ClickableGrowlRenderer.java

package de.openknowledge.component;

import java.io.IOException;
import java.util.Iterator;

import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.FacesRenderer;

import org.primefaces.component.growl.Growl;
import org.primefaces.component.growl.GrowlRenderer;

/**
 * Bartug Bölükemini - open knowledge GmbH
 */
@FacesRenderer(
   componentFamily = "org.primefaces.component",
   rendererType = "org.primefaces.component.growl.GrowlRenderer"
)
public class ClickableGrowlRenderer extends GrowlRenderer {

   @Override
   protected void encodeMessages(FacesContext context, Growl growl) throws IOException {
      ResponseWriter writer = context.getResponseWriter();
      String forGrowl = growl.getFor();
      Iterator<FacesMessage> messages;
      if (forGrowl != null) {
         messages = context.getMessages(forGrowl);
      } else {
         messages = growl.isGlobalOnly() ? context.getMessages(null) : context.getMessages();
      }

      writer.write("[");

      while (messages.hasNext()) {
         FacesMessage message = messages.next();
         String severityName = getSeverityName(message);

         if (shouldRender(growl, message, severityName)) {
            String summary = escapeText(message.getSummary());
            String detail = escapeText(message.getDetail());

            writer.write("{");

            extendMessages(context, growl, writer, message, summary, detail);

            writer.write(",severity:'" + severityName + "'");

            writer.write("}");

            if (messages.hasNext()) {
               writer.write(",");
            }

            message.rendered();
         }
      }

      writer.write("]");
   }

   private void extendMessages(FacesContext context, Growl growl, ResponseWriter writer, FacesMessage message,
                               String summary, String detail) throws IOException {
      if (growl.isShowSummary() && growl.isShowDetail()) {
         writer.writeText(
            "id:\"" + getClientId(message, context) + "\",summary:\"" + summary + "\",detail:\"" + detail + "\"",
            null);
      } else if (growl.isShowSummary() && !growl.isShowDetail()) {
         writer.writeText("id:\"" + getClientId(message, context) + "\",summary:\"" + summary + "\",detail:\"\"",
            null);
      } else if (!growl.isShowSummary() && growl.isShowDetail()) {
         writer.writeText("id:\"" + getClientId(message, context) + "\",summary:\"\",detail:\"" + detail + "\"",
            null);
      }
   }

   private String getClientId(FacesMessage message, FacesContext context) {
      for (Iterator<String> i = context.getClientIdsWithMessages(); i.hasNext();) {
         String clientId = i.next();
         if (context.getMessageList(clientId).contains(message)) {
            return clientId;
         }
      }
      return null;
   }
}