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.calcite.avatica.util;
  
  import org.apache.calcite.avatica.ColumnMetaData;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.Iterator;
  import java.util.List;
  import java.util.stream.Collectors;
  
  /**
   * Utilities methods for creating cursors from data for tests of the util package.
   */
  public class CursorTestUtils {
  
    private CursorTestUtils() {
      // private constructor
    }
  
    static ListIteratorCursor createListBasedCursor(List<List<Object>> rowsValues) {
      Iterator<List<Object>> iterator = rowsValues.stream()
          .map(a -> (Object) a)
          .map(Collections::singletonList)
          .collect(Collectors.toList())
          .iterator();
      return new ListIteratorCursor(iterator);
    }
  
    static ArrayIteratorCursor createArrayBasedCursor(List<List<Object>> rowsValues) {
      Iterator<Object[]> iterator = Arrays.stream(rowsValues.toArray())
          .map(x -> Collections.singletonList(x).toArray())
          .iterator();
      return new ArrayIteratorCursor(iterator);
    }
  
    static ListIteratorCursor createArrayImplBasedCursor(
        List<List<Object>> rowsValues, ColumnMetaData.ScalarType arrayComponentType,
        ArrayImpl.Factory factory) {
      Iterator<List<Object>> iterator = rowsValues.stream()
          .map(vals -> factory.createArray(arrayComponentType, vals))
          .map(a -> (Object) a)
          .map(Collections::singletonList)
          .collect(Collectors.toList())
          .iterator();
      return new ListIteratorCursor(iterator);
    }
  }
  
  // End CursorTestUtils.java
  