ConfigExceptionHandler.java

/*
 * **** BEGIN LICENSE BLOCK *****
 *  Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 *  The contents of this file are subject to the Mozilla Public License Version
 *  1.1 (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.mozilla.org/MPL/
 *
 *  Software distributed under the License is distributed on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 *  for the specific language governing rights and limitations under the
 *  License.
 *
 *  The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 *  Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 *  The Initial Developer of the Original Code is
 *  Agfa Healthcare.
 *  Portions created by the Initial Developer are Copyright (C) 2015
 *  the Initial Developer. All Rights Reserved.
 *
 *  Contributor(s):
 *  See @authors listed below
 *
 *  Alternatively, the contents of this file may be used under the terms of
 *  either the GNU General Public License Version 2 or later (the "GPL"), or
 *  the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 *  in which case the provisions of the GPL or the LGPL are applicable instead
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 */
package org.dcm4chee.conf.browser;

import org.dcm4che3.conf.core.api.ConfigurationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Roman K
 */
@Provider
public class ConfigExceptionHandler implements ExceptionMapper<Exception>
{
    public static final Logger log = LoggerFactory.getLogger(ConfigExceptionHandler.class);

    @Override
    @Produces({ MediaType.APPLICATION_JSON })
    public Response toResponse(Exception exception)
    {
        log.info("A problem in Configuration GUI", exception);
        return Response.status(Response.Status.BAD_REQUEST).entity(getNiceErrorMessageList(exception)).build();
    }

    private List<String> getNiceErrorMessageList(Throwable e) {
        List<String> l = new ArrayList<>();
        boolean first = true;
        while (e != null) {
            l.add(e.getMessage());
            e = e.getCause();
        }
        return l;
    }

}