org.bson.codecs.pojo.LazyPojoCodec Maven / Gradle / Ivy

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The MongoDB Java Driver uber-artifact, containing the legacy driver, the mongodb-driver, mongodb-driver-core, and bson

There is a newer version: 3.12.14

/*
 * Copyright 2008-present MongoDB, Inc.
 *
 * 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.pojo;

import org.bson.BsonReader;
import org.bson.BsonWriter;
import org.bson.codecs.Codec;
import org.bson.codecs.DecoderContext;
import org.bson.codecs.EncoderContext;
import org.bson.codecs.configuration.CodecRegistry;

import java.util.concurrent.ConcurrentMap;

class LazyPojoCodec extends PojoCodec {
    private final ClassModel classModel;
    private final CodecRegistry registry;
    private final PropertyCodecRegistry propertyCodecRegistry;
    private final DiscriminatorLookup discriminatorLookup;
    private final ConcurrentMap, Codec> codecCache;
    private volatile PojoCodecImpl pojoCodec;

    LazyPojoCodec(final ClassModel classModel, final CodecRegistry registry, final PropertyCodecRegistry propertyCodecRegistry,
                  final DiscriminatorLookup discriminatorLookup, final ConcurrentMap, Codec> codecCache) {
        this.classModel = classModel;
        this.registry = registry;
        this.propertyCodecRegistry = propertyCodecRegistry;
        this.discriminatorLookup = discriminatorLookup;
        this.codecCache = codecCache;
    }

    @Override
    public void encode(final BsonWriter writer, final T value, final EncoderContext encoderContext) {
        getPojoCodec().encode(writer, value, encoderContext);
    }

    @Override
    public Class getEncoderClass() {
        return classModel.getType();
    }

    @Override
    public T decode(final BsonReader reader, final DecoderContext decoderContext) {
        return getPojoCodec().decode(reader, decoderContext);
    }

    private Codec getPojoCodec() {
        if (pojoCodec == null) {
            pojoCodec = new PojoCodecImpl(classModel, registry, propertyCodecRegistry, discriminatorLookup, codecCache, true);
        }
        return pojoCodec;
    }

    @Override
    ClassModel getClassModel() {
        return classModel;
    }
}