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package moe.nea.pcj.json;
import moe.nea.pcj.Codec;
import moe.nea.pcj.Result;
public interface JsonCodec<T, Format> extends Codec<
T, Format, JsonLikeOperations<Format>,
JsonLikeError, JsonLikeError> {
default MapCodec<T, Format> fieldOf(String key) {
return new MapCodec<>() {
@Override
public Result<T, JsonLikeError> decode(RecordView<Format> record, JsonLikeOperations<Format> ops) {
return record.get(key)
.map(element -> Result.<T, JsonLikeError>cast(
JsonCodec.this.decode(element, ops)
.mapError(it -> new AtField(key, it))))
.orElseGet(() -> Result.fail(new MissingKey(key)));
}
@Override
public Result<RecordBuilder<Format>, JsonLikeError> encode(T value, JsonLikeOperations<Format> ops) {
var record = ops.createObject();
return Result.<Format, JsonLikeError>cast(JsonCodec.this.encode(value, ops))
.<JsonLikeError>mapError(it -> new AtField(key, it))
.flatMap(json -> Result.cast(record.add(key, json).map(unit -> record)));
}
};
}
}
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