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  package org.apache.cayenne.dba.sqlserver;
  
  import org.apache.cayenne.access.DataNode;
  import org.apache.cayenne.dba.JdbcActionBuilder;
  import org.apache.cayenne.query.BatchQuery;
  import org.apache.cayenne.query.FluentSelect;
  import org.apache.cayenne.query.ProcedureQuery;
  import org.apache.cayenne.query.SQLAction;
  
  /**
   * @since 1.2
   */
  public class SQLServerActionBuilder extends JdbcActionBuilder {
  
  	/**
  	 * Stores the major version of the database.
  	 *
  	 * @since 4.2
  	 */
  	private final Integer version;
  
  	/**
  	 * @param dataNode current data node
  	 * @since 4.0
  	 */
  	public SQLServerActionBuilder(DataNode dataNode) {
  		this(dataNode, null);
  	}
  
  	/**
  	 * @param dataNode current data node
  	 * @param version database server version
  	 * @since 4.2
  	 */
  	public SQLServerActionBuilder(DataNode dataNode, Integer version) {
  		super(dataNode);
  		this.version = version;
  	}
  
  	@Override
  	public SQLAction batchAction(BatchQuery query) {
  		// check run strategy...
  
  		// optimistic locking is not supported in batches due to JDBC driver limitations
  		boolean useOptimisticLock = query.isUsingOptimisticLocking();
  		boolean runningAsBatch = !useOptimisticLock && dataNode.getAdapter().supportsBatchUpdates();
  		return new SQLServerBatchAction(query, dataNode, runningAsBatch);
  	}
  
  	@Override
  	public SQLAction procedureAction(ProcedureQuery query) {
  		return new SQLServerProcedureAction(query, dataNode);
  	}
  
  	/**
  	 * @since 4.2
  	 */
  	@Override
  	public <T> SQLAction objectSelectAction(FluentSelect<T, ?> query) {
  		return new SQLServerSelectAction(query, dataNode, needInMemoryOffset(query));
  	}
  
  	private boolean needInMemoryOffset(FluentSelect<?, ?> query) {
  		return query.getOrderings() == null || query.getOrderings().size() == 0
  				|| version == null || version < 12;
  	}
  }
  