InstanceQueryTask.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) 2011
 * the Initial Developer. All Rights Reserved.
 *
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 * See @authors listed below
 *
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package org.dcm4che3.tool.dcmqrscp;

import java.io.IOException;

import org.dcm4che3.data.Attributes;
import org.dcm4che3.data.Tag;
import org.dcm4che3.media.DicomDirReader;
import org.dcm4che3.net.Association;
import org.dcm4che3.net.Status;
import org.dcm4che3.net.pdu.PresentationContext;
import org.dcm4che3.net.service.DicomServiceException;
import org.dcm4che3.util.StringUtils;

class InstanceQueryTask extends SeriesQueryTask {

    protected final String[] sopIUIDs;
    protected Attributes instRec;

    public InstanceQueryTask(Association as, PresentationContext pc, Attributes rq, Attributes keys,
            DicomDirReader ddr, String availability) throws DicomServiceException {
        super(as, pc, rq, keys, ddr, availability);
        sopIUIDs = StringUtils.maskNull(keys.getStrings(Tag.SOPInstanceUID));
        wrappedFindNextInstance();
    }

    @Override
    public boolean hasMoreMatches() throws DicomServiceException {
        return instRec != null;
    }

    @Override
    public Attributes nextMatch() throws DicomServiceException {
        Attributes ret = new Attributes(patRec.size()
                + studyRec.size()
                + seriesRec.size()
                + instRec.size());
        ret.addAll(patRec);
        ret.addAll(studyRec);
        ret.addAll(seriesRec);
        ret.addAll(instRec);
        wrappedFindNextInstance();
        return ret;
    }

    private void wrappedFindNextInstance() throws DicomServiceException {
        try {
            findNextInstance();
        } catch (IOException e) {
            throw new DicomServiceException(Status.UnableToProcess, e);
        }
    }

    protected boolean findNextInstance() throws IOException {
        if (seriesRec == null)
            return false;

        if (instRec == null)
            instRec = ddr.findLowerInstanceRecord(seriesRec, true, sopIUIDs);
        else if (sopIUIDs != null && sopIUIDs.length == 1)
            instRec = null;
        else
            instRec = ddr.findNextInstanceRecord(instRec, true, sopIUIDs);

        while (instRec == null && super.findNextSeries())
            instRec = ddr.findLowerInstanceRecord(seriesRec, true, sopIUIDs);

        return instRec != null;
    }
}