get the raw url
ctxt.generateJavaSource("String " + baseUrlName + " = " +
"org.apache.jasper.tagplugins.jstl.Util.resolveUrl(" + valueName + ", " + contextName + ", pageContext);");
ctxt.generateJavaSource("pageContext.setAttribute" +
"(\"url_without_param\", " + baseUrlName + ");");
//add params
ctxt.generateBody();
ctxt.generateJavaSource("String " + resultName + " = " +
"(String)pageContext.getAttribute(\"url_without_param\");");
ctxt.generateJavaSource("pageContext.removeAttribute(\"url_without_param\");");
//if the url is relative, encode it
ctxt.generateJavaSource("if(!org.apache.jasper.tagplugins.jstl.Util.isAbsoluteUrl(" + resultName + ")){");
ctxt.generateJavaSource(" HttpServletResponse " + responseName + " = " +
"((HttpServletResponse) pageContext.getResponse());");
ctxt.generateJavaSource(" " + resultName + " = "
+ responseName + ".encodeURL(" + resultName + ");");
ctxt.generateJavaSource("}");
//if "var" is specified, the url string store in the attribute var defines
if(hasVar){
String strVar = ctxt.getConstantAttribute("var");
ctxt.generateJavaSource("pageContext.setAttribute" +
"(\"" + strVar + "\", " + resultName + ", " + iScope + ");");
//if var is not specified, just print out the url string
}else{
ctxt.generateJavaSource("try{");
ctxt.generateJavaSource(" pageContext.getOut().print(" + resultName + ");");
ctxt.generateJavaSource("}catch(java.io.IOException ex){");
ctxt.generateJavaSource(" throw new JspTagException(ex.toString(), ex);");
ctxt.generateJavaSource("}");
}
