*/
public Writable serialize(Object obj, ObjectInspector objInspector)
throws SerDeException {
if (objInspector.getCategory() != Category.STRUCT) {
throw new SerDeException(getClass().toString()
+ " can only serialize struct types, but we got: "
+ objInspector.getTypeName());
}
// Prepare the field ObjectInspectors
StructObjectInspector soi = (StructObjectInspector) objInspector;
List<? extends StructField> fields = soi.getAllStructFieldRefs();
List<Object> list = soi.getStructFieldsDataAsList(obj);
List<? extends StructField> declaredFields = (serdeParams.getRowTypeInfo() != null && ((StructTypeInfo) serdeParams
.getRowTypeInfo()).getAllStructFieldNames().size() > 0) ? ((StructObjectInspector) getObjectInspector())
.getAllStructFieldRefs()
: null;
try {
// used for avoid extra byte copy
serializeStream.reset();
int count = 0;
// Serialize each field
for (int i = 0; i < fields.size(); i++) {
// Get the field objectInspector and the field object.
ObjectInspector foi = fields.get(i).getFieldObjectInspector();
Object f = (list == null ? null : list.get(i));
if (declaredFields != null && i >= declaredFields.size()) {
throw new SerDeException("Error: expecting " + declaredFields.size()
+ " but asking for field " + i + "\n" + "data=" + obj + "\n"
+ "tableType=" + serdeParams.getRowTypeInfo().toString() + "\n"
+ "dataType="
+ TypeInfoUtils.getTypeInfoFromObjectInspector(objInspector));
}
// If the field that is passed in is NOT a primitive, and either the
// field is not declared (no schema was given at initialization), or
// the field is declared as a primitive in initialization, serialize
// the data to JSON string. Otherwise serialize the data in the
// delimited way.
if (!foi.getCategory().equals(Category.PRIMITIVE)
&& (declaredFields == null || declaredFields.get(i)
.getFieldObjectInspector().getCategory().equals(
Category.PRIMITIVE))) {
LazySimpleSerDe.serialize(serializeStream,
SerDeUtils.getJSONString(f, foi),
PrimitiveObjectInspectorFactory.javaStringObjectInspector,
serdeParams.getSeparators(), 1, serdeParams.getNullSequence(),
serdeParams.isEscaped(), serdeParams.getEscapeChar(),
serdeParams.getNeedsEscape());
} else {
LazySimpleSerDe.serialize(serializeStream, f, foi,
serdeParams.getSeparators(), 1, serdeParams.getNullSequence(),
serdeParams.isEscaped(), serdeParams.getEscapeChar(),
serdeParams.getNeedsEscape());
}
field[i].set(serializeStream.getData(), count, serializeStream
.getCount()
- count);
count = serializeStream.getCount();
}
} catch (IOException e) {
throw new SerDeException(e);
}
return serializeCache;
}