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/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.action.admin.indices.segments;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public class IndexSegments implements Iterable {

    private final String index;

    private final Map indexShards;

    IndexSegments(String index, ShardSegments[] shards) {
        this.index = index;

        Map> tmpIndexShards = new HashMap<>();
        for (ShardSegments shard : shards) {
            List lst = tmpIndexShards.get(shard.getShardRouting().id());
            if (lst == null) {
                lst = new ArrayList<>();
                tmpIndexShards.put(shard.getShardRouting().id(), lst);
            }
            lst.add(shard);
        }
        indexShards = new HashMap<>();
        for (Map.Entry> entry : tmpIndexShards.entrySet()) {
            indexShards.put(entry.getKey(), new IndexShardSegments(entry.getValue().get(0).getShardRouting().shardId(), entry.getValue().toArray(new ShardSegments[entry.getValue().size()])));
        }
    }

    public String getIndex() {
        return this.index;
    }

    /**
     * A shard id to index shard segments map (note, index shard segments is the replication shard group that maps
     * to the shard id).
     */
    public Map getShards() {
        return this.indexShards;
    }

    @Override
    public Iterator iterator() {
        return indexShards.values().iterator();
    }
}