HL7toDicom.java

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 * for the specific language governing rights and limitations under the
 * License.
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 * 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) 2012
 * the Initial Developer. All Rights Reserved.
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 * See @authors listed below
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package org.dcm4chee.archive.hl7;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

import javax.xml.transform.Templates;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;

import org.dcm4che3.data.Attributes;
import org.dcm4che3.data.Tag;
import org.dcm4che3.data.VR;
import org.dcm4che3.hl7.HL7Charset;
import org.dcm4che3.hl7.HL7Parser;
import org.dcm4che3.io.ContentHandlerAdapter;
import org.xml.sax.SAXException;

/**
 * @author Gunter Zeilinger <gunterze@gmail.com>
 */
abstract class HL7toDicom {

    private static SAXTransformerFactory factory =
            (SAXTransformerFactory) TransformerFactory.newInstance();

    public static Attributes transform(Templates tpl,
            byte[] msg, int off, int len, String hl7charset)
            throws TransformerConfigurationException, IOException, SAXException {
        Attributes attrs = new Attributes();
        String dicomCharset = HL7Charset.toDicomCharacterSetCode(hl7charset);
        if (dicomCharset != null)
            attrs.setString(Tag.SpecificCharacterSet, VR.CS, dicomCharset);
        TransformerHandler th = factory.newTransformerHandler(tpl);
        th.setResult(new SAXResult(new ContentHandlerAdapter(attrs)));
        new HL7Parser(th).parse(new InputStreamReader(
                new ByteArrayInputStream(msg, off, len),
                HL7Charset.toCharsetName(hl7charset)));
        return attrs;
    }
}