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.List;
  import java.util.Objects;
  
  import org.apache.asterix.active.EntityId;
  import org.apache.asterix.common.functions.FunctionSignature;
  import org.apache.asterix.common.metadata.DataverseName;
  import org.apache.asterix.external.util.FeedUtils;
  import org.apache.asterix.metadata.MetadataCache;
  import org.apache.asterix.metadata.api.IMetadataEntity;
  
  /**
   * Feed connection records the feed --> dataset mapping.
   */
  public class FeedConnection implements IMetadataEntity<FeedConnection> {
  
      private static final long serialVersionUID = 3L;
  
      private final EntityId feedId;
      private final String connectionId;
      private final String databaseName;
      private final DataverseName dataverseName;
      private final String feedName;
      private final String datasetName;
      private final String policyName;
      private final String whereClauseBody;
      private final String outputType;
      private final List<FunctionSignature> appliedFunctions;
  
      public FeedConnection(String databaseName, DataverseName dataverseName, String feedName, String datasetName,
              List<FunctionSignature> appliedFunctions, String policyName, String whereClauseBody, String outputType) {
          this.databaseName = Objects.requireNonNull(databaseName);
          this.dataverseName = dataverseName;
          this.feedName = feedName;
          this.datasetName = datasetName;
          this.appliedFunctions = appliedFunctions;
          this.connectionId = feedName + ":" + datasetName;
          this.policyName = policyName;
          this.whereClauseBody = whereClauseBody == null ? "" : whereClauseBody;
          this.outputType = outputType;
          this.feedId = new EntityId(FeedUtils.FEED_EXTENSION_NAME, databaseName, dataverseName, feedName);
      }
  
      public List<FunctionSignature> getAppliedFunctions() {
          return appliedFunctions;
      }
  
      @Override
      public boolean equals(Object other) {
          if (this == other) {
              return true;
          }
          if (!(other instanceof FeedConnection)) {
              return false;
          }
          return ((FeedConnection) other).getConnectionId().equals(connectionId);
      }
  
      @Override
      public int hashCode() {
          return connectionId.hashCode();
      }
  
      @Override
      public FeedConnection addToCache(MetadataCache cache) {
          return null;
      }
  
      @Override
      public FeedConnection dropFromCache(MetadataCache cache) {
          return null;
      }
  
      public String getDatabaseName() {
          return databaseName;
      }
  
      public DataverseName getDataverseName() {
          return dataverseName;
      }
  
      public String getDatasetName() {
          return datasetName;
      }
  
      public String getConnectionId() {
          return connectionId;
      }
  
      public String getFeedName() {
          return feedName;
      }
  
      public String getPolicyName() {
          return policyName;
      }
  
      public String getWhereClauseBody() {
          return whereClauseBody;
      }
  
      public String getOutputType() {
          return outputType;
      }
  
      public EntityId getFeedId() {
          return feedId;
      }
  
      public boolean containsFunction(FunctionSignature signature) {
          return appliedFunctions.contains(signature);
      }
  }
  