Hi Erdinc,
Very nice!
Are you aware of the Module View Controller support in Jersey?
http://blogs.sun.com/sandoz/entry/mvcj
It would be ideal to plug in Freemarker as a TemplateProcessor so one
could do:
@GET
public Viewable get() {
return new Viewable("index", new Index());
}
What you then get it is the ability to scope Freemarker templates per
the resource classes and implicit views, or say intermix different
template technologies.
For a simple example using JSPs see the Bookstore example:
http://download.java.net/maven/2/com/sun/jersey/samples/bookstore/1.0.2/bookstore-1.0.2-project.zip
Would you consider contributing such a Freemarker template processor
support?
Paul.
On Mar 9, 2009, at 7:50 PM, Erdinc Yilmazel wrote:
> If you want to use FreeMarker along with jersey, I wrote a Provider
> for that and I wanted to share it with you. You just need to annotate
> any POJO with @FreeMarkerModel annotation and return an instance of
> that class in your resource methods. The returned bean will be used as
> the model to the FreeMarker template.
>
> Example usage:
>
> @FreeMarkerModel(template="index.html")
> class Index {
> public String getMessage() {
> return "Hello jersey";
> }
> }
>
> @Path("/")
> public class WebPages {
> @GET
> @Produces("text/html")
> public Index getIndex() {
> return new Index();
> }
> }
>
>
> index.html:
> ----------------------------------------------
> <html>
> <body>${message}</body>
> </html>
>
> Here is the code:
> FreeMarkerProvider.java
> -----------------------------------------------
>
> import freemarker.template.Configuration;
> import freemarker.template.DefaultObjectWrapper;
> import freemarker.template.Template;
> import freemarker.template.TemplateException;
>
> import javax.ws.rs.Produces;
> import javax.ws.rs.WebApplicationException;
> import javax.ws.rs.core.MediaType;
> import javax.ws.rs.core.MultivaluedMap;
> import javax.ws.rs.ext.MessageBodyWriter;
> import javax.ws.rs.ext.Provider;
> import java.io.*;
> import java.lang.annotation.Annotation;
> import java.lang.reflect.Type;
> import java.util.Properties;
>
> /**
> * Author: Erdinc YILMAZEL
> * Date: Mar 9, 2009
> * Time: 12:41:20 PM
> */
> @Provider
> @Produces({"text/plain", "text/html"})
> public class FreeMarkerProvider implements MessageBodyWriter<Object> {
>
> String templateBaseDir;
>
> Configuration cfg;
>
> public FreeMarkerProvider() throws IOException {
> InputStream in =
> this.getClass().getClassLoader().getResourceAsStream("/
> templates.properties");
> if (in != null) {
> Properties properties = new Properties();
> try {
> properties.load(in);
> templateBaseDir = (String)
> properties.get("templateBaseDir");
> } catch (IOException e) {
> //
> }
> }
>
> if (templateBaseDir == null) {
> templateBaseDir = "/templates";
> }
>
> cfg = new Configuration();
> cfg.setDirectoryForTemplateLoading(new File(templateBaseDir));
> cfg.setObjectWrapper(new DefaultObjectWrapper());
> }
>
> @Override
> public boolean isWriteable(Class<?> type, Type genericType,
> Annotation[] annotations, MediaType mediaType) {
> return type.isAnnotationPresent(FreeMarkerModel.class);
> }
>
> @Override
> public long getSize(Object o, Class<?> type, Type genericType,
> Annotation[] annotations, MediaType mediaType) {
> return -1;
> }
>
> @Override
> public void writeTo(Object o,
> Class<?> type,
> Type genericType,
> Annotation[] annotations,
> MediaType mediaType,
> MultivaluedMap<String, Object> httpHeaders,
> OutputStream entityStream) throws IOException,
> WebApplicationException {
>
> FreeMarkerModel c = type.getAnnotation(FreeMarkerModel.class);
> if (c != null) {
> httpHeaders.putSingle("Content-Type", mediaType.toString() +
> "; charset=" + c.encoding());
>
> Template temp = cfg.getTemplate(c.template(), c.encoding());
> OutputStreamWriter outputStreamWriter = new
> OutputStreamWriter(entityStream, c.encoding());
> try {
> temp.process(o, outputStreamWriter);
> outputStreamWriter.flush();
> } catch (TemplateException e) {
> e.printStackTrace();
> }
> }
> }
> }
>
> ---------------------------------------
>
> FreeMarkerModel.java
>
> ----------------------------------------
> import java.lang.annotation.Target;
> import java.lang.annotation.ElementType;
> import java.lang.annotation.Retention;
> import java.lang.annotation.RetentionPolicy;
>
> /**
> * Author: Erdinc YILMAZEL
> * Date: Mar 9, 2009
> * Time: 12:39:25 PM
> */
> @Target({ElementType.TYPE})
> @Retention(RetentionPolicy.RUNTIME)
> public @interface FreeMarkerModel {
> String template();
> String encoding() default "UTF-8";
> }
>
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