org.apache.openjpa.persistence.jest

Interface ObjectFormatter<T>

Type Parameters:

T - the type of encoded output

All Known Implementing Classes:

JSONObjectFormatter, XMLFormatter

public interface ObjectFormatter<T>

A parameterized interface defines the protocol for converting managed persistence instances or a persistent domain model into a form suitable for transport to a language-neutral client such as an web browser.

The interface prefers that the resultant resource as a complete representation i.e. all the references contained in the resource can be resolved within the same resource itself. As the intended recipient of this resource is a remote client, an incomplete resource will require the client to request further for any (unresolved) reference resulting in a chatty protocol.

This interface also defines methods for writing the representation into an output stream e.g. response output stream of a HTTP Servlet.

Implementation Note: Each concrete formatter type is registered with factory that requires the implementation to have a no-argument constructor.

Author:

Pinaki Poddar

Field Summary

Fields

Modifier and Type	Field and Description
static SimpleDateFormat	dateFormat

Method Summary

Methods

Modifier and Type	Method and Description
T	encode(Collection<OpenJPAStateManager> objs, Metamodel model) Encode the persistent closure of the given collection of managed instances as a resource e.g a XML or HTML document or an interactive document with JavaScript or a JSON array.
T	encode(Metamodel model) Encode the given domain model in to a object.
String	getMimeType() Gets the mime type produced by this formatter.
T	writeOut(Collection<OpenJPAStateManager> objs, Metamodel model, String title, String desc, String uri, OutputStream out) Encodes the persistent closure of the given collection of objects, then write it into the given output stream.
T	writeOut(Metamodel model, String title, String desc, String uri, OutputStream out) Encodes the given domain model, then write it into the given output stream.

Field Detail

dateFormat

static final SimpleDateFormat dateFormat

Method Detail

getMimeType

String getMimeType()

Gets the mime type produced by this formatter.

encode

T encode(Collection<OpenJPAStateManager> objs,
       Metamodel model)

Encode the persistent closure of the given collection of managed instances as a resource e.g a XML or HTML document or an interactive document with JavaScript or a JSON array. Exact nature of the output type is the generic parameter of this interface.

Parameters:

objs - a collection of managed instances

model - domain model

Returns:

an encoded object e.g. a XML or HTML Document or a JSON object.

encode

T encode(Metamodel model)

Encode the given domain model in to a object.

Parameters:

model - a meta-model of managed types

Returns:

an encoded object e.g. a XML or HTML Document or a JSON object.

writeOut

T writeOut(Collection<OpenJPAStateManager> objs,
         Metamodel model,
         String title,
         String desc,
         String uri,
         OutputStream out)
           throws IOException

Encodes the persistent closure of the given collection of objects, then write it into the given output stream.

Parameters:

objs - the collection of objects to be formatted.

model - a meta-model of managed types, provided for easier introspection if necessary

title - TODO

desc - TODO

uri - TODO

writer - a text-oriented output stream

Throws:

IOException

writeOut

T writeOut(Metamodel model,
         String title,
         String desc,
         String uri,
         OutputStream out)
           throws IOException

Encodes the given domain model, then write it into the given output stream.

Parameters:

model - a meta-model of managed types

writer - a text-oriented output stream

Throws:

IOException