/*
 * 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.geode.cache.lucene.internal.cli.functions;

import org.apache.geode.cache.Cache;
import org.apache.geode.cache.CacheFactory;
import org.apache.geode.cache.execute.FunctionAdapter;
import org.apache.geode.cache.execute.FunctionContext;
import org.apache.geode.cache.lucene.LuceneIndex;
import org.apache.geode.cache.lucene.LuceneServiceProvider;
import org.apache.geode.cache.lucene.internal.LuceneIndexCreationProfile;
import org.apache.geode.cache.lucene.internal.LuceneIndexImpl;
import org.apache.geode.cache.lucene.internal.LuceneServiceImpl;
import org.apache.geode.cache.lucene.internal.cli.LuceneIndexDetails;
import org.apache.geode.cache.lucene.internal.cli.LuceneIndexInfo;
import org.apache.geode.internal.InternalEntity;

/**
 * The LuceneDescribeIndexFunction class is a function used to collect the information on a
 * particular lucene index.
 * </p>
 * 
 * @see Cache
 * @see org.apache.geode.cache.execute.Function
 * @see FunctionAdapter
 * @see FunctionContext
 * @see InternalEntity
 * @see LuceneIndexDetails
 * @see LuceneIndexInfo
 */
@SuppressWarnings("unused")
public class LuceneDescribeIndexFunction extends FunctionAdapter implements InternalEntity {

  protected Cache getCache() {
    return CacheFactory.getAnyInstance();
  }

  public String getId() {
    return LuceneDescribeIndexFunction.class.getName();
  }

  public void execute(final FunctionContext context) {
    LuceneIndexDetails result = null;

    final Cache cache = getCache();
    final String serverName = cache.getDistributedSystem().getDistributedMember().getName();
    final LuceneIndexInfo indexInfo = (LuceneIndexInfo) context.getArguments();
    LuceneServiceImpl service = (LuceneServiceImpl) LuceneServiceProvider.get(cache);
    LuceneIndex index = service.getIndex(indexInfo.getIndexName(), indexInfo.getRegionPath());
    LuceneIndexCreationProfile profile =
        service.getDefinedIndex(indexInfo.getIndexName(), indexInfo.getRegionPath());
    if (index != null) {
      result = new LuceneIndexDetails((LuceneIndexImpl) index, serverName);
    } else if (profile != null) {
      result = new LuceneIndexDetails(profile, serverName);
    }
    context.getResultSender().lastResult(result);
  }
}