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.elasticsearch;
  
  import org.apache.calcite.linq4j.tree.Types;
  
  import com.google.common.collect.ImmutableMap;
  
  import java.lang.reflect.Method;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Builtin methods in the Elasticsearch adapter.
   */
  enum ElasticsearchMethod {
  
    ELASTICSEARCH_QUERYABLE_FIND(ElasticsearchTable.ElasticsearchQueryable.class,
        "find",
        List.class, // ops  - projections and other stuff
        List.class, // fields
        List.class, // sort
        List.class, // nulls sort
        List.class, // groupBy
        List.class, // aggregations
        Map.class, // item to expression mapping. Eg. _MAP['a.b.c'] and EXPR$1
        Long.class, // offset
        Long.class); // fetch
  
    @SuppressWarnings("ImmutableEnumChecker")
    public final Method method;
  
    public static final ImmutableMap<Method, ElasticsearchMethod> MAP;
  
    static {
      final ImmutableMap.Builder<Method, ElasticsearchMethod> builder = ImmutableMap.builder();
      for (ElasticsearchMethod value : ElasticsearchMethod.values()) {
        builder.put(value.method, value);
      }
      MAP = builder.build();
    }
  
    ElasticsearchMethod(Class clazz, String methodName, Class... argumentTypes) {
      this.method = Types.lookupMethod(clazz, methodName, argumentTypes);
    }
  }
  