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.cassandra;
  
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.db.*;
  import org.apache.cassandra.db.rows.*;
  import org.apache.cassandra.db.partitions.*;
  
  
  /**
   * Convenience object to create updates to a single partition.
   *
   * This is not unlike RowUpdateBuilder except that it allows to create update to multiple rows more easily.
   * It is also aimed at unit tests so favor convenience over efficiency.
   */
  public class UpdateBuilder
  {
      private final PartitionUpdate.SimpleBuilder updateBuilder;
      private Row.SimpleBuilder currentRow;
  
      private UpdateBuilder(PartitionUpdate.SimpleBuilder updateBuilder)
      {
          this.updateBuilder = updateBuilder;
      }
  
      public static UpdateBuilder create(TableMetadata metadata, Object... partitionKey)
      {
          return new UpdateBuilder(PartitionUpdate.simpleBuilder(metadata, partitionKey));
      }
  
      public UpdateBuilder withTimestamp(long timestamp)
      {
          updateBuilder.timestamp(timestamp);
          if (currentRow != null)
              currentRow.timestamp(timestamp);
          return this;
      }
  
      public UpdateBuilder newRow(Object... clustering)
      {
          currentRow = updateBuilder.row(clustering);
          return this;
      }
  
      public UpdateBuilder add(String column, Object value)
      {
          assert currentRow != null;
          currentRow.add(column, value);
          return this;
      }
  
      public PartitionUpdate build()
      {
          return updateBuilder.build();
      }
  
      public IMutation makeMutation()
      {
          Mutation m = updateBuilder.buildAsMutation();
          return updateBuilder.metadata().isCounter()
               ? new CounterMutation(m, ConsistencyLevel.ONE)
               : m;
      }
  
      public void apply()
      {
          makeMutation().apply();
      }
  
      public void applyUnsafe()
      {
          assert !updateBuilder.metadata().isCounter() : "Counters have currently no applyUnsafe() option";
          updateBuilder.buildAsMutation().applyUnsafe();
      }
  }
  