org.ambraproject.rhino.config.PersistenceAdapter.java Source code

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Here is the source code for org.ambraproject.rhino.config.PersistenceAdapter.java

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/*
 * Copyright (c) 2017 Public Library of Science
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

package org.ambraproject.rhino.config;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import java.util.Arrays;

public interface PersistenceAdapter<M, D> {

    public abstract Class<M> getModelClass();

    public abstract Class<D> getDataClass();

    public abstract D encode(M model);

    public abstract M decode(D data);

    public static <E extends Enum<E>> PersistenceAdapter<E, String> byEnumName(Class<E> enumType) {
        ImmutableMap<String, E> enumsByName = Maps.uniqueIndex(Arrays.asList(enumType.getEnumConstants()), E::name);
        return new PersistenceAdapter<E, String>() {
            @Override
            public Class<E> getModelClass() {
                return enumType;
            }

            @Override
            public Class<String> getDataClass() {
                return String.class;
            }

            @Override
            public String encode(E model) {
                return model.name();
            }

            @Override
            public E decode(String data) {
                return enumsByName.get(data);
            }
        };
    }

}