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 com.datastax.dse.driver.internal.core.graph.binary;
  
  import com.datastax.oss.driver.api.core.data.UdtValue;
  import com.datastax.oss.driver.api.core.type.DataType;
  import com.datastax.oss.driver.api.core.type.UserDefinedType;
  import com.datastax.oss.driver.internal.core.context.DefaultDriverContext;
  import java.io.IOException;
  import org.apache.tinkerpop.gremlin.structure.io.Buffer;
  import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryReader;
  import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter;
  
  public class UdtValueSerializer extends AbstractDynamicGraphBinaryCustomSerializer<UdtValue> {
    private final DefaultDriverContext driverContext;
  
    public UdtValueSerializer(DefaultDriverContext driverContext) {
      this.driverContext = driverContext;
    }
  
    @Override
    public String getTypeName() {
      return GraphBinaryModule.GRAPH_BINARY_UDT_VALUE_TYPE_NAME;
    }
  
    @Override
    public UdtValue readDynamicCustomValue(Buffer buffer, GraphBinaryReader context)
        throws IOException {
      // read type definition first
      DataType driverType = ComplexTypeSerializerUtil.decodeTypeDefinition(buffer, driverContext);
  
      assert driverType instanceof UserDefinedType
          : "GraphBinary UdtValue deserializer was called on a value that is not encoded as a UdtValue.";
  
      UserDefinedType userDefinedType = (UserDefinedType) driverType;
      UdtValue value = userDefinedType.newValue();
  
      // then read values
      return ComplexTypeSerializerUtil.decodeValue(
          buffer, value, userDefinedType.getFieldTypes().size());
    }
  
    @Override
    public void writeDynamicCustomValue(UdtValue value, Buffer buffer, GraphBinaryWriter context)
        throws IOException {
      // write type first in native protocol format
      ComplexTypeSerializerUtil.encodeTypeDefinition(value.getType(), buffer, driverContext);
      // write value after
      ComplexTypeSerializerUtil.encodeValue(value, buffer);
    }
  }
  