CustomViewableContext.java

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package org.glassfish.jersey.tests.e2e.server.mvc.provider;

import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.Provider;

import org.glassfish.jersey.server.mvc.Viewable;
import org.glassfish.jersey.server.mvc.internal.TemplateHelper;
import org.glassfish.jersey.server.mvc.spi.ResolvedViewable;
import org.glassfish.jersey.server.mvc.spi.TemplateProcessor;
import org.glassfish.jersey.server.mvc.spi.ViewableContext;

/**
 * Custom {@link ViewableContext viewable context}.
 *
 * @author Michal Gajdos
 */
@Provider
public class CustomViewableContext implements ViewableContext {

    @Override
    public ResolvedViewable resolveViewable(final Viewable viewable, final MediaType mediaType,
                                            final Class<?> resourceClass, final TemplateProcessor templateProcessor) {
        final String path = TemplateHelper.getTemplateName(viewable);
        final Object templateReference = templateProcessor.resolve("/CustomViewableContext/" + path,
                MediaType.TEXT_PLAIN_TYPE);

        if (templateReference != null) {
            return new ResolvedViewable(templateProcessor, templateReference, viewable, MediaType.TEXT_PLAIN_TYPE);
        }

        return null;
    }
}