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 com.datastax.dse.driver.api.core.metadata.schema;
  
  import com.datastax.oss.driver.api.core.metadata.schema.KeyspaceMetadata;
  import com.datastax.oss.driver.internal.core.metadata.schema.ScriptBuilder;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import java.util.Map;
  import java.util.Optional;
  
  /**
   * Specialized keyspace metadata, that handles the graph-specific properties introduced in DSE 6.8.
   *
   * <p>This type only exists to avoid breaking binary compatibility. When the driver is connected to
   * a DSE cluster, all the {@link KeyspaceMetadata} instances it returns can be safely downcast to
   * this interface.
   */
  public interface DseGraphKeyspaceMetadata extends DseKeyspaceMetadata {
  
    /** The graph engine that will be used to interpret this keyspace. */
    @NonNull
    Optional<String> getGraphEngine();
  
    @NonNull
    @Override
    default String describe(boolean pretty) {
      ScriptBuilder builder = new ScriptBuilder(pretty);
      if (isVirtual()) {
        builder.append("/* VIRTUAL ");
      } else {
        builder.append("CREATE ");
      }
      builder
          .append("KEYSPACE ")
          .append(getName())
          .append(" WITH replication = { 'class' : '")
          .append(getReplication().get("class"))
          .append("'");
      for (Map.Entry<String, String> entry : getReplication().entrySet()) {
        if (!entry.getKey().equals("class")) {
          builder
              .append(", '")
              .append(entry.getKey())
              .append("': '")
              .append(entry.getValue())
              .append("'");
        }
      }
      builder.append(" } AND durable_writes = ").append(Boolean.toString(isDurableWrites()));
      getGraphEngine()
          .ifPresent(
              graphEngine -> builder.append(" AND graph_engine ='").append(graphEngine).append("'"));
      builder.append(";");
      if (isVirtual()) {
        builder.append(" */");
      }
      return builder.build();
    }
  }
  