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.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

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;

public class BlurResultIterableSimple implements BlurResultIterable {

  private List<BlurResult> results;
  private Map<String, Long> shardInfo;
  private long skipTo;

  public BlurResultIterableSimple(String shard, List<BlurResult> hits) {
    this.results = hits;
    this.shardInfo = new TreeMap<String, Long>();
    this.shardInfo.put(shard, (long) hits.size());
  }

  @Override
  public Map<String, Long> getShardInfo() {
    return shardInfo;
  }

  @Override
  public long getTotalResults() {
    return results.size();
  }

  @Override
  public void skipTo(long skipTo) {
    this.skipTo = skipTo;
  }

  @Override
  public BlurIterator<BlurResult, BlurException> iterator() throws BlurException {
    long start = 0;
    BlurIterator<BlurResult, BlurException> iterator = BlurUtil.convert(results.iterator());
    while (iterator.hasNext() && start < skipTo) {
      iterator.next();
      start++;
    }
    return iterator;
  }

  @Override
  public void close() throws IOException {
    // do nothing
  }

}