/**
* Boring code to get constraints from the field annotations
*
* @param field
* @return
*/
protected String getFieldAnnotationConstraints(Field field) {
List<String> constraints = new ArrayList<String>();
if (field.getAnnotation(Email.class) != null) {
constraints.add("Email");
}
if (field.getAnnotation(Future.class) != null) {
constraints.add("Future date");
}
if (field.getAnnotation(NotNull.class) != null) {
constraints.add("Not null");
}
if (field.getAnnotation(Past.class) != null) {
constraints.add("Past date");
}
if (field.getAnnotation(NotEmpty.class) != null) {
constraints.add("Not empty");
}
if (field.getAnnotation(Pattern.class) != null) {
constraints.add(
String.format("Pattern(regexp = '%s')", field.getAnnotation(Pattern.class).regexp()));
}
if (field.getAnnotation(Length.class) != null) {
constraints.add(
String.format(
"Length(min = %d, max = %d)",
field.getAnnotation(Length.class).min(), field.getAnnotation(Length.class).max()));
}
if (field.getAnnotation(Size.class) != null) {
constraints.add(
String.format(
"Size(min = %d, max = %d)",
field.getAnnotation(Size.class).min(), field.getAnnotation(Size.class).max()));
}
if (field.getAnnotation(Range.class) != null) {
constraints.add(
String.format(
"Range(min = %d, max = %d)",
field.getAnnotation(Range.class).min(), field.getAnnotation(Range.class).max()));
}
if (constraints.size() == 0) {
return null;
}
StringBuffer buff = new StringBuffer();
Iterator<String> constraintsIt = constraints.iterator();
while (constraintsIt.hasNext()) {
String value = constraintsIt.next();
buff.append(value);
if (constraintsIt.hasNext()) {
buff.append(", ");
}
}
return buff.toString();
}
/**
* Extract the enumeration constants
*
* @param enumeration is the enumeration
* @return is the string with constants
*/
protected String getEnumerationConstants(Class<?> enumeration) {
Object[] constants = enumeration.getEnumConstants();
int idx = 0;
StringBuffer strBuff = new StringBuffer();
for (Object konst : constants) {
strBuff.append(konst.toString());
if (idx < constants.length - 1) {
strBuff.append(", ");
}
++idx;
}
return strBuff.toString();
}