@dtf:xquery-function Annotation

Specifies that a user-defined Java method (non-abstract) method in a DTF file can be invoked from queries (written in the XQuery language).

Syntax

@dtf:xquery-function

Remarks

In the following example, the @dtf:xquery-function annotation defines that the Java method calculateTotalPrice that can be invoked from a query during run time:

/**
 * @dtf:xquery-function
 */
public float calculateTotalPrice(float taxRate, int quantity, float price, boolean fillOrder)
{
	float totalTax, costNoTax, totalCost;
	if (fillOrder)
	{
		// Calculate the total tax
		totalTax = taxRate * quantity * price;
		// Calculate the total cost without tax
		costNoTax = quantity * price;
		// Add the tax and the cost to get the total cost
		totalCost = totalTax + costNoTax;
	}
	else
	{
		totalCost = 0;
	}
	return totalCost;
}