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.lang.common.statement;
  
  import org.apache.asterix.common.exceptions.CompilationException;
  import org.apache.asterix.common.metadata.DataverseName;
  import org.apache.asterix.common.metadata.Namespace;
  import org.apache.asterix.lang.common.base.AbstractStatement;
  import org.apache.asterix.lang.common.base.Statement;
  import org.apache.asterix.lang.common.struct.Identifier;
  import org.apache.asterix.lang.common.visitor.base.ILangVisitor;
  import org.apache.hyracks.algebricks.common.utils.Pair;
  
  public class DisconnectFeedStatement extends AbstractStatement {
  
      private final Namespace namespace;
      private final Identifier feedName;
      private final Identifier datasetName;
  
      public DisconnectFeedStatement(Pair<Namespace, Identifier> feedNameComponent,
              Pair<Namespace, Identifier> datasetNameComponent) {
          if (feedNameComponent.first != null && datasetNameComponent.first != null
                  && !feedNameComponent.first.equals(datasetNameComponent.first)) {
              throw new IllegalArgumentException("Dataverse for source feed and target dataset do not match");
          }
          this.namespace = feedNameComponent.first != null ? feedNameComponent.first : datasetNameComponent.first;
          this.datasetName = datasetNameComponent.second;
          this.feedName = feedNameComponent.second;
      }
  
      public Namespace getNamespace() {
          return namespace;
      }
  
      public DataverseName getDataverseName() {
          return namespace == null ? null : namespace.getDataverseName();
      }
  
      public Identifier getFeedName() {
          return feedName;
      }
  
      public Identifier getDatasetName() {
          return datasetName;
      }
  
      @Override
      public Kind getKind() {
          return Statement.Kind.DISCONNECT_FEED;
      }
  
      @Override
      public <R, T> R accept(ILangVisitor<R, T> visitor, T arg) throws CompilationException {
          return visitor.visit(this, arg);
      }
  
      @Override
      public String toString() {
          return "disconnect feed " + feedName + " from " + datasetName;
      }
  
      @Override
      public byte getCategory() {
          return Category.UPDATE;
      }
  
  }
  