private static <T> JsonCodec<T> getJsonCodecForType(Type type) {
if (VarcharType.VARCHAR.equals(type)) {
return (JsonCodec<T>) JSON_CODEC_FACTORY.jsonCodec(String.class);
}
if (BooleanType.BOOLEAN.equals(type)) {
return (JsonCodec<T>) JSON_CODEC_FACTORY.jsonCodec(Boolean.class);
}
if (BigintType.BIGINT.equals(type)) {
return (JsonCodec<T>) JSON_CODEC_FACTORY.jsonCodec(Long.class);
}
if (DoubleType.DOUBLE.equals(type)) {
return (JsonCodec<T>) JSON_CODEC_FACTORY.jsonCodec(Double.class);
}
if (type instanceof ArrayType) {
Type elementType = ((ArrayType) type).getElementType();
return (JsonCodec<T>) JSON_CODEC_FACTORY.listJsonCodec(getJsonCodecForType(elementType));
}
if (type instanceof MapType) {
Type keyType = ((MapType) type).getKeyType();
Type valueType = ((MapType) type).getValueType();
return (JsonCodec<T>)
JSON_CODEC_FACTORY.mapJsonCodec(getMapKeyType(keyType), getJsonCodecForType(valueType));
}
throw new PrestoException(
INVALID_SESSION_PROPERTY, format("Session property type %s is not supported", type));
}
private static Class<?> getMapKeyType(Type type) {
if (VarcharType.VARCHAR.equals(type)) {
return String.class;
}
if (BooleanType.BOOLEAN.equals(type)) {
return Boolean.class;
}
if (BigintType.BIGINT.equals(type)) {
return Long.class;
}
if (DoubleType.DOUBLE.equals(type)) {
return Double.class;
}
throw new PrestoException(
INVALID_SESSION_PROPERTY,
format("Session property map key type %s is not supported", type));
}
private static Object deserializeSessionProperty(Type type, String value) {
if (value == null) {
throw new PrestoException(INVALID_SESSION_PROPERTY, "Session property can not be null");
}
if (VarcharType.VARCHAR.equals(type)) {
return value;
}
if (BooleanType.BOOLEAN.equals(type)) {
return Boolean.valueOf(value);
}
if (BigintType.BIGINT.equals(type)) {
return Long.valueOf(value);
}
if (DoubleType.DOUBLE.equals(type)) {
return Double.valueOf(value);
}
if (type instanceof ArrayType || type instanceof MapType) {
return getJsonCodecForType(type).fromJson(value);
}
throw new PrestoException(
INVALID_SESSION_PROPERTY, format("Session property type %s is not supported", type));
}