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Map implementation with low footprint and no latency spikes

There is a newer version: 2.0.2

/*
 * Copyright (C) The SmoothieMap Authors
 *
 * Licensed 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 io.timeandspace.smoothie;

import io.timeandspace.collect.Equivalence;
import org.checkerframework.checker.nullness.qual.Nullable;

import java.util.function.Supplier;
import java.util.function.ToLongFunction;

import static io.timeandspace.smoothie.ObjectSize.classSizeInBytes;

/**
 * The logic of this class is the same as of {@link SmoothieMapWithCustomKeyAndValueEquivalences}.
 * These classes should be updated in parallel.
 */
final class SmoothieMapWithCustomValueEquivalence extends SmoothieMap {
    private static final long SIZE_IN_BYTES =
            classSizeInBytes(SmoothieMapWithCustomValueEquivalence.class);

    private final Equivalence valueEquivalence;

    SmoothieMapWithCustomValueEquivalence(SmoothieMapBuilder builder) {
        super(builder);
        valueEquivalence = builder.valueEquivalence();
    }

    @Override
    boolean valuesEqual(Object queriedValue, V internalValue) {
        //noinspection unchecked
        return valueEquivalence.equivalent((V) queriedValue, internalValue);
    }

    @Override
    public Equivalence valueEquivalence() {
        return valueEquivalence;
    }

    @Override
    int valueHashCodeForAggregateHashCodes(Object value) {
        //noinspection unchecked
        return valueEquivalence.hash((V) value);
    }

    /** Doesn't account for {@link #valueEquivalence}. */
    @Override
    long smoothieMapClassSizeInBytes() {
        return SIZE_IN_BYTES;
    }
}