public void printFileInfo() throws Exception { System.out.println("Reader: " + m_reader); System.out.println("# Rows: " + m_reader.getNumberOfRows()); System.out.println("# Types in the file: " + m_types.size()); for (int i = 0; i < m_types.size(); i++) { System.out.println("Type " + i + ": " + m_types.get(i).getKind()); } System.out.println("Compression: " + m_reader.getCompression()); if (m_reader.getCompression() != CompressionKind.NONE) { System.out.println("Compression size: " + m_reader.getCompressionSize()); } m_oi = (StructObjectInspector) m_reader.getObjectInspector(); System.out.println("object inspector type category: " + m_oi.getCategory()); System.out.println("object inspector type name : " + m_oi.getTypeName()); System.out.println("Number of columns in the table: " + m_fields.size()); // Print the type info: for (int i = 0; i < m_fields.size(); i++) { System.out.println("Column " + i + " name: " + m_fields.get(i).getFieldName()); ObjectInspector lv_foi = m_fields.get(i).getFieldObjectInspector(); System.out.println("Column " + i + " type category: " + lv_foi.getCategory()); System.out.println("Column " + i + " type name: " + lv_foi.getTypeName()); } }
/** * @param oi - Input object inspector * @param oiSettableProperties - Lookup map to cache the result.(If no caching, pass null) * @return - true if : (1) oi is an instance of settable<DataType>OI. (2) All the embedded object * inspectors are instances of settable<DataType>OI. If (1) or (2) is false, return false. */ public static boolean hasAllFieldsSettable( ObjectInspector oi, Map<ObjectInspector, Boolean> oiSettableProperties) { // If the result is already present in the cache, return it. if (!(oiSettableProperties == null) && oiSettableProperties.containsKey(oi)) { return oiSettableProperties.get(oi).booleanValue(); } // If the top-level object inspector is non-settable return false if (!(isInstanceOfSettableOI(oi))) { return setOISettablePropertiesMap(oi, oiSettableProperties, false); } Boolean returnValue = true; switch (oi.getCategory()) { case PRIMITIVE: break; case STRUCT: StructObjectInspector structOutputOI = (StructObjectInspector) oi; List<? extends StructField> listFields = structOutputOI.getAllStructFieldRefs(); for (StructField listField : listFields) { if (!hasAllFieldsSettable(listField.getFieldObjectInspector(), oiSettableProperties)) { returnValue = false; break; } } break; case LIST: ListObjectInspector listOutputOI = (ListObjectInspector) oi; returnValue = hasAllFieldsSettable( listOutputOI.getListElementObjectInspector(), oiSettableProperties); break; case MAP: MapObjectInspector mapOutputOI = (MapObjectInspector) oi; returnValue = hasAllFieldsSettable(mapOutputOI.getMapKeyObjectInspector(), oiSettableProperties) && hasAllFieldsSettable( mapOutputOI.getMapValueObjectInspector(), oiSettableProperties); break; case UNION: UnionObjectInspector unionOutputOI = (UnionObjectInspector) oi; List<ObjectInspector> unionListFields = unionOutputOI.getObjectInspectors(); for (ObjectInspector listField : unionListFields) { if (!hasAllFieldsSettable(listField, oiSettableProperties)) { returnValue = false; break; } } break; default: throw new RuntimeException( "Hive internal error inside hasAllFieldsSettable : " + oi.getTypeName() + " not supported yet."); } return setOISettablePropertiesMap(oi, oiSettableProperties, returnValue); }
/** 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"; } }
private static boolean isInstanceOfSettableOI(ObjectInspector oi) { switch (oi.getCategory()) { case PRIMITIVE: return isInstanceOfSettablePrimitiveOI((PrimitiveObjectInspector) oi); case STRUCT: return oi instanceof SettableStructObjectInspector; case LIST: return oi instanceof SettableListObjectInspector; case MAP: return oi instanceof SettableMapObjectInspector; case UNION: return oi instanceof SettableUnionObjectInspector; default: throw new RuntimeException( "Hive internal error inside isAssignableFromSettableOI : " + oi.getTypeName() + " not supported yet."); } }
