Bug 178164 Use IEngineTask.status constants and remove unnecessary status variables in EngineTask.
1)Remove following redundant variables in EngineTask used for status info. protected final int RUNNING_STATUS_START = 0; protected final int RUNNING_STATUS_RUNNING = 1; protected final int RUNNING_STATUS_STOP = 2; EngineTask already has access to constants declared in IEngineTask. Use those instead. 2)Remove the unused errorHandlingOption in EngineTask.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/EngineTask.java
}
	protected IQueryResults executeDataSet( DataSetHandle hDataSet,
			HashMap parameters )
	{
		return null;
	}
	/**
	 * use the user setting parameters values to setup the execution context.
	 * the user setting values and default values are merged here.
	 */
	protected void usingParameterValues( )
	{
		if ( !parameterChanged )
		{
			return;
		}
		parameterChanged = false;
		
		executionContext.clearParameters( );
		runValues.clear( );
		
		Iterator iterator = inputValues.entrySet( ).iterator( );
		while ( iterator.hasNext( ) )
		{
			Map.Entry entry = (Map.Entry) iterator.next( );
			Object key = entry.getKey( );
			ParameterAttribute attribute = (ParameterAttribute) entry
					.getValue( );
			runValues.put( key, attribute.getValue( ) );
			executionContext.setParameter( (String) key, attribute.getValue( ),