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Revision 31217

Added by Michele Artini over 9 years ago

partial implementation

View differences:

ResultSetServiceImpl.java
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package eu.dnetlib.enabling.resultset;
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import javax.jws.WebService;


  		




  
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import java.util.List;


  		




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import org.apache.commons.logging.Log;


  		




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import org.apache.commons.logging.LogFactory;


  		




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import org.springframework.beans.factory.annotation.Required;


  		




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import com.google.common.collect.Lists;


  		




  
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import eu.dnetlib.enabling.resultset.listener.ResultSetListener;


  		




  
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import eu.dnetlib.enabling.resultset.registry.ResultSetRegistry;


  		




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import eu.dnetlib.enabling.resultset.rmi.ResultSetException;


  		




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import eu.dnetlib.enabling.resultset.rmi.ResultSetResponse;


  		




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import eu.dnetlib.enabling.resultset.rmi.ResultSetService;


  		




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import eu.dnetlib.enabling.tools.AbstractBaseService;


  		




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/**


  		




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 * This component dispatches the service method calls to stateful datastructure instances and to the singleton core.


  		




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 * 


  		




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 * @author michele


  		




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 * 


  		




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 */


  		




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@WebService(targetNamespace = "http://services.dnetlib.eu/")


  		




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public class ResultSetServiceImpl extends AbstractBaseService implements ResultSetService {


  		




  
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public class ResultSetServiceImpl implements ResultSetService {


  		




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	/**


  		




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	 * logger.


  		




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	 */


  		




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	private static final Log log = LogFactory.getLog(ResultSetServiceImpl.class); // NOPMD by marko on 11/24/08 5:02 PM


  		




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	/**


  		




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	 * Maps resultset identifiers to resultsets and manages expiration etc.


  		




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	 */


  		




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	private ResultSetRegistry resultsetRegistry;


  		




  
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	private ResultSetRegistry resultSetRegistry;


  		




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	/**


  		




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	 * Returns the next elements of a resultset


  		




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	 */


  		




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	@Override


  		




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	public ResultSetResponse getNextResults(final String rsId, int n) throws ResultSetException {


  		




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		log.debug("Returning next " + n +  " records of resultset " + rsId);


  		




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		final ResultSet resultSet = getResultSetById(rsId); // NOPMD


  		




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		return resultSet.getNextResults(n);


  		




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	}


  		




  
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	public <T> ResultSetResponse<T> getNextResults(final String rsId, final int n, final Class<T> clazz) throws ResultSetException {


  		




  
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		final ResultSetListener<T> rs = resultSetRegistry.getResultSetById(rsId, clazz);


  		




  
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		final int start = rs.getCount();


  		




  
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		final List<T> elements = Lists.newArrayList();


  		




  
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		while (rs.hasNext() && elements.size() < n) {


  		




  
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			elements.add(rs.next());


  		




  
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		}


  		




  
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		final int from = start;


  		




  
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		final int to = rs.getCount();


  		




  
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		final boolean end = !rs.hasNext();


  		




  
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		final int total = rs.getTotal();


  		




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	/**


  		




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	 * obtain the resultset object for a given id.


  		




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	 * 


  		




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	 * @param rsId


  		




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	 *            resultset id


  		




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	 * @return resultset object, never null


  		




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	 * @throws ResultSetException


  		




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	 *             thrown when the id doesn't exist;


  		




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	 */


  		




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	private ResultSet getResultSetById(final String rsId) throws ResultSetException {


  		




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		final ResultSet resultSet = resultsetRegistry.getResultSetById(rsId); // NOPMD


  		




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		if (resultSet == null) throw new ResultSetException("resultset with id '" + rsId + "' doesn't exist");


  		




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		return resultSet;


  		




  
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		return new ResultSetResponse<T>(from, to, end, total, elements);


  		




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	}


  		




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	public ResultSetRegistry getResultsetRegistry() {


  		




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		return resultsetRegistry;


  		




  
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	public ResultSetRegistry getResultSetRegistry() {


  		




  
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		return resultSetRegistry;


  		




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	}


  		




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	@Required


  		




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	public void setResultsetRegistry(final ResultSetRegistry resultsetRegistry) {


  		




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		this.resultsetRegistry = resultsetRegistry;


  		




  
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	public void setResultSetRegistry(ResultSetRegistry resultSetRegistry) {


  		




  
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		this.resultSetRegistry = resultSetRegistry;


  		




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	}


  		




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}


  		












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