content: /*
   * Copyright 2021 Alibaba Group Holding Limited.
   *
   * Licensed 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.alibaba.graphscope.parallel.message;
  
  import static com.alibaba.graphscope.utils.CppClassName.DOUBLE_MSG;
  import static com.alibaba.graphscope.utils.CppHeaderName.CORE_JAVA_JAVA_MESSAGES_H;
  
  import com.alibaba.fastffi.CXXHead;
  import com.alibaba.fastffi.FFIFactory;
  import com.alibaba.fastffi.FFIGen;
  import com.alibaba.fastffi.FFITypeAlias;
  import com.alibaba.fastffi.FFITypeFactory;
  
  /**
   * DoubleMsg is a java wrapper for <a
   * href="https://github.com/zhanglei1949/GraphScope/blob/main/analytical_engine/core/java/java_messages.h#L33">gs::PrimitiveMessage&lt;double&gt;</a>
   *
   * <p>Grape message manager get message by passing reference, while java passing primitive types or
   * Boxing types in value. So to enabling user passing Long,Double,Int as messages, we provide
   * Wrappers for these primitive types. Feel free to use them in messageManger.
   */
  @FFIGen
  @CXXHead(value = CORE_JAVA_JAVA_MESSAGES_H)
  @FFITypeAlias(value = DOUBLE_MSG)
  public interface DoubleMsg extends MsgBase {
      Factory factory = FFITypeFactory.getFactory(Factory.class, DoubleMsg.class);
  
      double getData();
  
      void setData(double value);
  
      @FFIFactory
      interface Factory {
  
          /**
           * Create an uninitialized DoubleMsg.
           *
           * @return msg instance.
           */
          DoubleMsg create();
          /**
           * Create a DoubleMsg with initial value.
           *
           * @param inData input data.
           * @return msg instance.
           */
          DoubleMsg create(double inData);
      }
  }
  