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/*
 * Copyright 2008-present MongoDB, Inc.
 * Copyright 2018 Cezary Bartosiak
 *
 * 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 org.bson.codecs.jsr310;

import org.bson.codecs.Codec;
import org.bson.codecs.configuration.CodecProvider;
import org.bson.codecs.configuration.CodecRegistry;

import java.util.HashMap;
import java.util.Map;

/**
 * A CodecProvider for JSR-310 Date and Time API classes.
 *
 * 
 * Supplies the following JSR-310 based Codecs:
 * 

 * {@link InstantCodec}
 * 
{@link LocalDateCodec}
 * 
{@link LocalDateTimeCodec}
 * 
{@link LocalTimeCodec}
 * 
 * Requires Java 8 or greater.
 *
 * @since 3.7
 */
public class Jsr310CodecProvider implements CodecProvider {
    private static final Map, Codec> JSR310_CODEC_MAP = new HashMap, Codec>();
    static {
        try {
            Class.forName("java.time.Instant"); // JSR-310 support canary test.
            putCodec(new InstantCodec());
            putCodec(new LocalDateCodec());
            putCodec(new LocalDateTimeCodec());
            putCodec(new LocalTimeCodec());
        } catch (ClassNotFoundException e) {
            // No JSR-310 support
        }
    }

    private static void putCodec(final Codec codec) {
        JSR310_CODEC_MAP.put(codec.getEncoderClass(), codec);
    }

    @SuppressWarnings("unchecked")
    @Override
    public  Codec get(final Class clazz, final CodecRegistry registry) {
        return (Codec) JSR310_CODEC_MAP.get(clazz);
    }
}