/*
 * 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.internal.cache;

import org.apache.geode.internal.cache.eviction.EvictionController;

/**
 * Used to produce instances of RegionMap
 *
 * @since GemFire 3.5.1
 *
 *
 */
class RegionMapFactory {
  /**
   * Creates a RegionMap that is stored in the VM.
   *
   * @param owner the region that will be the owner of the map
   * @param attrs attributes used to create the map and its entries
   */
  public static RegionMap createVM(LocalRegion owner, RegionMap.Attributes attrs,
      InternalRegionArguments internalRegionArgs) {
    // final boolean isNotPartitionedRegion = !(owner.getPartitionAttributes() != null || owner
    // .getDataPolicy().withPartitioning());
    if (owner.isProxy() /* || owner instanceof PartitionedRegion */) { // TODO enabling this causes
                                                                       // eviction tests to fail
      return new ProxyRegionMap(owner, attrs, internalRegionArgs);
    } else if (owner.isEntryEvictionPossible()) {
      if (owner instanceof PartitionedRegion) {
        PartitionedRegion pr = (PartitionedRegion) owner;
        EvictionController evctrl = pr.getPREvictionControllerFromDiskInitialization();
        if (evctrl != null) {
          return new VMLRURegionMap(owner, attrs, internalRegionArgs, evctrl);
        }
      }
      return new VMLRURegionMap(owner, attrs, internalRegionArgs);
    } else {
      return new VMRegionMap(owner, attrs, internalRegionArgs);
    }
  }

  /**
   * Creates a RegionMap that is stored in the VM. Called during DiskStore recovery before the
   * region actually exists.
   *
   * @param owner the place holder disk region that will be the owner of the map until the actual
   *        region is created.
   */
  public static RegionMap createVM(PlaceHolderDiskRegion owner, DiskStoreImpl ds,
      InternalRegionArguments internalRegionArgs) {
    RegionMap.Attributes ma = new RegionMap.Attributes();
    ma.statisticsEnabled = owner.getStatisticsEnabled();
    ma.loadFactor = owner.getLoadFactor();
    ma.initialCapacity = owner.getInitialCapacity();
    ma.concurrencyLevel = owner.getConcurrencyLevel();
    if (owner.getLruAlgorithm() != 0) {
      return new VMLRURegionMap(owner, ma, internalRegionArgs);
    } else {
      return new VMRegionMap(owner, ma, internalRegionArgs);
    }
  }
}