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.alibaba.compileflow.engine.core.definition;
  
  import com.alibaba.compileflow.engine.core.definition.var.HasVar;
  import com.alibaba.compileflow.engine.core.definition.var.IVar;
  
  import java.util.List;
  import java.util.stream.Collectors;
  
  /**
   * @author yusu
   */
  public interface VarSupport extends HasVar {
  
      String VARIABLE_TYPE_PARAM = "param";
  
      String VARIABLE_TYPE_INNER = "inner";
  
      String VARIABLE_TYPE_RETURN = "return";
  
      @Override
      default void addVar(IVar var) {
          getVars().add(var);
      }
  
      default List<IVar> getParamVars() {
          return getVars().stream().filter(var -> VARIABLE_TYPE_PARAM.equals(var.getInOutType()))
                  .collect(Collectors.toList());
      }
  
      default List<IVar> getReturnVars() {
          return getVars().stream().filter(var -> VARIABLE_TYPE_RETURN.equals(var.getInOutType()))
                  .collect(Collectors.toList());
      }
  
      default List<IVar> getInnerVars() {
          return getVars().stream().filter(var -> VARIABLE_TYPE_INNER.equals(var.getInOutType()))
                  .collect(Collectors.toList());
      }
  
      default IVar getReturnVar() {
          return getVars().stream().filter(var -> VARIABLE_TYPE_RETURN.equals(var.getInOutType()))
                  .findFirst().orElse(null);
      }
  
  }
  