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.oss.driver.internal.core.cql;
  
  import com.datastax.oss.driver.api.core.PagingIterable;
  import com.datastax.oss.driver.api.core.cql.AsyncResultSet;
  import com.datastax.oss.driver.api.core.cql.ColumnDefinitions;
  import com.datastax.oss.driver.api.core.cql.ExecutionInfo;
  import com.datastax.oss.driver.api.core.cql.ResultSet;
  import com.datastax.oss.driver.api.core.cql.Row;
  import com.datastax.oss.driver.internal.core.PagingIterableWrapper;
  import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableList;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Spliterator;
  import java.util.function.Function;
  import net.jcip.annotations.NotThreadSafe;
  
  @NotThreadSafe
  public class SinglePageResultSet implements ResultSet {
    private final AsyncResultSet onlyPage;
  
    public SinglePageResultSet(AsyncResultSet onlyPage) {
      this.onlyPage = onlyPage;
      assert !onlyPage.hasMorePages();
    }
  
    @NonNull
    @Override
    public ColumnDefinitions getColumnDefinitions() {
      return onlyPage.getColumnDefinitions();
    }
  
    @NonNull
    @Override
    public ExecutionInfo getExecutionInfo() {
      return onlyPage.getExecutionInfo();
    }
  
    @NonNull
    @Override
    public List<ExecutionInfo> getExecutionInfos() {
      // Assuming this will be called 0 or 1 time, avoid creating the list if it's 0.
      return ImmutableList.of(onlyPage.getExecutionInfo());
    }
  
    @Override
    public boolean isFullyFetched() {
      return true;
    }
  
    @Override
    public int getAvailableWithoutFetching() {
      return onlyPage.remaining();
    }
  
    @NonNull
    @Override
    public Iterator<Row> iterator() {
      return onlyPage.currentPage().iterator();
    }
  
    @NonNull
    @Override
    public Spliterator<Row> spliterator() {
      return PagingIterableSpliterator.builder(this)
          .withEstimatedSize(getAvailableWithoutFetching())
          .build();
    }
  
    @NonNull
    @Override
    public <TargetElementT> PagingIterable<TargetElementT> map(
        Function<? super Row, ? extends TargetElementT> elementMapper) {
      return new PagingIterableWrapper<>(this, elementMapper, true);
    }
  
    @Override
    public boolean wasApplied() {
      return onlyPage.wasApplied();
    }
  }
  