001/* ***** BEGIN LICENSE BLOCK *****
002 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
003 *
004 * The contents of this file are subject to the Mozilla Public License Version
005 * 1.1 (the "License"); you may not use this file except in compliance with
006 * the License. You may obtain a copy of the License at
007 * http://www.mozilla.org/MPL/
008 *
009 * Software distributed under the License is distributed on an "AS IS" basis,
010 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
011 * for the specific language governing rights and limitations under the
012 * License.
013 *
014 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
015 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
016 *
017 * The Initial Developer of the Original Code is
018 * Agfa Healthcare.
019 * Portions created by the Initial Developer are Copyright (C) 2011
020 * the Initial Developer. All Rights Reserved.
021 *
022 * Contributor(s):
023 * See @authors listed below
024 *
025 * Alternatively, the contents of this file may be used under the terms of
026 * either the GNU General Public License Version 2 or later (the "GPL"), or
027 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
028 * in which case the provisions of the GPL or the LGPL are applicable instead
029 * of those above. If you wish to allow use of your version of this file only
030 * under the terms of either the GPL or the LGPL, and not to allow others to
031 * use your version of this file under the terms of the MPL, indicate your
032 * decision by deleting the provisions above and replace them with the notice
033 * and other provisions required by the GPL or the LGPL. If you do not delete
034 * the provisions above, a recipient may use your version of this file under
035 * the terms of any one of the MPL, the GPL or the LGPL.
036 *
037 * ***** END LICENSE BLOCK ***** */
038
039package org.dcm4che3.net.service;
040
041import java.io.IOException;
042import java.util.HashMap;
043
044import org.dcm4che3.data.Tag;
045import org.dcm4che3.data.Attributes;
046import org.dcm4che3.net.Association;
047import org.dcm4che3.net.Dimse;
048import org.dcm4che3.net.DimseRQHandler;
049import org.dcm4che3.net.PDVInputStream;
050import org.dcm4che3.net.Status;
051import org.dcm4che3.net.pdu.CommonExtendedNegotiation;
052import org.dcm4che3.net.pdu.PresentationContext;
053
054/**
055 * @author Gunter Zeilinger <gunterze@gmail.com>
056 *
057 */
058public class DicomServiceRegistry implements DimseRQHandler {
059
060    private final HashMap<String, DimseRQHandler> services =
061            new HashMap<String, DimseRQHandler>();
062
063    public void addDicomService(DicomService service) {
064        addDimseRQHandler(service, service.getSOPClasses());
065    }
066
067    public synchronized void addDimseRQHandler(DimseRQHandler service,
068            String... sopClasses) {
069        for (String uid : sopClasses)
070            services.put(uid, service);
071    }
072
073    public void removeDicomService(DicomService service) {
074        removeDimseRQHandler(service.getSOPClasses());
075    }
076
077    public synchronized void removeDimseRQHandler(String... sopClasses) {
078        for (String uid : sopClasses)
079            services.remove(uid);
080    }
081
082    @Override
083    public void onDimseRQ(Association as, PresentationContext pc,
084            Dimse dimse, Attributes cmd, PDVInputStream data) throws IOException {
085        try {
086            lookupService(as, dimse, cmd).onDimseRQ(as, pc, dimse, cmd, data);
087        } catch (DicomServiceException e) {
088            Association.LOG.warn("{}: processing {} failed. Caused by:\t",
089                    as,
090                    dimse.toString(cmd, pc.getPCID(), pc.getTransferSyntax()),
091                    e);
092            Attributes rsp = e.mkRSP(dimse.commandFieldOfRSP(), cmd.getInt(Tag.MessageID, 0));
093            as.tryWriteDimseRSP(pc, rsp, e.getDataset());
094        }
095    }
096
097    private DimseRQHandler lookupService(Association as, Dimse dimse, Attributes cmd)
098            throws DicomServiceException {
099        String cuid = cmd.getString(dimse.tagOfSOPClassUID());
100        if (cuid == null)
101            throw new DicomServiceException(Status.MistypedArgument);
102
103        DimseRQHandler service = services.get(cuid);
104        if (service != null)
105            return service;
106
107        if (dimse == Dimse.C_STORE_RQ) {
108            CommonExtendedNegotiation commonExtNeg = as
109                    .getCommonExtendedNegotiationFor(cuid);
110            if (commonExtNeg != null) {
111                for (String uid : commonExtNeg.getRelatedGeneralSOPClassUIDs()) {
112                    service = services.get(uid);
113                    if (service != null)
114                        return service;
115                }
116                service = services.get(commonExtNeg.getServiceClassUID());
117                if (service != null)
118                    return service;
119            }
120            service = services.get("*");
121            if (service != null)
122                return service;
123        }
124        throw new DicomServiceException(dimse.isCService()
125                ? Status.SOPclassNotSupported
126                : Status.NoSuchSOPclass);
127    }
128
129
130    @Override
131    public void onClose(Association as) {
132        for (DimseRQHandler service : services.values())
133            service.onClose(as);
134    }
135
136}