content: package org.apache.solr.core;
  /**
   * 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.IndexReader;
  import org.apache.lucene.store.Directory;
  import org.apache.solr.common.util.NamedList;
  import org.apache.solr.util.plugin.NamedListInitializedPlugin;
  
  /**
   * Factory used to build a new IndexReader instance.
   */
  public abstract class IndexReaderFactory implements NamedListInitializedPlugin {
    protected int termInfosIndexDivisor = 1;//IndexReader.DEFAULT_TERMS_INDEX_DIVISOR;  Set this once Lucene makes this public.
    /**
     * Potentially initializes {@link #termInfosIndexDivisor}.  Overriding classes should call super.init() in order
     * to make sure termInfosIndexDivisor is set.
     * <p>
     * <code>init</code> will be called just once, immediately after creation.
     * <p>
     * The args are user-level initialization parameters that may be specified
     * when declaring an indexReaderFactory in solrconfig.xml
     *
     */
    public void init(NamedList args) {
      Integer v = (Integer)args.get("setTermIndexDivisor");
      if (v != null) {
        termInfosIndexDivisor = v.intValue();
      }
    }
  
    /**
     *
     * @return The setting of {@link #termInfosIndexDivisor} 
     */
    public int getTermInfosIndexDivisor() {
      return termInfosIndexDivisor;
    }
  
    /**
     * Creates a new IndexReader instance using the given Directory.
     * 
     * @param indexDir indexDir index location
     * @param readOnly return readOnly IndexReader
     * @return An IndexReader instance
     * @throws IOException
     */
    public abstract IndexReader newReader(Directory indexDir, boolean readOnly)
        throws IOException;
  }
  