package com.google.common.collect;

import static com.google.common.collect.MapMakerInternalMap.DRAIN_THRESHOLD;
import static com.google.common.truth.Truth.assertThat;

import com.google.common.base.Equivalence;
import com.google.common.collect.MapMakerInternalMap.InternalEntry;
import com.google.common.collect.MapMakerInternalMap.Segment;
import com.google.common.collect.MapMakerInternalMap.Strength;

package com.google.common.collect;

import static com.google.common.collect.MapMakerInternalMap.DRAIN_THRESHOLD;
import static com.google.common.truth.Truth.assertThat;

import com.google.common.base.Equivalence;
import com.google.common.collect.MapMakerInternalMap.InternalEntry;
import com.google.common.collect.MapMakerInternalMap.Segment;
import com.google.common.collect.MapMakerInternalMap.Strength;

    return setValueStrength(Strength.WEAK);
  }

  /**
   * A dummy singleton value type used by {@link Interners}.
   *
   * <p>{@link MapMakerInternalMap} can optimize for memory usage in this case; see {@link
   * MapMakerInternalMap#createWithDummyValues}.
   */
  enum Dummy {
    VALUE
  }

  @CanIgnoreReturnValue
  MapMaker setValueStrength(Strength strength) {

      public <K extends Comparable<K>, V> Map<K, V> create(Map<K, V> map) {
        // We use a "custom" equivalence to force MapMaker to make a MapMakerInternalMap.
        ConcurrentMap<K, V> newMap = new MapMaker().keyEquivalence(Equivalence.equals()).makeMap();
        checkState(newMap instanceof MapMakerInternalMap);
        newMap.putAll(map);
        return newMap;
      }
    },
    MapMakerStrongKeysWeakValues {
      @Override