private void initializeMetadataConversions(String[] data, MetaData md) {
if (conversions != null) {
String[] headers = headers();
if (headers == null) {
headers = data;
}
conversions.prepareExecution(false, headers);
md.setDefaultConversions(conversions.getConversions(md.index, md.type));
}
}
@SuppressWarnings({"rawtypes", "unchecked"})
private <T> T convert(
MetaData md, String[] data, Class<T> type, T defaultValue, Annotation annotation) {
Object out = data[md.index];
if (out == null) {
out = defaultValue == null ? md.defaultValue : defaultValue;
}
if (annotation == null) {
initializeMetadataConversions(data, md);
out = md.convert(out);
if (out == null) {
out = defaultValue == null ? md.defaultValue : defaultValue;
}
}
if (type != null) {
if (out != null && type.isAssignableFrom(out.getClass())) {
return (T) out;
}
Conversion conversion;
if (type != String.class) {
if (annotation == null) {
conversion = conversionByType.get(type);
if (conversion == null) {
conversion = AnnotationHelper.getDefaultConversion(type, null);
conversionByType.put(type, conversion);
}
} else {
Map<Annotation, Conversion> m = conversionsByAnnotation.get(type);
if (m == null) {
m = new HashMap<Annotation, Conversion>();
conversionsByAnnotation.put(type, m);
}
conversion = m.get(annotation);
if (conversion == null) {
conversion = AnnotationHelper.getConversion(type, annotation);
m.put(annotation, conversion);
}
}
if (conversion == null) {
String message = "";
if (type == Date.class || type == Calendar.class) {
message = ". Need to specify format for date";
}
DataProcessingException exception =
new DataProcessingException(
"Cannot convert '{value}' to " + type.getName() + message);
exception.setValue(out);
exception.setErrorContentLength(context.errorContentLength());
throw exception;
}
out = conversion.execute(out);
}
}
if (type == null) {
return (T) out;
}
try {
return type.cast(out);
} catch (ClassCastException e) {
DataProcessingException exception =
new DataProcessingException(
"Cannot cast value '{value}' of type "
+ out.getClass().toString()
+ " to "
+ type.getName());
exception.setValue(out);
exception.setErrorContentLength(context.errorContentLength());
throw exception;
}
}