/*
 * 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.lucene.replicator.nrt;

import java.util.Collections;
import java.util.Map;
import java.util.Set;
import org.apache.lucene.index.SegmentInfos;

/**
 * Holds incRef'd file level details for one point-in-time segment infos on the primary node.
 *
 * @lucene.experimental
 */
public class CopyState {

  public final Map<String, FileMetaData> files;
  public final long version;
  public final long gen;
  public final byte[] infosBytes;
  public final Set<String> completedMergeFiles;
  public final long primaryGen;

  // only non-null on the primary node
  public final SegmentInfos infos;

  public CopyState(
      Map<String, FileMetaData> files,
      long version,
      long gen,
      byte[] infosBytes,
      Set<String> completedMergeFiles,
      long primaryGen,
      SegmentInfos infos) {
    assert completedMergeFiles != null;
    this.files = Collections.unmodifiableMap(files);
    this.version = version;
    this.gen = gen;
    this.infosBytes = infosBytes;
    this.completedMergeFiles = Collections.unmodifiableSet(completedMergeFiles);
    this.primaryGen = primaryGen;
    this.infos = infos;
  }

  @Override
  public String toString() {
    return getClass().getSimpleName() + "(version=" + version + ")";
  }
}
