mongo4cats.codecs.IterableCodecProvider.scala Maven / Gradle / Ivy
/*
* Copyright 2020 Kirill5k
*
* 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 mongo4cats.codecs
import com.mongodb.DocumentToDBRefTransformer
import mongo4cats.Clazz
import org.bson.codecs.configuration.CodecProvider
import org.bson.codecs.{BsonTypeClassMap, BsonTypeCodecMap, Codec, DecoderContext, EncoderContext, OverridableUuidRepresentationCodec}
import org.bson.{BsonReader, BsonType, BsonWriter, Transformer, UuidRepresentation}
final private class IterableCodec(
private val registry: CodecRegistry,
private val valueTransformer: Transformer,
private val bsonTypeClassMap: BsonTypeClassMap,
private val uuidRepresentation: UuidRepresentation
) extends Codec[Iterable[Any]] with OverridableUuidRepresentationCodec[Iterable[Any]] {
private val bsonTypeCodecMap: BsonTypeCodecMap = new BsonTypeCodecMap(bsonTypeClassMap, registry)
override def withUuidRepresentation(newUuidRepresentation: UuidRepresentation): Codec[Iterable[Any]] =
new IterableCodec(registry, valueTransformer, bsonTypeClassMap, newUuidRepresentation)
override def encode(writer: BsonWriter, iterable: Iterable[Any], encoderContext: EncoderContext): Unit = {
writer.writeStartArray()
for (value <- iterable)
ContainerValueWriter.write(value, writer, encoderContext, registry)
writer.writeEndArray()
}
override def getEncoderClass: Class[Iterable[Any]] = Clazz.tag[Iterable[Any]]
override def decode(reader: BsonReader, decoderContext: DecoderContext): Iterable[Any] = {
val result = scala.collection.mutable.ListBuffer.empty[Any]
reader.readStartArray()
while (reader.readBsonType() != BsonType.END_OF_DOCUMENT)
result += ContainerValueReader.read(reader, decoderContext, bsonTypeCodecMap, uuidRepresentation, registry, valueTransformer)
reader.readEndArray()
result.toList
}
}
object IterableCodecProvider extends CodecProvider {
override def get[T](clazz: Class[T], registry: CodecRegistry): Codec[T] =
if (classOf[Iterable[Any]].isAssignableFrom(clazz)) {
new IterableCodec(
registry,
new DocumentToDBRefTransformer,
new BsonTypeClassMap(),
UuidRepresentation.STANDARD
).asInstanceOf[Codec[T]]
} else null
}
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