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package javax.resource.spi;

import java.util.Set;
import javax.resource.ResourceException;

/** 
 * This interface is implemented by a ManagedConnectionFactory
 * instance that supports the ability to validate 
 * ManagedConnection objects.
 *
 * This may be used by the application server to prune invalid 
 * ManagedConnection objects from its connection pool.
 *
 *  @author  Ram Jeyaraman
 *  @version 1.0
 */    
public interface ValidatingManagedConnectionFactory {

    /**
     * This method returns a set of invalid ManagedConnection 
     * objects chosen from a specified set of ManagedConnection
     * objects.
     *
     * @param connectionSet a set of ManagedConnection objects
     * that need to be validated.
     *
     * @return a set of invalid ManagedConnection objects.
     *
     * @throws ResourceException generic exception.
     */
    Set getInvalidConnections(Set connectionSet) throws ResourceException;
}