package org.apache.blur.manager.results;

/**
 * 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.
 */

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.apache.blur.thrift.generated.BlurException;
import org.apache.blur.thrift.generated.BlurResult;
import org.apache.blur.utils.BlurIterator;
import org.apache.blur.utils.BlurUtil;
import org.junit.Test;

public class BlurResultPeekableIteratorComparatorTest {

  @Test
  public void testResultPeekableIteratorComparator() throws BlurException {
    List<PeekableIterator<BlurResult, BlurException>> results = new ArrayList<PeekableIterator<BlurResult, BlurException>>();
    results.add(PeekableIterator.wrap(wrap(new ArrayList<BlurResult>(Arrays.asList(newResult("5", 5))).iterator())));
    results.add(PeekableIterator.wrap(wrap(new ArrayList<BlurResult>().iterator())));
    results.add(PeekableIterator.wrap(wrap(new ArrayList<BlurResult>().iterator())));
    results.add(PeekableIterator.wrap(wrap(new ArrayList<BlurResult>(Arrays.asList(newResult("2", 2))).iterator())));
    results.add(PeekableIterator.wrap(wrap(new ArrayList<BlurResult>(Arrays.asList(newResult("1", 1))).iterator())));
    results.add(PeekableIterator.wrap(wrap(new ArrayList<BlurResult>(Arrays.asList(newResult("9", 1))).iterator())));
    results.add(PeekableIterator.wrap(wrap(new ArrayList<BlurResult>().iterator())));

    Collections.sort(results, BlurUtil.HITS_PEEKABLE_ITERATOR_COMPARATOR);

    for (PeekableIterator<BlurResult, BlurException> iterator : results) {
      System.out.println(iterator.peek());
    }
  }

  private BlurIterator<BlurResult, BlurException> wrap(Iterator<BlurResult> iterator) {
    return BlurUtil.convert(iterator);
  }

  private BlurResult newResult(String id, double score) {
    return new BlurResult(id, score, null, null);
  }

}