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A generic mapper to convert types.

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/*
 * Copyright (c) 2023 Oracle and/or its affiliates.
 *
 * 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.helidon.common.mapper;

import java.util.concurrent.atomic.AtomicReference;

import io.helidon.common.LazyValue;

final class GlobalManager {
    private static final LazyValue DEFAULT_MAPPER = LazyValue.create(() -> MapperManager.builder()
            .useBuiltIn(true)
            .build());
    private static final AtomicReference MANAGER = new AtomicReference<>();

    private GlobalManager() {
    }

    public static void mapperManager(MapperManager manager) {
        MANAGER.set(manager);
    }

    static MapperManager mapperManager() {
        MapperManager mapperManager = MANAGER.get();
        return mapperManager == null ? DEFAULT_MAPPER.get() : mapperManager;
    }
}