//these two data member are to indicate
//whether the corresponding attribute is specified
boolean hasDefault=false, hasEscapeXml=false;
hasDefault = ctxt.isAttributeSpecified("default");
hasEscapeXml = ctxt.isAttributeSpecified("escapeXml");
//strValName, strEscapeXmlName & strDefName are two variables' name
//standing for value, escapeXml and default attribute
String strValName = ctxt.getTemporaryVariableName();
String strDefName = ctxt.getTemporaryVariableName();
String strEscapeXmlName = ctxt.getTemporaryVariableName();
//according to the tag file, the value attribute is mandatory.
ctxt.generateJavaSource("String " + strValName + " = null;");
ctxt.generateJavaSource("if(");
ctxt.generateAttribute("value");
ctxt.generateJavaSource("!=null){");
ctxt.generateJavaSource(" " + strValName + " = (");
ctxt.generateAttribute("value");
ctxt.generateJavaSource(").toString();");
ctxt.generateJavaSource("}");
//initiate the strDefName with null.
//if the default has been specified, then assign the value to it;
ctxt.generateJavaSource("String " + strDefName + " = null;\n");
if(hasDefault){
ctxt.generateJavaSource("if(");
ctxt.generateAttribute("default");
ctxt.generateJavaSource(" != null){");
ctxt.generateJavaSource(strDefName + " = (");
ctxt.generateAttribute("default");
ctxt.generateJavaSource(").toString();");
ctxt.generateJavaSource("}");
}
//initiate the strEscapeXmlName with true;
//if the escapeXml is specified, assign the value to it;
ctxt.generateJavaSource("boolean " + strEscapeXmlName + " = true;");
if(hasEscapeXml){
ctxt.generateJavaSource(strEscapeXmlName + " = Boolean.parseBoolean((");
ctxt.generateAttribute("default");
ctxt.generateJavaSource(").toString());");
}
//main part.
ctxt.generateJavaSource("if(null != " + strValName +"){");
ctxt.generateJavaSource(" if(" + strEscapeXmlName + "){");
ctxt.generateJavaSource(" " + strValName + " = org.apache.jasper.tagplugins.jstl.Util.escapeXml(" + strValName + ");");
ctxt.generateJavaSource(" }");
ctxt.generateJavaSource(" out.write(" + strValName + ");");
ctxt.generateJavaSource("}else{");
ctxt.generateJavaSource(" if(null != " + strDefName + "){");
ctxt.generateJavaSource(" if(" + strEscapeXmlName + "){");
ctxt.generateJavaSource(" " + strDefName + " = org.apache.jasper.tagplugins.jstl.Util.escapeXml(" + strDefName + ");");
ctxt.generateJavaSource(" }");
ctxt.generateJavaSource(" out.write(" + strDefName + ");");
ctxt.generateJavaSource(" }else{");
ctxt.generateBody();
ctxt.generateJavaSource(" }");
ctxt.generateJavaSource("}");
