br.com.suricattus.surispring.jsf.exception.PrettyExceptionHandler.java Source code

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Here is the source code for br.com.suricattus.surispring.jsf.exception.PrettyExceptionHandler.java

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/*
 * SURICATTUS
 * Copyright 2011, SURICATTUS CONSULTORIA LTDA, 
 * and individual contributors as indicated by the @authors tag
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package br.com.suricattus.surispring.jsf.exception;

import java.util.Iterator;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.faces.FacesException;
import javax.faces.application.ViewExpiredException;
import javax.faces.context.ExceptionHandlerWrapper;
import javax.faces.context.FacesContext;
import javax.faces.event.ExceptionQueuedEvent;
import javax.persistence.EntityExistsException;
import javax.persistence.EntityNotFoundException;
import javax.persistence.OptimisticLockException;
import javax.transaction.RollbackException;

import org.apache.taglibs.standard.lang.jstl.ELException;
import org.springframework.transaction.UnexpectedRollbackException;

import br.com.suricattus.surispring.jsf.util.FacesUtils;

import com.ocpsoft.pretty.PrettyException;
import com.ocpsoft.pretty.faces.util.FacesMessagesUtils;
import com.sun.faces.context.FacesFileNotFoundException;

/**
 * Pretty Exceptions Handler
 * 
 * @author Lucas Lins
 *
 */
public class PrettyExceptionHandler extends ExceptionHandlerWrapper {

    private final FacesMessagesUtils messagesUtils = new FacesMessagesUtils();
    private final javax.faces.context.ExceptionHandler wrapped;

    private static final Logger logger = Logger.getLogger(PrettyExceptionHandler.class.getName());

    private boolean catched;

    public PrettyExceptionHandler(final javax.faces.context.ExceptionHandler wrapped) {
        this.wrapped = wrapped;
    }

    @Override
    public javax.faces.context.ExceptionHandler getWrapped() {
        return this.wrapped;
    }

    @Override
    public void handle() throws FacesException {
        catched = false;

        for (final Iterator<ExceptionQueuedEvent> it = getUnhandledExceptionQueuedEvents().iterator(); it
                .hasNext();) {
            Throwable t = it.next().getContext().getException();
            while ((t instanceof FacesException || t instanceof ELException
                    || t instanceof UnexpectedRollbackException || t instanceof RollbackException)
                    && t.getCause() != null) {
                t = t.getCause();
            }

            if (handleException(it, t, FacesFileNotFoundException.class,
                    "com.sun.faces.context.FacesFileNotFoundException.message"))
                continue;
            if (handleException(it, t, PrettyException.class, "com.ocpsoft.pretty.PrettyException.message"))
                continue;
            if (handleException(it, t, EntityNotFoundException.class,
                    "javax.persistence.EntityNotFoundException.message"))
                continue;
            if (handleException(it, t, EntityExistsException.class,
                    "javax.persistence.EntityExistsException.message"))
                continue;
            if (handleException(it, t, OptimisticLockException.class,
                    "javax.persistence.OptimisticLockException.message"))
                continue;
            if (handleException(it, t, ViewExpiredException.class,
                    "javax.faces.application.ViewExpiredException.message"))
                continue;
            if (handleException(it, t, Exception.class, "java.lang.Exception.message"))
                continue;

        }
        getWrapped().handle();
    }

    protected boolean handleException(Iterator<ExceptionQueuedEvent> it, Throwable t,
            Class<? extends Throwable> type, String message) {
        if (type.isAssignableFrom(t.getClass())) {
            try {
                if (!catched) {
                    FacesContext facesContext = FacesUtils.getContext();

                    FacesUtils.addMsgErro(message);
                    messagesUtils.saveMessages(facesContext, facesContext.getExternalContext().getSessionMap());

                    facesContext.getApplication().getNavigationHandler().handleNavigation(facesContext, null,
                            "pretty:error");
                    facesContext.renderResponse();

                    return true;
                }
            } finally {
                catched = true;
                logger.log(Level.SEVERE, t.getLocalizedMessage(), t);
                it.remove();
            }
        }
        return false;
    }
}