UseExceptionAwarePage.java

/**
 * Copyright (C) 2011
 *   Michael Mosmann <michael@mosmann.de>
 *   Jan Bernitt <unknown@email.de>
 *
 * with contributions from
 * 	nobody yet
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.flapdoodle.wicket.examples.requests;

import org.apache.wicket.Application;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.request.IRequestHandler;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.request.http.handler.RedirectRequestHandler;
import org.apache.wicket.request.mapper.parameter.PageParameters;

import de.flapdoodle.wicket.request.cycle.exception.Exceptions;
import de.flapdoodle.wicket.request.cycle.exception.listener.IExceptionAwarePage;

public class UseExceptionAwarePage extends WebPage implements IExceptionAwarePage {

	public UseExceptionAwarePage() {
		add(new BadPanel("bad"));
	}

	@Override
	public IRequestHandler onException(RequestCycle cycle, Exception ex) {
		Throwable rootCause = Exceptions.rootCause(ex);
		
		if (rootCause instanceof BadThingHappenException) {
			return new RedirectRequestHandler(urlFor(Application.get().getHomePage(),new PageParameters().add("cause",rootCause.getMessage())).toString());
		}
		return null;
	}
}