Module io.helidon.media.common

Package io.helidon.media.common

Class MessageBodyReaderContext

java.lang.Object

io.helidon.media.common.MessageBodyContext

io.helidon.media.common.MessageBodyReaderContext

All Implemented Interfaces:

MessageBodyFilters, MessageBodyReaders

public final class MessageBodyReaderContext
extends MessageBodyContext
implements MessageBodyReaders, MessageBodyFilters

Reader message body context.

See Also:

• MessageBodyReaders
• MessageBodyFilters

Nested Class Summary

Nested classes/interfaces inherited from class io.helidon.media.common.MessageBodyContext

MessageBodyContext.ErrorEvent, MessageBodyContext.Event, MessageBodyContext.EventListener, MessageBodyContext.EventType

Method Summary

Modifier and Type	Method	Description
Charset	charset()	Derive the charset to use from the Content-Type header value or using a default charset as fallback.
Optional<MediaType>	contentType()	Get the Content-Type header.
static MessageBodyReaderContext	create()	Create a new empty reader context backed by empty read-only headers.
static MessageBodyReaderContext	create(MediaContext mediaContext, MessageBodyContext.EventListener eventListener, ReadOnlyParameters headers, Optional<MediaType> contentType)	Create a new empty reader context backed by the specified headers.
static MessageBodyReaderContext	create(MessageBodyReaderContext parent)	Creates a new parented reader context.
static MessageBodyReaderContext	create(MessageBodyReaderContext parent, MessageBodyContext.EventListener eventListener, ReadOnlyParameters headers, Optional<MediaType> contentType)	Create a new empty reader context backed by the specified headers.
ReadOnlyParameters	headers()	Get the underlying headers.
MessageBodyReaderContext	registerReader(MessageBodyReader<?> reader)	Register a reader.
MessageBodyReaderContext	registerReader(MessageBodyStreamReader<?> reader)	Register a stream reader.
<T> void	registerReader(Class<T> type, Reader<T> reader)	Deprecated. since 2.0.0 use registerReader(MessageBodyReader) instead
<T> void	registerReader(Predicate<Class<?>> predicate, Reader<T> reader)	Deprecated. since 2.0.0 use registerReader(MessageBodyReader) instead
<T> Single<T>	unmarshall(Flow.Publisher<DataChunk> payload, GenericType<T> type)	Convert a given HTTP payload into a publisher by selecting a reader that accepts the specified type and current context.
<T> Single<T>	unmarshall(Flow.Publisher<DataChunk> payload, MessageBodyReader<T> reader, GenericType<T> type)	Convert a given HTTP payload into a publisher by selecting a reader with the specified class.
<T> Flow.Publisher<T>	unmarshallStream(Flow.Publisher<DataChunk> payload, GenericType<T> type)	Convert a given HTTP payload into a publisher by selecting a stream reader that accepts the specified type and current context.
<T> Flow.Publisher<T>	unmarshallStream(Flow.Publisher<DataChunk> payload, MessageBodyStreamReader<T> reader, GenericType<T> type)	Convert a given HTTP payload into a publisher by selecting a stream reader with the payload class.

Methods inherited from class io.helidon.media.common.MessageBodyContext

applyFilters, applyFilters, registerFilter

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.helidon.media.common.MessageBodyFilters

registerFilter

Method Details

create

public static MessageBodyReaderContext create()

Create a new empty reader context backed by empty read-only headers. Such reader context is typically the parent context that is used to hold application wide readers and inbound filters.

Returns:

MessageBodyWriterContext

registerReader

public MessageBodyReaderContext registerReader(MessageBodyReader<?> reader)

Description copied from interface: MessageBodyReaders

Register a reader.

Specified by:

registerReader in interface MessageBodyReaders

Parameters:

reader - reader to register

Returns:

Readers

registerReader

public MessageBodyReaderContext registerReader(MessageBodyStreamReader<?> reader)

Description copied from interface: MessageBodyReaders

Register a stream reader.

