Java tutorial
/** * Copyright 2011 Intuit Inc. All Rights Reserved */ package com.intuit.tank.util; /* * #%L * JSF Support Beans * %% * Copyright (C) 2011 - 2015 Intuit Inc. * %% * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * #L% */ import java.io.Serializable; import javax.inject.Inject; import javax.validation.ConstraintViolation; import javax.validation.ConstraintViolationException; import org.apache.commons.lang.StringUtils; import org.apache.commons.lang.WordUtils; import org.apache.log4j.Logger; import org.jboss.seam.international.status.Messages; /** * RestExceptionHandler * * @author dangleton * */ public class ExceptionHandler implements Serializable { private static final long serialVersionUID = 1L; private static final Logger LOG = Logger.getLogger(ExceptionHandler.class); @Inject private Messages messages; public void handle(Throwable t) { Throwable root = getRoot(t); if (root instanceof ConstraintViolationException) { ConstraintViolationException c = (ConstraintViolationException) root; for (@SuppressWarnings("rawtypes") ConstraintViolation v : c.getConstraintViolations()) { StringBuilder sb = new StringBuilder(); sb.append(WordUtils.capitalize(v.getPropertyPath().iterator().next().getName())); sb.append(' ').append(v.getMessage()).append('.'); messages.error(sb.toString()); } } else if (!StringUtils.isEmpty(root.getMessage())) { messages.error(root.getMessage()); } else { messages.error(root.toString()); } } /** * @param status * @return */ private Throwable getRoot(Throwable t) { while (t.getCause() != null && t.getCause() != t) { t = t.getCause(); } return t; } }