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package gr.uoa.di.driver.enabling.resultset;
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import java.util.ArrayList;
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import java.util.List;
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import javax.xml.bind.JAXBException;
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import org.apache.log4j.Logger;
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import eu.dnetlib.api.enabling.ResultSetService;
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import eu.dnetlib.api.enabling.ResultSetServiceException;
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import eu.dnetlib.domain.EPR;
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import eu.dnetlib.util.ObjectToXmlConverter;
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public class ResultSetImpl<D> implements ResultSet<D> {
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static Logger logger = Logger.getLogger(ResultSetImpl.class);
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private EPR epr = null;
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static ObjectToXmlConverter<String> dummyConverter = new ObjectToXmlConverter<String>() {
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public String XmlToObject(String xml) throws JAXBException {
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return xml;
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}
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public String ObjectToXml(String object) throws JAXBException {
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return object;
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}
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};
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private String identifier = null;
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private ObjectToXmlConverter<D> converter = null;
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private ResultSetService rsService = null;
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@SuppressWarnings("unchecked")
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public ResultSetImpl(ResultSetService rsService, String rsIdentifier) {
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this(rsService, rsIdentifier, (ObjectToXmlConverter<D>) dummyConverter);
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}
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public ResultSetImpl(ResultSetService rsService, String rsIdentifier,
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ObjectToXmlConverter<D> converter) {
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this.identifier = rsIdentifier;
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this.converter = converter;
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this.rsService = rsService;
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}
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public boolean isOpen() {
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boolean open = false;
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try {
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String status = rsService.getRSStatus(identifier);
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open = status.toLowerCase().equals("open");
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} catch (ResultSetServiceException e) {
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logger.warn("Result Set Error.", e);
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}
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return open;
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}
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public boolean isAlive() {
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try {
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rsService.getNumberOfElements(identifier);
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} catch (ResultSetServiceException rsse) {
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// TODO: something??? nothing
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return false;
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}
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return true;
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}
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public void close() {
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rsService.closeRS(identifier);
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}
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public int size() {
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int size = 0;
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try {
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size = rsService.getNumberOfElements(identifier);
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} catch (ResultSetServiceException e) {
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logger.warn("Result Set Error.", e);
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}
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return size;
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}
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public List<String> getElements(int from, int to) {
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List<String> elements = null;
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try {
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elements = rsService.getResult(identifier, from, to, "waiting");
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} catch (ResultSetServiceException e) {
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logger.warn("Result Set Error.", e);
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}
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return elements;
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}
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public List<D> get(int from, int to) {
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List<String> elements = getElements(from, to);
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List<D> list = null;
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if (elements != null) {
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list = new ArrayList<D>(elements.size());
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for (String element : elements) {
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try {
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D d = converter.XmlToObject(element);
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list.add(d);
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} catch (JAXBException e) {
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logger.warn("Error converting element: " + element);
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}
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}
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}
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return list;
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}
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public EPR getEpr() {
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return epr;
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}
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public void setEpr(EPR epr) {
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this.epr = epr;
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}
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}
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