Specified by:

registerReader in interface MessageBodyReaders

Parameters:

reader - reader to register

Returns:

Readers

registerReader

@Deprecated
public <T> void registerReader(Class<T> type,
 Reader<T> reader)

Deprecated.

since 2.0.0 use registerReader(MessageBodyReader) instead

Register a reader function with the given type.

Type Parameters:

T - supported type

Parameters:

type - class representing the supported type

reader - reader function

registerReader

@Deprecated
public <T> void registerReader(Predicate<Class<?>> predicate,
 Reader<T> reader)

Deprecated.

since 2.0.0 use registerReader(MessageBodyReader) instead

Register a reader function with the type predicate.

Type Parameters:

T - supported type

Parameters:

predicate - class predicate

reader - reader function

unmarshall

public <T> Single<T> unmarshall(Flow.Publisher<DataChunk> payload,
 GenericType<T> type)

Convert a given HTTP payload into a publisher by selecting a reader that accepts the specified type and current context.

Type Parameters:

T - entity type

Parameters:

payload - inbound payload

type - actual representation of the entity type

Returns:

publisher, never null

unmarshall

public <T> Single<T> unmarshall(Flow.Publisher<DataChunk> payload,
 MessageBodyReader<T> reader,
 GenericType<T> type)

Convert a given HTTP payload into a publisher by selecting a reader with the specified class.

Type Parameters:

T - entity type

Parameters:

payload - inbound payload

reader - specific reader

type - actual representation of the entity type

Returns:

publisher, never null

unmarshallStream

public <T> Flow.Publisher<T> unmarshallStream(Flow.Publisher<DataChunk> payload,
 GenericType<T> type)

Convert a given HTTP payload into a publisher by selecting a stream reader that accepts the specified type and current context.

Type Parameters:

T - entity type

Parameters:

payload - inbound payload

type - actual representation of the entity type

Returns:

publisher, never null

unmarshallStream

public <T> Flow.Publisher<T> unmarshallStream(Flow.Publisher<DataChunk> payload,
 MessageBodyStreamReader<T> reader,
 GenericType<T> type)

Convert a given HTTP payload into a publisher by selecting a stream reader with the payload class.

Type Parameters:

T - entity type

Parameters:

payload - inbound payload

reader - specific reader

type - actual representation of the entity type

Returns:

publisher, never null

headers

public ReadOnlyParameters headers()

Get the underlying headers.

Returns:

Parameters, never null

contentType

public Optional<MediaType> contentType()

Get the Content-Type header.

Returns:

Optional, never null

charset

public Charset charset()
                throws IllegalStateException

Description copied from class: MessageBodyContext

Derive the charset to use from the Content-Type header value or using a default charset as fallback.

Specified by:

charset in class MessageBodyContext

Returns:

Charset, never null

Throws:

IllegalStateException - if an error occurs loading the charset specified by the Content-Type header value

create

public static MessageBodyReaderContext create(MessageBodyReaderContext parent)

Creates a new parented reader context.

Parameters:

parent - parent reader context

Returns:

new instance of MessageBodyReaderContext

create

public static MessageBodyReaderContext create(MediaContext mediaContext,
 MessageBodyContext.EventListener eventListener,
 ReadOnlyParameters headers,
 Optional<MediaType> contentType)

Create a new empty reader context backed by the specified headers.

Parameters:

mediaContext - mediaSupport instance used to derived the parent context, may be null

eventListener - subscription event listener, may be null

headers - backing headers, must not be null

contentType - content type, must not be null

Returns:

MessageBodyReaderContext

create

public static MessageBodyReaderContext create(MessageBodyReaderContext parent,
 MessageBodyContext.EventListener eventListener,
 ReadOnlyParameters headers,
 Optional<MediaType> contentType)

Create a new empty reader context backed by the specified headers.

Parameters:

parent - parent context, must not be null

eventListener - subscription event listener, may be null

headers - backing headers, must not be null

contentType - content type, must not be null

Returns:

MessageBodyReaderContext