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.metadata.entities;
  
  import java.util.Objects;
  
  import org.apache.asterix.common.metadata.DataverseName;
  import org.apache.asterix.common.transactions.TxnId;
  import org.apache.asterix.metadata.MetadataCache;
  import org.apache.asterix.metadata.MetadataNode;
  import org.apache.asterix.metadata.api.IMetadataEntity;
  import org.apache.asterix.om.types.BuiltinTypeMap;
  import org.apache.asterix.om.types.IAType;
  import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
  
  /**
   * Metadata describing a datatype.
   */
  public class Datatype implements IMetadataEntity<Datatype> {
  
      private static final long serialVersionUID = 3L;
  
      private final String databaseName;
      private final DataverseName dataverseName;
      private final String datatypeName;
      private final IAType datatype;
      private final boolean isAnonymous;
  
      public Datatype(String databaseName, DataverseName dataverseName, String datatypeName, IAType datatype,
              boolean isAnonymous) {
          this.databaseName = Objects.requireNonNull(databaseName);
          this.dataverseName = dataverseName;
          this.datatypeName = datatypeName;
          this.datatype = datatype;
          this.isAnonymous = isAnonymous;
      }
  
      public String getDatabaseName() {
          return databaseName;
      }
  
      public DataverseName getDataverseName() {
          return dataverseName;
      }
  
      public String getDatatypeName() {
          return datatypeName;
      }
  
      public IAType getDatatype() {
          return datatype;
      }
  
      public boolean getIsAnonymous() {
          return isAnonymous;
      }
  
      @Override
      public Datatype addToCache(MetadataCache cache) {
          return cache.addDatatypeIfNotExists(this);
      }
  
      @Override
      public Datatype dropFromCache(MetadataCache cache) {
          return cache.dropDatatype(this);
      }
  
      public static IAType getTypeFromTypeName(MetadataNode metadataNode, TxnId txnId, String database,
              DataverseName dataverseName, String typeName) throws AlgebricksException {
          IAType type = BuiltinTypeMap.getBuiltinType(typeName);
          if (type == null) {
              Datatype dt = metadataNode.getDatatype(txnId, database, dataverseName, typeName);
              if (dt != null) {
                  type = dt.getDatatype();
              }
          }
          return type;
      }
  }
  