CodeServiceEJB.java

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
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 * the License. You may obtain a copy of the License at
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 * for the specific language governing rights and limitations under the
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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.
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 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
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 * See @authors listed below
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package org.dcm4chee.archive.code.impl;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;

import org.dcm4chee.archive.code.CodeService;
import org.dcm4chee.archive.entity.Code;

/**
 * @author Gunter Zeilinger <gunterze@gmail.com>
 *
 */
@Stateless
public class CodeServiceEJB implements CodeService {

    @PersistenceContext(name = "dcm4chee-arc", unitName="dcm4chee-arc")
    private EntityManager em;

    @Override
    public Code findOrCreate(org.dcm4che3.data.Code code) {
        if (code == null)
            return null;
        try {
            return find(code);
        } catch (NoResultException e) {
            if (!(code instanceof Code))
                code = new Code(code);
            em.persist(code);
            return (Code) code;
        }
    }

    private Code find(org.dcm4che3.data.Code code) {
        String codingSchemeVersion = code.getCodingSchemeVersion();
        TypedQuery<Code> query = em.createNamedQuery(
                codingSchemeVersion == null
                        ? Code.FIND_BY_CODE_VALUE_WITHOUT_SCHEME_VERSION
                        : Code.FIND_BY_CODE_VALUE_WITH_SCHEME_VERSION,
                    Code.class)
                .setParameter(1, code.getCodeValue())
                .setParameter(2, code.getCodingSchemeDesignator());
        if (codingSchemeVersion != null)
            query.setParameter(3, codingSchemeVersion);
        return query.getSingleResult();
    }

}