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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 java.util.function.ToLongFunction;

final class EquivalenceBasedHashFunction implements ToLongFunction {
    private final Equivalence equivalence;

    EquivalenceBasedHashFunction(Equivalence equivalence) {
        this.equivalence = equivalence;
    }

    @Override
    public long applyAsLong(T value) {
        return SmoothieMap.intToLongHashCode(equivalence.hash(value));
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + "{equivalence=" + equivalence + "}";
    }
}