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Bridges Apache Wicket with Select2 components

There is a newer version: 10.1.1

package org.wicketstuff.select2;

import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;

import org.apache.wicket.WicketRuntimeException;
import org.apache.wicket.request.resource.IResource;
import org.apache.wicket.request.resource.ResourceReference;
import org.apache.wicket.request.resource.ResourceStreamResource;
import org.apache.wicket.util.resource.StringResourceStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * A resource that serves JSON for stateless . You have to mount at application init like. E.g.
 *
 * 
 * 
 * 	mountResource(CATEGORIES_JSON, new JsonResourceReference("categories") {
 *
 * 			private static final long serialVersionUID = 1L;
 *
 * 			protected ChoiceProvider getChoiceProvider() {
 * 				return CategoriesTextChoiceProvider.getInstance();
 * 			}
 * 		});
 *
 * 
 * 
 *
 * and then on component you add
 *
 * 
 *  
 *  	Select2MultiChoice c = new Select2MultiChoice("categories", new PropertyModel<Collection<CategoryTranslation>>(searchBean, "translations"), CategoriesTextChoiceProvider.getInstance());
 *  	c.getSettings().setStateless(true);
 *  	c.getSettings().setMountPath(Application.CATEGORIES_JSON);
 *  
 * 
 *
 * @author Ernesto Reinaldo Barreiro ([email protected]).
 */
public abstract class JsonResourceReference extends ResourceReference
{
	private static final long serialVersionUID = 1L;

	private static Logger logger = LoggerFactory.getLogger(JsonResourceReference.class);

	public JsonResourceReference(String name)
	{
		super(JsonResourceReference.class, name);
	}

	@Override
	public IResource getResource()
	{
		ByteArrayOutputStream webResponse = new ByteArrayOutputStream();
		AbstractSelect2Choice.generateJSON(getChoiceProvider(), webResponse);
		StringResourceStream resourceStream;
		try
		{
			resourceStream = new StringResourceStream(webResponse.toString("UTF-8"), "application/json");
		}
		catch (UnsupportedEncodingException e)
		{
			logger.error("getResource", e);
			throw new WicketRuntimeException(e);
		}
		return new ResourceStreamResource(resourceStream);
	}

	/**
	 * The choice provider.
	 *
	 * @return The ChoiceProvider
	 */
	protected abstract ChoiceProvider getChoiceProvider();

}