public MetaData getMetaData(int index) {
if (indexMap == null || indexMap.length < index + 1) {
int startFrom = 0;
int lastIndex = index;
if (indexMap != null) {
startFrom = indexMap.length;
indexMap = Arrays.copyOf(indexMap, index + 1);
} else {
String[] headers = context.headers();
if (headers != null && lastIndex < headers.length) {
lastIndex = headers.length;
}
int[] indexes = context.extractedFieldIndexes();
if (indexes != null) {
for (int i = 0; i < indexes.length; i++) {
if (lastIndex < indexes[i]) {
lastIndex = indexes[i];
}
}
}
indexMap = new MetaData[lastIndex + 1];
}
for (int i = startFrom; i < lastIndex + 1; i++) {
indexMap[i] = new MetaData(i);
}
}
return indexMap[index];
}
private MetaData getMetaData(Enum<?> column) {
String[] headers = context.headers();
if (headers == null || headers.length == 0) {
throw new IllegalStateException(
"No headers parsed from input nor provided in the user settings. Only index-based operations are available.");
}
return getMetaData(context.indexOf(column));
}
@Override
public boolean containsColumn(String headerName) {
if (headerName == null) {
return false;
}
return context.indexOf(headerName) != -1;
}
private String[] getValidatedHeaders() {
String[] headers = context.headers();
if (headers == null || headers.length == 0) {
throw new IllegalStateException(
"No headers parsed from input nor provided in the user settings. Only index-based operations are available.");
}
return headers;
}
private MetaData getMetaData(String name) {
int index = context.indexOf(name);
if (index == -1) {
getValidatedHeaders();
throw new IllegalArgumentException(
"Header name '"
+ name
+ "' not found. Available columns are: "
+ Arrays.asList(headers()));
}
return getMetaData(index);
}
@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;
}
}
@Override
public String[] selectedHeaders() {
return context.selectedHeaders();
}
@Override
public String[] headers() {
return context.headers();
}