org.jboss.resteasy.plugins.providers
Class FileProvider

java.lang.Object
  extended by org.jboss.resteasy.plugins.providers.FileProvider
All Implemented Interfaces:
MessageBodyReader<File>, MessageBodyWriter<File>

@Provider
public class FileProvider
extends Object
implements MessageBodyReader<File>, MessageBodyWriter<File>

Version:
$Revision: 1 $
Author:
Mark Little

Constructor Summary
FileProvider()
           
 
Method Summary
 long getSize(File o, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
          Called before writeTo to ascertain the length in bytes of the serialized form of t.
 boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
          Ascertain if the MessageBodyReader can produce an instance of a particular type.
 boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
          Ascertain if the MessageBodyWriter supports a particular type.
 File readFrom(Class<File> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String,String> httpHeaders, InputStream entityStream)
          Read a type from the InputStream.
 void writeTo(File uploadFile, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String,Object> httpHeaders, OutputStream entityStream)
          Write a type to an HTTP response.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FileProvider

public FileProvider()
Method Detail

isReadable

public boolean isReadable(Class<?> type,
                          Type genericType,
                          Annotation[] annotations,
                          MediaType mediaType)
Description copied from interface: MessageBodyReader
Ascertain if the MessageBodyReader can produce an instance of a particular type. The type parameter gives the class of the object that should be produced, the genericType parameter gives the java.lang.reflect.Type of the object that should be produced. E.g. if the object to be produced is List, the type parameter will be java.util.List and the genericType parameter will be java.lang.reflect.ParameterizedType.

Specified by:
isReadable in interface MessageBodyReader<File>
Parameters:
type - the class of object to be produced.
genericType - the type of object to be produced. E.g. if the message body is to be converted into a method parameter, this will be the formal type of the method parameter as returned by Method.getGenericParameterTypes.
annotations - an array of the annotations on the declaration of the artifact that will be initialized with the produced instance. E.g. if the message body is to be converted into a method parameter, this will be the annotations on that parameter returned by Method.getParameterAnnotations.
mediaType - the media type of the HTTP entity, if one is not specified in the request then application/octet-stream is used.
Returns:
true if the type is supported, otherwise false.

readFrom

public File readFrom(Class<File> type,
                     Type genericType,
                     Annotation[] annotations,
                     MediaType mediaType,
                     MultivaluedMap<String,String> httpHeaders,
                     InputStream entityStream)
              throws IOException
Description copied from interface: MessageBodyReader
Read a type from the InputStream.

Specified by:
readFrom in interface MessageBodyReader<File>
Parameters:
type - the type that is to be read from the entity stream.
genericType - the type of object to be produced. E.g. if the message body is to be converted into a method parameter, this will be the formal type of the method parameter as returned by Method.getGenericParameterTypes.
annotations - an array of the annotations on the declaration of the artifact that will be initialized with the produced instance. E.g. if the message body is to be converted into a method parameter, this will be the annotations on that parameter returned by Method.getParameterAnnotations.
mediaType - the media type of the HTTP entity.
httpHeaders - the read-only HTTP headers associated with HTTP entity.
entityStream - the InputStream of the HTTP entity. The caller is responsible for ensuring that the input stream ends when the entity has been consumed. The implementation should not close the input stream.
Returns:
the type that was read from the stream.
Throws:
IOException - if an IO error arises

isWriteable

public boolean isWriteable(Class<?> type,
                           Type genericType,
                           Annotation[] annotations,
                           MediaType mediaType)
Description copied from interface: MessageBodyWriter
Ascertain if the MessageBodyWriter supports a particular type.

Specified by:
isWriteable in interface MessageBodyWriter<File>
Parameters:
type - the class of object that is to be written.
genericType - the type of object to be written, obtained either by reflection of a resource method return type or via inspection of the returned instance. GenericEntity provides a way to specify this information at runtime.
annotations - an array of the annotations on the resource method that returns the object.
mediaType - the media type of the HTTP entity.
Returns:
true if the type is supported, otherwise false.

getSize

public long getSize(File o,
                    Class<?> type,
                    Type genericType,
                    Annotation[] annotations,
                    MediaType mediaType)
Description copied from interface: MessageBodyWriter
Called before writeTo to ascertain the length in bytes of the serialized form of t. A non-negative return value is used in a HTTP Content-Length header.

Specified by:
getSize in interface MessageBodyWriter<File>
Parameters:
o - the instance to write
type - the class of object that is to be written.
genericType - the type of object to be written, obtained either by reflection of a resource method return type or by inspection of the returned instance. GenericEntity provides a way to specify this information at runtime.
annotations - an array of the annotations on the resource method that returns the object.
mediaType - the media type of the HTTP entity.
Returns:
length in bytes or -1 if the length cannot be determined in advance

writeTo

public void writeTo(File uploadFile,
                    Class<?> type,
                    Type genericType,
                    Annotation[] annotations,
                    MediaType mediaType,
                    MultivaluedMap<String,Object> httpHeaders,
                    OutputStream entityStream)
             throws IOException
Description copied from interface: MessageBodyWriter
Write a type to an HTTP response. The response header map is mutable but any changes must be made before writing to the output stream since the headers will be flushed prior to writing the response body.

Specified by:
writeTo in interface MessageBodyWriter<File>
Parameters:
uploadFile - the instance to write.
type - the class of object that is to be written.
genericType - the type of object to be written, obtained either by reflection of a resource method return type or by inspection of the returned instance. GenericEntity provides a way to specify this information at runtime.
annotations - an array of the annotations on the resource method that returns the object.
mediaType - the media type of the HTTP entity.
httpHeaders - a mutable map of the HTTP response headers.
entityStream - the OutputStream for the HTTP entity. The implementation should not close the output stream.
Throws:
IOException - if an IO error arises


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