public PDDeviceNAttributes() 
{
        dictionary = new COSDictionary();
}

Constructor.

 public PDDeviceNAttributes(COSDictionary attributes) 
{
        dictionary = attributes;
}

Constructor.

Parameters:

attributes - A dictionary that has all of the attributes.

 public COSDictionary getCOSDictionary() 
{
        return dictionary;
}

This will get the underlying cos dictionary.

 public Map getColorants() throws IOException 
{
        Map actuals = new HashMap();
        COSDictionary colorants = (COSDictionary)dictionary.getDictionaryObject( COSName.getPDFName( "Colorants" ) );
        if( colorants == null )
        {
            colorants = new COSDictionary();
            dictionary.setItem( COSName.getPDFName( "Colorants" ), colorants );
        }
        for( COSName name : colorants.keySet() )
        {
            COSBase value = colorants.getDictionaryObject( name );
            actuals.put( name.getName(), PDColorSpaceFactory.createColorSpace( value ) );
        }
        return new COSDictionaryMap( actuals, colorants );
}

This will get a map of colorants. See the PDF Reference for more details about this attribute. The map will contain a java.lang.String as the key, a colorant name, and a PDColorSpace as the value.

 public  void setColorants(Map colorants) 
{
        COSDictionary colorantDict = null;
        if( colorants != null )
        {
            colorantDict = COSDictionaryMap.convert( colorants );
        }
        dictionary.setItem( COSName.getPDFName( "Colorants" ), colorantDict );
}

This will replace the existing colorant attribute. The key should be strings and the values should be PDColorSpaces.