/**
* This method is only intended to be used by Utilities class in this package. The reason that
* this method is not recursive by itself is because we want to allow recursive types.
*/
@Override
protected void init(Class<?> objectClass, ObjectInspectorFactory.ObjectInspectorOptions options) {
verifyObjectClassType(objectClass);
this.objectClass = objectClass;
final Field fieldMetaData;
try {
fieldMetaData = objectClass.getDeclaredField(FIELD_METADATA_MAP);
assert (Map.class.isAssignableFrom(fieldMetaData.getType()));
fieldMetaData.setAccessible(true);
} catch (NoSuchFieldException e) {
throw new RuntimeException("Unable to find field metadata for thrift union field ", e);
}
try {
final Map<? extends TFieldIdEnum, FieldMetaData> fieldMap =
(Map<? extends TFieldIdEnum, FieldMetaData>) fieldMetaData.get(null);
fields = new ArrayList<StandardStructObjectInspector.MyField>(fieldMap.size());
this.ois = new ArrayList<ObjectInspector>();
for (Map.Entry<? extends TFieldIdEnum, FieldMetaData> metadata : fieldMap.entrySet()) {
int fieldId = metadata.getKey().getThriftFieldId();
String fieldName = metadata.getValue().fieldName;
final Type fieldType = ThriftObjectInspectorUtils.getFieldType(objectClass, fieldName);
final ObjectInspector reflectionObjectInspector =
ObjectInspectorFactory.getReflectionObjectInspector(fieldType, options);
fields.add(
new StandardStructObjectInspector.MyField(
fieldId, fieldName, reflectionObjectInspector));
this.ois.add(reflectionObjectInspector);
}
} catch (IllegalAccessException e) {
throw new RuntimeException("Unable to find field metadata for thrift union field ", e);
}
}
/** Get the type name of the Java class. */
public static String getTypeNameFromJavaClass(Type t) {
try {
ObjectInspector oi =
ObjectInspectorFactory.getReflectionObjectInspector(t, ObjectInspectorOptions.JAVA);
return oi.getTypeName();
} catch (Throwable e) {
LOG.info(StringUtils.stringifyException(e));
return "unknown";
}
}
