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.asterix.om.pointables.base;
  
  import org.apache.asterix.om.types.AOrderedListType;
  import org.apache.asterix.om.types.ARecordType;
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.asterix.om.types.AUnorderedListType;
  import org.apache.asterix.om.types.BuiltinType;
  import org.apache.asterix.om.types.IAType;
  
  /**
   * This class serves as the repository for the default record type and list type
   * fields in the open part, e.g., a "record" (nested) field in the open part is
   * always a fully open one, and a "list" field in the open part is always a list
   * of "ANY".
   */
  public class DefaultOpenFieldType {
  
      // nested open field rec type
      public static ARecordType NESTED_OPEN_RECORD_TYPE;
  
      static {
          NESTED_OPEN_RECORD_TYPE = new ARecordType("nested-open", new String[] {}, new IAType[] {}, true);
      }
  
      // nested open list type
      public static AOrderedListType NESTED_OPEN_AORDERED_LIST_TYPE =
              new AOrderedListType(BuiltinType.ANY, "nested-ordered-list");
  
      // nested open list type
      public static AUnorderedListType NESTED_OPEN_AUNORDERED_LIST_TYPE =
              new AUnorderedListType(BuiltinType.ANY, "nested-unordered-list");
  
      public static IAType getDefaultOpenFieldType(ATypeTag tag) {
          if (tag.equals(ATypeTag.OBJECT))
              return NESTED_OPEN_RECORD_TYPE;
          if (tag.equals(ATypeTag.ARRAY))
              return NESTED_OPEN_AORDERED_LIST_TYPE;
          if (tag.equals(ATypeTag.MULTISET))
              return NESTED_OPEN_AUNORDERED_LIST_TYPE;
          else
              return null;
      }
  
  }
  