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.selection;
  
  import java.util.List;
  
  import org.apache.cassandra.cql3.ColumnSpecification;
  import org.apache.cassandra.cql3.QueryOptions;
  import org.apache.cassandra.cql3.functions.Function;
  import org.apache.cassandra.cql3.selection.Selector.Factory;
  import org.apache.cassandra.db.filter.ColumnFilter.Builder;
  import org.apache.cassandra.db.marshal.AbstractType;
  import org.apache.cassandra.exceptions.InvalidRequestException;
  
  /**
   * A <code>Selector.Factory</code> which forwards all its method calls to another factory.
   * Subclasses should override one or more methods to modify the behavior of the backing factory as desired per
   * the decorator pattern.
   */
  abstract class ForwardingFactory extends Factory
  {
      /**
       * Returns the backing delegate instance that methods are forwarded to.
       */
      protected abstract Factory delegate();
  
      public Selector newInstance(QueryOptions options) throws InvalidRequestException
      {
          return delegate().newInstance(options);
      }
  
      protected String getColumnName()
      {
          return delegate().getColumnName();
      }
  
      protected AbstractType<?> getReturnType()
      {
          return delegate().getReturnType();
      }
  
      protected void addColumnMapping(SelectionColumnMapping mapping, ColumnSpecification resultsColumn)
      {
          delegate().addColumnMapping(mapping, resultsColumn);
      }
  
      @Override
      public void addFunctionsTo(List<Function> functions)
      {
          delegate().addFunctionsTo(functions);
      }
  
      @Override
      public boolean isAggregateSelectorFactory()
      {
          return delegate().isAggregateSelectorFactory();
      }
  
      @Override
      public boolean isWritetimeSelectorFactory()
      {
          return delegate().isWritetimeSelectorFactory();
      }
  
      @Override
      public boolean isTTLSelectorFactory()
      {
          return delegate().isTTLSelectorFactory();
      }
  
      @Override
      public boolean isSimpleSelectorFactory()
      {
          return delegate().isSimpleSelectorFactory();
      }
  
      @Override
      public boolean isSimpleSelectorFactoryFor(int index)
      {
          return delegate().isSimpleSelectorFactoryFor(index);
      }
  
      @Override
      boolean areAllFetchedColumnsKnown()
      {
          return delegate().areAllFetchedColumnsKnown();
      }
  
      @Override
      void addFetchedColumns(Builder builder)
      {
          delegate().addFetchedColumns(builder);
      }
  }
  