package annotationSample;

import java.lang.reflect.Field;

public class Tester {

public static void main(String[] args) {

BankAccount account = new BankAccount(1, "Dev", 160790.37);

try {

System.out.println(getXMLString(account));

} catch (Exception e) {

e.printStackTrace();

}

}

public static String getXMLString(Object object) throws Exception {

Class<?> aClass = object.getClass();

if (!aClass.isAnnotationPresent(XMLSerializable.class)) {

throw new RuntimeException("XMLSerializable annotation not present");

}

StringBuilder strBuilder = new StringBuilder();

for (Field field : aClass.getDeclaredFields()) {

field.setAccessible(true);

if (field.isAnnotationPresent(XMLElement.class)) {

String fieldTag = getTagFor(field);

strBuilder.append("\t<").append(fieldTag).append(">")

.append(field.get(object).toString())

.append("</").append(fieldTag).append(">\n");

}

}

String classTag = getTagFor(aClass);

return "<" + classTag + ">\n" + strBuilder + "</" + classTag + ">";

}

public static String getTagFor(Class<?> aClass) {

String tag = aClass.getAnnotation(XMLSerializable.class).tag();

return tag.isEmpty() ? aClass.getSimpleName() : tag;

}

public static String getTagFor(Field field) {

String tag = field.getAnnotation(XMLElement.class).tag();

return tag.isEmpty() ? field.getName() : tag;

}

}