QueryTaskImpl.java

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 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
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 *
 * 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) 2011
 * the Initial Developer. All Rights Reserved.
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 * See @authors listed below
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package org.dcm4chee.archive.query.scp;

import org.dcm4che3.data.Attributes;
import org.dcm4che3.data.Tag;
import org.dcm4che3.data.VR;
import org.dcm4che3.net.Association;
import org.dcm4che3.net.Status;
import org.dcm4che3.net.pdu.PresentationContext;
import org.dcm4che3.net.service.BasicQueryTask;
import org.dcm4che3.net.service.DicomServiceException;
import org.dcm4che3.net.service.QueryRetrieveLevel;
import org.dcm4chee.archive.query.Query;
import org.dcm4chee.archive.query.QueryService;

/**
 * @author Gunter Zeilinger <gunterze@gmail.com>
 * @author Michael Backhaus <michael.backhaus@agfa.com>
 * @author Hesham Elbadawi <bsdreko@gmail.com>
 */
class QueryTaskImpl extends BasicQueryTask {

    private final Query query;
    private final QueryRetrieveLevel modelRootLevel;
    private final QueryService queryService;

    public QueryTaskImpl(Association as, PresentationContext pc, Attributes rq,
            Attributes keys, QueryRetrieveLevel modelRootLevel, Query query,
            QueryService queryService)
            throws Exception {
        super(as, pc, rq, keys); 
        setOptionalKeysNotSupported(query.optionalKeysNotSupported());
        this.query = query;
        this.modelRootLevel = modelRootLevel;
        this.queryService = queryService;
     }

    @Override
    protected Attributes adjust(Attributes match) throws DicomServiceException {
        if (match == null)
            return null;

        // response adjustment (e.g. timezone)
        queryService.coerceResponseAttributes(query.getQueryContext(), match);

        if (modelRootLevel == QueryRetrieveLevel.PATIENT
                && !match.containsValue(Tag.PatientID))
            return null;

        Attributes filtered = new Attributes(match.size());
        filtered.setString(Tag.QueryRetrieveLevel, VR.CS,
                keys.getString(Tag.QueryRetrieveLevel));
        copyAttributes(match, filtered,
                Tag.SpecificCharacterSet,
                Tag.RetrieveAETitle,
                Tag.InstanceAvailability,
                Tag.TimezoneOffsetFromUTC);
        filtered.addSelected(match, keys);
        return filtered;
     }

    private void copyAttributes(Attributes src, Attributes dest, int... tags) {
        VR.Holder vr = new VR.Holder();
        for (int tag : tags) {
            Object value = src.getValue(tag, vr);
            if (value != null)
                dest.setValue(tag, vr.vr, value);
        }
    }

    @Override
    protected void close() {
        query.close();
    }

    @Override
    protected boolean hasMoreMatches() throws DicomServiceException {
        try {
            return query.hasMoreMatches();
        } catch (RuntimeException e) {
            throw new DicomServiceException(Status.UnableToProcess, e);
        }
    }

    @Override
    protected Attributes nextMatch() throws DicomServiceException {
        try {
            return query.nextMatch();
        } catch (RuntimeException e) {
            throw new DicomServiceException(Status.UnableToProcess, e);
        }
    }
}