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An embeddable map server supporting the WMS, WMTS and TMS protocols
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/*
 * Copyright 2009-2010  Geovise BVBA, QMINO BVBA
 *
 * This file is part of GeoLatte Mapserver.
 *
 * GeoLatte Mapserver 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 3 of the License, or
 * (at your option) any later version.
 *
 * GeoLatte Mapserver 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 GeoLatte Mapserver.  If not, see .
 */

package org.geolatte.mapserver.wms;

import net.opengis.wms.v_1_1_1.ServiceException;
import net.opengis.wms.v_1_1_1.ServiceExceptionReport;

import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Karel Maesen, Geovise BVBA
 *         creation-date: Jul 17, 2010
 */
public class WMSServiceException extends Exception {

    public enum CODE {
        InvalidFormat,
        InvalidSRS,
        LayerNotDefined,
        StyleNotDefined,
        LayerNotQueryable,
        CurrentUpdateSequence,
        InvalidUpdateSequence,
        MissingDimensionValue,
        InvalidDimensionValue
    }

    private WMSServiceExceptionList exceptionItems;

    public WMSServiceException(String message) {
        super(message);
    }

    public WMSServiceException(String message, Throwable cause) {
        super(message, cause);
    }

    public WMSServiceException(WMSServiceExceptionList exceptionItems) {
        this.exceptionItems = exceptionItems;
    }


    public void writeToOutputStream(OutputStream outputStream) {
        ServiceExceptionReport report = JAXB.instance().createServiceExceptionReport();
        addExceptions(report);
        JAXB.instance().marshal(report, outputStream);
    }

    public List getCodes() {
        List list = new ArrayList();
        if (this.exceptionItems == null) return list;
        for (WMSServiceExceptionList.Item item : this.exceptionItems) {
            if (item.getCode() != null)
                list.add(item.getCode().toString());
        }
        return list;
    }


    private void addExceptions(ServiceExceptionReport report) {
        if (exceptionItems == null || exceptionItems.isEmpty()) {
            addException(report, getMessage(), null);
        } else {
            for (WMSServiceExceptionList.Item item : exceptionItems) {
                addException(report, item.getMessage(), item.getCode());
            }
        }
    }

    private void addException(ServiceExceptionReport report, String message, CODE code) {
        ServiceException exception = JAXB.instance().createServiceException();
        exception.setvalue(message);
        if (code != null) {
            exception.setCode(code.toString());
        }
        report.getServiceException().add(exception);
    }

}