com.graphhopper.routing.ev.EnumEncodedValue Maven / Gradle / Ivy

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/*
 *  Licensed to GraphHopper GmbH under one or more contributor
 *  license agreements. See the NOTICE file distributed with this work for
 *  additional information regarding copyright ownership.
 *
 *  GraphHopper GmbH 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 com.graphhopper.routing.ev;

import com.graphhopper.storage.IntsRef;

import java.util.Arrays;

/**
 * This class allows to store distinct values via an enum. I.e. it stores just the indices
 */
public final class EnumEncodedValue extends UnsignedIntEncodedValue {
    private final E[] arr;

    public EnumEncodedValue(String name, Class enumType) {
        this(name, enumType, false);
    }

    public EnumEncodedValue(String name, Class enumType, boolean storeTwoDirections) {
        super(name, 32 - Integer.numberOfLeadingZeros(enumType.getEnumConstants().length - 1), storeTwoDirections);
        arr = enumType.getEnumConstants();
    }

    public E[] getValues() {
        return arr;
    }

    public final void setEnum(boolean reverse, IntsRef ref, E value) {
        int intValue = value.ordinal();
        super.setInt(reverse, ref, intValue);
    }

    public final E getEnum(boolean reverse, IntsRef ref) {
        int value = super.getInt(reverse, ref);
        return arr[value];
    }

    @Override
    public boolean equals(Object o) {
        if (!super.equals(o)) return false;
        EnumEncodedValue that = (EnumEncodedValue) o;
        return Arrays.equals(arr, that.arr);
    }

    @Override
    public int getVersion() {
        return 31 * super.getVersion() + staticHashCode(arr);
    }
}