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.cql3.conditions;
  
  import java.util.List;
  
  import org.apache.cassandra.cql3.QueryOptions;
  import org.apache.cassandra.cql3.functions.Function;
  import org.apache.cassandra.cql3.statements.CQL3CasRequest;
  import org.apache.cassandra.db.Clustering;
  import org.apache.cassandra.schema.ColumnMetadata;
  
  /**
   * Conditions that can be applied to a mutation statement.
   *
   */
  public interface Conditions
  {
      /**
       * An EMPTY condition
       */
      static final Conditions EMPTY_CONDITION = ColumnConditions.newBuilder().build();
  
      /**
       * IF EXISTS condition
       */
      static final Conditions IF_EXISTS_CONDITION = new IfExistsCondition();
  
      /**
       * IF NOT EXISTS condition
       */
      static final Conditions IF_NOT_EXISTS_CONDITION = new IfNotExistsCondition();
  
      /**
       * Adds the functions used by the conditions to the specified list.
       * @param functions the list to add to
       */
      void addFunctionsTo(List<Function> functions);
  
      /**
       * Returns the column definitions to which apply the conditions.
       * @return the column definitions to which apply the conditions.
       */
      Iterable<ColumnMetadata> getColumns();
  
      /**
       * Checks if this <code>Conditions</code> is empty.
       * @return <code>true</code> if this <code>Conditions</code> is empty, <code>false</code> otherwise.
       */
      boolean isEmpty();
  
      /**
       * Checks if this is a IF EXIST condition.
       * @return <code>true</code> if this is a IF EXIST condition, <code>false</code> otherwise.
       */
      boolean isIfExists();
  
      /**
       * Checks if this is a IF NOT EXIST condition.
       * @return <code>true</code> if this is a IF NOT EXIST condition, <code>false</code> otherwise.
       */
      boolean isIfNotExists();
  
      /**
       * Checks if some of the conditions apply to static columns.
       *
       * @return <code>true</code> if some of the conditions apply to static columns, <code>false</code> otherwise.
       */
      boolean appliesToStaticColumns();
  
      /**
       * Checks if some of the conditions apply to regular columns.
       *
       * @return <code>true</code> if some of the conditions apply to regular columns, <code>false</code> otherwise.
       */
      boolean appliesToRegularColumns();
  
      /**
       * Adds the conditions to the specified CAS request.
       *
       * @param request the request
       * @param clustering the clustering prefix
       * @param options the query options
       */
      public void addConditionsTo(CQL3CasRequest request,
                                  Clustering<?> clustering,
                                  QueryOptions options);
  }
  