Github user QiangCai commented on a diff in the pull request:
https://github.com/apache/incubator-carbondata/pull/672#discussion_r107886267
--- Diff:
integration/hive/src/main/java/org/apache/carbondata/hive/CarbonHiveSerDe.java
---
@@ -0,0 +1,232 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.carbondata.hive;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Properties;
+import javax.annotation.Nullable;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hive.serde.serdeConstants;
+import org.apache.hadoop.hive.serde2.AbstractSerDe;
+import org.apache.hadoop.hive.serde2.SerDeException;
+import org.apache.hadoop.hive.serde2.SerDeSpec;
+import org.apache.hadoop.hive.serde2.SerDeStats;
+import org.apache.hadoop.hive.serde2.io.DoubleWritable;
+import org.apache.hadoop.hive.serde2.io.ShortWritable;
+import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.StructField;
+import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.primitive.DateObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.primitive.DoubleObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.primitive.HiveDecimalObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.primitive.IntObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.primitive.LongObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.primitive.ShortObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.primitive.StringObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.primitive.TimestampObjectInspector;
+import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils;
+import org.apache.hadoop.io.ArrayWritable;
+import org.apache.hadoop.io.IntWritable;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Writable;
+
+
+/**
+ * A serde class for Carbondata.
+ * It transparently passes the object to/from the Carbon file
reader/writer.
+ */
+@SerDeSpec(schemaProps = {serdeConstants.LIST_COLUMNS,
serdeConstants.LIST_COLUMN_TYPES})
+public class CarbonHiveSerDe extends AbstractSerDe {
+ private SerDeStats stats;
+ private ObjectInspector objInspector;
+
+ private enum LAST_OPERATION {
+ SERIALIZE,
+ DESERIALIZE,
+ UNKNOWN
+ }
+
+ private LAST_OPERATION status;
+ private long serializedSize;
+ private long deserializedSize;
+
+ public CarbonHiveSerDe() {
+ stats = new SerDeStats();
+ }
+
+ @Override
+ public void initialize(@Nullable Configuration configuration, Properties
tbl)
+ throws SerDeException {
+
+ final TypeInfo rowTypeInfo;
+ final List<String> columnNames;
+ final List<TypeInfo> columnTypes;
+ // Get column names and sort order
+ final String columnNameProperty =
tbl.getProperty(serdeConstants.LIST_COLUMNS);
+ final String columnTypeProperty =
tbl.getProperty(serdeConstants.LIST_COLUMN_TYPES);
+
+ if (columnNameProperty.length() == 0) {
+ columnNames = new ArrayList<String>();
+ } else {
+ columnNames = Arrays.asList(columnNameProperty.split(","));
+ }
+ if (columnTypeProperty.length() == 0) {
+ columnTypes = new ArrayList<TypeInfo>();
+ } else {
+ columnTypes =
TypeInfoUtils.getTypeInfosFromTypeString(columnTypeProperty);
+ }
+ // Create row related objects
+ rowTypeInfo = TypeInfoFactory.getStructTypeInfo(columnNames,
columnTypes);
+ this.objInspector = new CarbonObjectInspector((StructTypeInfo)
rowTypeInfo);
+
+ // Stats part
+ serializedSize = 0;
+ deserializedSize = 0;
+ status = LAST_OPERATION.UNKNOWN;
+ }
+
+ @Override
+ public Class<? extends Writable> getSerializedClass() {
+ return ArrayWritable.class;
+ }
+
+ @Override
+ public Writable serialize(Object obj, ObjectInspector objectInspector)
throws SerDeException {
+ if
(!objInspector.getCategory().equals(ObjectInspector.Category.STRUCT)) {
+ throw new SerDeException("Cannot serialize " +
objInspector.getCategory()
+ + ". Can only serialize a struct");
+ }
+ serializedSize += ((StructObjectInspector)
objInspector).getAllStructFieldRefs().size();
+ status = LAST_OPERATION.SERIALIZE;
+ ArrayWritable serializeData = createStruct(obj,
(StructObjectInspector) objInspector);
+ return serializeData;
--- End diff --
return createStruct directly.
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