// This method is just for experimentation. public void testRead() throws Exception { m_reader = OrcFile.createReader(m_file_path, OrcFile.readerOptions(m_conf)); System.out.println("Reader: " + m_reader); System.out.println("# Rows: " + m_reader.getNumberOfRows()); m_types = m_reader.getTypes(); System.out.println("# Types in the file: " + m_types.size()); for (int i = 0; i < m_types.size(); i++) { System.out.println("Type " + i + ": " + m_types.get(i).getKind()); } System.out.println("Compression: " + m_reader.getCompression()); if (m_reader.getCompression() != CompressionKind.NONE) { System.out.println("Compression size: " + m_reader.getCompressionSize()); } StructObjectInspector m_oi = (StructObjectInspector) m_reader.getObjectInspector(); System.out.println("object inspector type category: " + m_oi.getCategory()); System.out.println("object inspector type name : " + m_oi.getTypeName()); m_fields = m_oi.getAllStructFieldRefs(); System.out.println("Number of columns in the table: " + m_fields.size()); RecordReader m_rr = m_reader.rows(); // Print the type info: for (int i = 0; i < m_fields.size(); i++) { System.out.println("Column " + i + " name: " + m_fields.get(i).getFieldName()); ObjectInspector lv_foi = m_fields.get(i).getFieldObjectInspector(); System.out.println("Column " + i + " type category: " + lv_foi.getCategory()); System.out.println("Column " + i + " type name: " + lv_foi.getTypeName()); // Object lv_column_val = m_oi.getStructFieldData(lv_row, m_fields.get(i)); // System.out.print("Column " + i + " value: " + lv_row.getFieldValue(i)); } OrcStruct lv_row = null; Object lv_field_val = null; StringBuilder lv_row_string = new StringBuilder(1024); while (m_rr.hasNext()) { lv_row = (OrcStruct) m_rr.next(lv_row); lv_row_string.setLength(0); for (int i = 0; i < m_fields.size(); i++) { lv_field_val = lv_row.getFieldValue(i); if (lv_field_val != null) { lv_row_string.append(lv_field_val); } lv_row_string.append('|'); } System.out.println(lv_row_string); } /** * Typecasting to appropriate type based on the 'kind' if (OrcProto.Type.Kind.INT == * m_types.get(1).getKind()) { IntWritable lvf_1_val = (IntWritable) lv_row.getFieldValue(0); * System.out.println("Column 1 value: " + lvf_1_val); } */ }
/** * Compares two types identified by the given object inspectors. This method compares the types as * follows: * * <ol> * <li>If the given inspectors do not belong to same category, the result is negative. * <li>If the given inspectors are for <code>PRIMITIVE</code> type, the result is the comparison * of their type names. * <li>If the given inspectors are for <code>LIST</code> type, then the result is recursive call * to compare the type of list elements. * <li>If the given inspectors are <code>MAP</code> type, then the result is a recursive call to * compare the map key and value types. * <li>If the given inspectors are <code>STRUCT</code> type, then the result is negative if they * do not have the same number of fields. If they do have the same number of fields, the * result is a recursive call to compare each of the field types. * <li>If none of the above, the result is negative. * </ol> * * @param o1 * @param o2 * @return true if the given object inspectors represent the same types. */ public static boolean compareTypes(ObjectInspector o1, ObjectInspector o2) { Category c1 = o1.getCategory(); Category c2 = o2.getCategory(); // Return false if categories are not equal if (!c1.equals(c2)) { return false; } // If both categories are primitive return the comparison of type names. if (c1.equals(Category.PRIMITIVE)) { return o1.getTypeName().equals(o2.getTypeName()); } // If lists, recursively compare the list element types if (c1.equals(Category.LIST)) { ObjectInspector child1 = ((ListObjectInspector) o1).getListElementObjectInspector(); ObjectInspector child2 = ((ListObjectInspector) o2).getListElementObjectInspector(); return compareTypes(child1, child2); } // If maps, recursively compare the key and value types if (c1.equals(Category.MAP)) { MapObjectInspector mapOI1 = (MapObjectInspector) o1; MapObjectInspector mapOI2 = (MapObjectInspector) o2; ObjectInspector childKey1 = mapOI1.getMapKeyObjectInspector(); ObjectInspector childKey2 = mapOI2.getMapKeyObjectInspector(); if (compareTypes(childKey1, childKey2)) { ObjectInspector childVal1 = mapOI1.getMapValueObjectInspector(); ObjectInspector childVal2 = mapOI2.getMapValueObjectInspector(); if (compareTypes(childVal1, childVal2)) { return true; } } return false; } // If structs, recursively compare the fields if (c1.equals(Category.STRUCT)) { StructObjectInspector structOI1 = (StructObjectInspector) o1; StructObjectInspector structOI2 = (StructObjectInspector) o2; List<? extends StructField> childFieldsList1 = structOI1.getAllStructFieldRefs(); List<? extends StructField> childFieldsList2 = structOI2.getAllStructFieldRefs(); if (childFieldsList1 == null && childFieldsList2 == null) { return true; } else if (childFieldsList1 == null || childFieldsList2 == null) { return false; } else if (childFieldsList1.size() != childFieldsList2.size()) { return false; } Iterator<? extends