content: /*
   * 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.core.metadata.schema.table;
  
  import org.apache.carbondata.core.metadata.datatype.DataType;
  import org.apache.carbondata.core.metadata.datatype.DataTypeDeserializer;
  import org.apache.carbondata.core.metadata.datatype.DataTypes;
  import org.apache.carbondata.core.metadata.schema.table.column.ColumnSchema;
  
  import com.google.gson.Gson;
  import com.google.gson.GsonBuilder;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class ColumnSchemaTest {
  
    @Test
    public void testDataTypeOnColumnSchemaObject() {
      ColumnSchema columnSchema = new ColumnSchema();
      columnSchema.setDataType(DataTypes.createDefaultArrayType());
  
      // without DataTypeDeserializer, after deserialization, data type is main class type instead
      // of child class type
      Gson gson = new Gson();
      String serializedColumnSchema = gson.toJson(columnSchema);
      ColumnSchema newColumnSchema = gson.fromJson(serializedColumnSchema, ColumnSchema.class);
      Assert.assertFalse(newColumnSchema.getDataType().isComplexType());
  
      // using DataTypeDeserializer
      GsonBuilder gsonBuilder = new GsonBuilder();
      gsonBuilder.registerTypeAdapter(DataType.class, new DataTypeDeserializer());
      Gson newGson = gsonBuilder.create();
      ColumnSchema newColumnSchemaObj = newGson.fromJson(serializedColumnSchema, ColumnSchema.class);
      Assert.assertTrue(newColumnSchemaObj.getDataType().isComplexType());
    }
  
  }
  