IndexUtil.java

package proj.zoie.api.impl.util;

/**
 * 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 org.apache.lucene.index.SegmentInfoPerCommit;
import org.apache.lucene.index.SegmentInfos;
import org.apache.lucene.store.Directory;

public class IndexUtil {
  private IndexUtil() {
  }

  public static int getNumSegments(Directory idx) throws IOException {
    SegmentInfos infos = new SegmentInfos();
    infos.read(idx);
    return infos.size();
  }

  public static String getSegmentsInfo(Directory idx) {
    SegmentInfos infos = new SegmentInfos();
    try {
      infos.read(idx);
      StringBuilder buf = new StringBuilder();
      for (int i = 0; i < infos.size(); i++) {
        SegmentInfoPerCommit segInfo = infos.info(i);
        buf.append("[").append(segInfo.info.name).append(",numDoc:").append(segInfo.info.getDocCount())
            .append(",numDel:").append(segInfo.getDelCount()).append("]");
      }
      return buf.toString();
    } catch (Exception e) {
      return e.toString();
    }
  }
}