StructField> it1 = childFieldsList1.iterator(); Iterator<? extends StructField> it2 = childFieldsList2.iterator(); while (it1.hasNext()) { StructField field1 = it1.next(); StructField field2 = it2.next(); if (!compareTypes(field1.getFieldObjectInspector(), field2.getFieldObjectInspector())) { return false; } } return true; } if (c1.equals(Category.UNION)) { UnionObjectInspector uoi1 = (UnionObjectInspector) o1; UnionObjectInspector uoi2 = (UnionObjectInspector) o2; List<ObjectInspector> ois1 = uoi1.getObjectInspectors(); List<ObjectInspector> ois2 = uoi2.getObjectInspectors(); if (ois1 == null && ois2 == null) { return true; } else if (ois1 == null || ois2 == null) { return false; } else if (ois1.size() != ois2.size()) { return false; } Iterator<? extends ObjectInspector> it1 = ois1.iterator(); Iterator<? extends ObjectInspector> it2 = ois2.iterator(); while (it1.hasNext()) { if (!compareTypes(it1.next(), it2.next())) { return false; } } return true; } // Unknown category throw new RuntimeException("Unknown category encountered: " + c1); }
public static int hashCode(Object o, ObjectInspector objIns) { if (o == null) { return 0; } switch (objIns.getCategory()) { case PRIMITIVE: { PrimitiveObjectInspector poi = ((PrimitiveObjectInspector) objIns); switch (poi.getPrimitiveCategory()) { case VOID: return 0; case BOOLEAN: return ((BooleanObjectInspector) poi).get(o) ? 1 : 0; case BYTE: return ((ByteObjectInspector) poi).get(o); case SHORT: return ((ShortObjectInspector) poi).get(o); case INT: return ((IntObjectInspector) poi).get(o); case LONG: { long a = ((LongObjectInspector) poi).get(o); return (int) ((a >>> 32) ^ a); } case FLOAT: return Float.floatToIntBits(((FloatObjectInspector) poi).get(o)); case DOUBLE: { // This hash function returns the same result as Double.hashCode() // while DoubleWritable.hashCode returns a different result. long a = Double.doubleToLongBits(((DoubleObjectInspector) poi).get(o)); return (int) ((a >>> 32) ^ a); } case STRING: { // This hash function returns the same result as String.hashCode() when // all characters are ASCII, while Text.hashCode() always returns a // different result. Text t = ((StringObjectInspector) poi).getPrimitiveWritableObject(o); int r = 0; for (int i = 0; i < t.getLength(); i++) { r = r * 31 + t.getBytes()[i]; } return r; } case CHAR: return ((HiveCharObjectInspector) poi).getPrimitiveWritableObject(o).hashCode(); case VARCHAR: return ((HiveVarcharObjectInspector) poi).getPrimitiveWritableObject(o).hashCode(); case BINARY: return ((BinaryObjectInspector) poi).getPrimitiveWritableObject(o).hashCode(); case DATE: return ((DateObjectInspector) poi).getPrimitiveWritableObject(o).hashCode(); case TIMESTAMP: TimestampWritable t = ((TimestampObjectInspector) poi).getPrimitiveWritableObject(o); return t.hashCode(); case INTERVAL_YEAR_MONTH: HiveIntervalYearMonthWritable intervalYearMonth = ((HiveIntervalYearMonthObjectInspector) poi).getPrimitiveWritableObject(o); return intervalYearMonth.hashCode(); case INTERVAL_DAY_TIME: HiveIntervalDayTimeWritable intervalDayTime = ((HiveIntervalDayTimeObjectInspector) poi).getPrimitiveWritableObject(o); return intervalDayTime.hashCode(); case DECIMAL: return ((HiveDecimalObjectInspector) poi).getPrimitiveWritableObject(o).hashCode(); default: { throw new RuntimeException("Unknown type: " + poi.getPrimitiveCategory()); } } } case LIST: { int r = 0; ListObjectInspector listOI = (ListObjectInspector) objIns; ObjectInspector elemOI = listOI.getListElementObjectInspector(); for (int ii = 0; ii < listOI.getListLength(o); ++ii) { r = 31 * r + hashCode(listOI.getListElement(o, ii), elemOI); } return r; } case MAP: { int r = 0; MapObjectInspector mapOI = (MapObjectInspector) objIns; ObjectInspector keyOI = mapOI.getMapKeyObjectInspector(); ObjectInspector valueOI = mapOI.getMapValueObjectInspector(); Map<?, ?> map = mapOI.getMap(o); for (Map.Entry<?, ?> entry : map.entrySet()) { r += hashCode(entry.getKey(), keyOI) ^ hashCode(entry.getValue(), valueOI); } return r; } case STRUCT: int r = 0; StructObjectInspector structOI = (StructObjectInspector) objIns; List<? extends StructField> fields = structOI.getAllStructFieldRefs(); for (StructField field : fields) { r = 31 * r + hashCode( structOI.getStructFieldData(o, field), field.getFieldObjectInspector()); } return r; case UNION: UnionObjectInspector uOI = (UnionObjectInspector) objIns; byte tag = uOI.getTag(o); return hashCode(uOI.getField(o), uOI.getObjectInspectors().get(tag)); default: throw new RuntimeException("Unknown type: " + objIns.getTypeName()); } }