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.calcite.adapter.hive;
  
  import org.apache.calcite.linq4j.tree.MemberDeclaration;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * collect all declared hive udf instance per sql query,to help
   * {@link HiveEnumerableRelImplementor#addMemberDeclaration(List)}
   * to generate code for a EnumerableRel
   */
  public class HiveUDFInstanceCollecterPerSqlQuery {
  
    private HiveUDFInstanceCollecterPerSqlQuery() {
    }
  
    private static final ThreadLocal<HiveUDFInstanceCollecterPerSqlQuery> LOCAL
        = ThreadLocal
        .withInitial(HiveUDFInstanceCollecterPerSqlQuery::new);
  
    /**
     * get context.
     *
     * @return context
     */
    public static HiveUDFInstanceCollecterPerSqlQuery get() {
      return LOCAL.get();
    }
  
    /**
     * remove context.
     */
    public static void clear() {
      LOCAL.remove();
    }
  
  
    private List<MemberDeclaration> stashedFieldsForHiveUDFInstanceHolder = new
        ArrayList<>();
  
    private int sizeOfHiveUDFInstance = 0;
  
  
    public List<MemberDeclaration> getStashedFieldsForHiveUDFInstanceHolder() {
      return stashedFieldsForHiveUDFInstanceHolder;
    }
  
  
    public int getSizeOfStashedHiveUDFInstance() {
      return sizeOfHiveUDFInstance;
    }
  
    public void incrementSizeOfStashedHiveUDFInstance() {
      sizeOfHiveUDFInstance++;
    }
  
  
  }
  
  // End HiveUDFInstanceCollecterPerSqlQuery.java
  