// CreateBitSetNodeDialog

public class CreateBitSetNodeDialog extends DefaultNodeSettingsPane 
{
	
	/* bits selector */
	private final SettingsModelFilterString bits_selector_in_col;
	private final DialogComponentColumnFilter bits_selector_in_col_sel;

    /**
     * New pane for configuring the CreateBitSet node.
     */
    protected CreateBitSetNodeDialog() 
    {
    	
    	DataValueColumnFilter integerFilter = new DataValueColumnFilter(IntValue.class);
    	
    	bits_selector_in_col = new SettingsModelFilterString(CreateBitSetNodeModel.selectedProperties, CreateBitSetNodeModel.included_cols, CreateBitSetNodeModel.excluded_cols);
    	bits_selector_in_col_sel = new DialogComponentColumnFilter(bits_selector_in_col, 0, true, integerFilter);
		super.addDialogComponent(bits_selector_in_col_sel);
    }
}


// CreateBitSetNodeModel
@Override
protected DataTableSpec[] configure(final DataTableSpec[] inSpecs) throws InvalidSettingsException 
{

	/*
	 * Check for compatability 
	 */
	
	boolean hasIntColumn = false;
	
	for(int i = 0; i < inSpecs[0].getNumColumns(); i++)
	{
		DataColumnSpec columnSpec = inSpecs[0].getColumnSpec(i);
		
		if(columnSpec.getType().isCompatible(IntValue.class)) //TODO: ensure that this works
		{
			// found one numeric column
			hasIntColumn = true;
			break;
		}
	}
	
	if(!hasIntColumn)
	{
		throw new InvalidSettingsException("Input table does not contain a at least one int column, please (re-)configure the node.");
	}
	
	
	/*
	 * Create output spec
	 */
	
	List<String> includedColumns = fingerprint_selected_in_col.getIncludeList();
	
	DataTableSpec bitSetTableSpec = createBitSetTableSpec(inSpecs[0], includedColumns);
	
	
	// TODO: generated method stub
	return new DataTableSpec[]{bitSetTableSpec, null};
}


/**
 * 
 * @param inSpec
 * @param excludedColumns
 * @return
 */
private DataTableSpec createBitSetTableSpec(DataTableSpec inSpec, List<String> includedColumns)
{
	
	// Create the new column specs
	DataColumnSpec newColumnSpec = createOutputColumnSpec();
	
	// Create a new table spec based on the new column spec
	DataTableSpec appendedSpec = new DataTableSpec(newColumnSpec);
	
	// Adjust input spec
	
	ColumnRearranger columns = createColumnRearranger(inSpec, includedColumns);
	
	DataTableSpec ammendedInputSpec = columns.createSpec();
	
	// Join the original table spec and the new table spec
	DataTableSpec outputSpec = new DataTableSpec(ammendedInputSpec, appendedSpec);
	
	return outputSpec;
	
}


/**
 * Create the table spec for the new column
 * @return
 */
private DataColumnSpec createOutputColumnSpec() 
{
	// we want to add a column with the number of the bin 
	DataColumnSpecCreator colSpecCreator = new DataColumnSpecCreator("BitSet", BitSetCell.TYPE);
	// now the column spec can be created
	DataColumnSpec newColumnSpec = colSpecCreator.createSpec();
	return newColumnSpec;
}


/**
 * Column rearranger removing the included columns
 * @param in
 * @param excludedColumns
 * @return
 */
private ColumnRearranger createColumnRearranger(DataTableSpec in, List<String> includedColumns) 
{
	ColumnRearranger columns = new ColumnRearranger(in);
	
	String[] colsToRemove = new String[includedColumns.size()];
	//TODO: remove the unwanted columns
	for(int i = 0; i < includedColumns.size(); i++)
	{
		colsToRemove[i] = includedColumns.get(i);
	}
	
	columns.remove(colsToRemove);
	
	return columns;
}