Parsers

REST resources use the {@link oaj.parser.Parser} API for defining parsers for parsing request body content and converting them into POJOs.

The servlet will pick which parser to use by matching the request Content-Type header with the media types defined through the {@link oaj.parser.Parser#getMediaTypes()} method.

Parsers can be associated with REST servlets in the following ways:

- {@link oajr.annotation.RestResource#parsers()} - Annotation on resource Java class.
- {@link oajr.annotation.RestMethod#parsers()} - Annotation on resource Java method.
- {@link oajr.RestContextBuilder#parsers(Class[])} - Programmatic.

The following are all equivalent ways of defining parsers used by a resource:

// Option #1 - Defined via annotation. @RestResource(parsers={JsonParser.class, XmlParser.class}) public class MyResource { // Option #2 - Defined via builder passed in through resource constructor. public MyResource(RestContextBuilder builder) throws Exception { // Using method on builder. builder.parsers(JsonParser.class, XmlParser.class); // Same, but use pre-instantiated parsers. builder.parsers(JsonParser.DEFAULT, XmlParser.DEFAULT); // Same, but using property. builder.set(REST_parsers, JsonParser.class, XmlParser.class); } // Option #3 - Defined via builder passed in through init method. @RestHook(INIT) public void init(RestContextBuilder builder) throws Exception { builder.parsers(JsonParser.class, XmlParser.class); } // Override at the method level. @RestMethod(parsers={HtmlParser.class}) public Object myMethod(@Body MyPojo myPojo) { // Do something with your parsed POJO. } }

##### See Also:

- {@link oajr.RestContext#REST_parsers}