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/* This is a sample custom publisher Java class that inserts a value for Currency column, 
which is not entered on the form by the customer. */ 
import java.util.ArrayList;
import java.util.HashMap;
import com.intellectdesign.canvas.model.StateModelException;
import com.intellectdesign.canvas.reqmodel.external.CanvasPublishContext;
import com.intellectdesign.canvas.reqmodel.external.CanvasReqModelDBPublisher; 


/* In this example, the form data is to be sent to database, hence the 
custom publisher class must be extended from CanvasReqModelDBPublisher class. */ 
public class CustomPublisher extends CanvasReqModelDBPublisher 
{ 
	/* The prepareDataToBePublished method prepares the data to be sent 
	to the database and can be used for any data manipulation or 
	formatting needs. */

	@Override
	public void prepareDataToBePublished(CanvasPublishContext publishContext) throws StateModelException
	{
		super.prepareDataToBePublished(publishContext); 

		// Form data is stored in an array list.
		ArrayList data = (ArrayList) publishContext.getFormattedData(); 

		/* Two array list variables are used to store field IDs 
		and field values separately. */
		ArrayList columnList, valueList;
		columnList =(ArrayList) ((HashMap)data.get(0)).get("COLUMN_IDS");
		valueList =(ArrayList) ((HashMap)data.get(0)).get("VALUES"); 

		/* The getUserData method fetches the user details such as 
		GCIF, user ID, first/last name etc. */
		publishContext.getUserData(); 

		/* The index number of the Currency field in the 
		array list is stored in a variable. */
		int ind = columnList.indexOf("CURRENCY"); 

		/* The current value of the field is removed and 
		new value is assigned to it. */
		valueList.remove(ind);
		valueList.add(ind,"USD"); 

		/* The setFormattedData method sets the data 
		in the CanvasPublishContext object. */
		publishContext.setFormattedData(data);
	} 

	/* The publish method publishes the formatted data 
	in the CanvasPublishContext object to the database. */
	@Override
	public boolean publish(CanvasPublishContext publishContext) throws StateModelException 
	{
		return super.publish(publishContext);
	}
}