io.smallrye.graphql.transformation

Interface Transformer<IN,OUT>

Type Parameters:

IN - type used in user-classes, eg LocalDate

OUT - type used by graphql, eg String

All Known Implementing Classes:

CharTransformer, DateTransformer, DurationTransformer, FormattedNumberTransformer, LegacyDateTransformer, NumberTransformer, PassThroughTransformer, PeriodTransformer, UriTransformer, UrlTransformer, UuidTransformer

public interface Transformer<IN,OUT>

Transforms incoming in(Object) and outgoing out(Object) objects to correct types and formats. TODO: Caching?

Field Summary

Fields

Modifier and Type	Field and Description
static CharTransformer	CHAR_TRANSFORMER
static DurationTransformer	DURATION_TRANSFORMER
static PassThroughTransformer	PASS_THROUGH_TRANSFORMER
static PeriodTransformer	PERIOD_TRANSFORMER
static UriTransformer	URI_TRANSFORMER
static UrlTransformer	URL_TRANSFORMER
static UuidTransformer	UUID_TRANSFORMER

Method Summary

Modifier and Type	Method and Description
static Transformer	dateTransformer(Field field)
static Object	in(Field field, Object object)
IN	in(OUT o)
static Object	out(Field field, Object object)
OUT	out(IN o)
static boolean	shouldTransform(Field field) Checks, if this field is a scalar and the object has the wrong type.
static Transformer	transformer(Field field)

Field Detail

PASS_THROUGH_TRANSFORMER

static final PassThroughTransformer PASS_THROUGH_TRANSFORMER

UUID_TRANSFORMER

static final UuidTransformer UUID_TRANSFORMER

URL_TRANSFORMER

static final UrlTransformer URL_TRANSFORMER

URI_TRANSFORMER

static final UriTransformer URI_TRANSFORMER

PERIOD_TRANSFORMER

static final PeriodTransformer PERIOD_TRANSFORMER

DURATION_TRANSFORMER

static final DurationTransformer DURATION_TRANSFORMER

CHAR_TRANSFORMER

static final CharTransformer CHAR_TRANSFORMER

Method Detail

out

static Object out(Field field,
                  Object object)
           throws AbstractDataFetcherException

Throws:

AbstractDataFetcherException

in

static Object in(Field field,
                 Object object)
          throws AbstractDataFetcherException

Throws:

AbstractDataFetcherException

transformer

static Transformer transformer(Field field)

dateTransformer

static Transformer dateTransformer(Field field)

shouldTransform

static boolean shouldTransform(Field field)

Checks, if this field is a scalar and the object has the wrong type. Transformation is only possible for scalars and only needed if types don't match.

Parameters:

field - the field

Returns:

if transformation is needed

in

IN in(OUT o)
throws Exception

Throws:

Exception

out

OUT out(IN o)