Creating a task command for the customer segment attribute

The following example is a task command implementation for a new customer segment attribute. This attribute allows business users to specify that customers must have a certain number of loyalty points to be in the customer segment.

/**
 * This class extends the CheckUserInMemberGroupCmdImpl class to implement
 * the evaluation programming logic that handles the loyalty points
 * simple condition.
 */

package com.mycompany.membergroup.commands;

import com.ibm.commerce.condition.ConditionUtil;
import com.ibm.commerce.condition.SimpleCondition;
import com.ibm.commerce.membergroup.commands.CheckUserInMemberGroupCmdImpl;
import com.ibm.commerce.tools.segmentation.SegmentUtil; 


public class ExtCheckUserInMemberGroupCmdImpl
	extends CheckUserInMemberGroupCmdImpl {

	/**
	 * For this example, the simple condition variable name is defined as
	 * a string of "loyalty". In practice, this constant should be defined in
	 *  a separate constant class.
	 */
	public static final String VARIABLE_LOYALTY_POINTS = "loyalty";


	/**
	 * Override the parent's method to evaluate the loyalty points
	 * simple condition.
	 * @return  <code>true</code> if the condition evaluates to true.
	 */
	public boolean evaluate(
		String variable,
		String operator,
		String value,
		SimpleCondition.Qualifier[] qualifiers) {

		boolean result = false;

		if (VARIABLE_LOYALTY_POINTS.equals(variable)) {
			// If the simple condition is for loyalty points,
			// invoke the specific loyalty points evaluation
			// method to handle the case.
			result = evaluateLoyaltyPointsCondition(operator, value, qualifiers);
		} else {
			// Since we override this evaluate() method from
			// the parent class to take care of the new loyalty
			// points condition, call the parent's
			// evaluate() method to handle all the other simple
			// conditions.
			result = super.evaluate(variable, operator, value, qualifiers);
		}
		return result;
	}


	/**
	 * Evaluate the loyalty points condition.
	 */
	protected boolean evaluateLoyaltyPointsCondition(
		String operator,
		String value,
		SimpleCondition.Qualifier[] qualifiers) {

		Integer numOfPoints = null;
		try {
			// To simplify this example, assume the loyalty points
			// value is stored in the table USERDEMO in the
			// customizable column FIELD6. We can use the parent's
			// class method getDemographics() to retrieve the access
			// bean that contains the USERDEMO information.
			if (getDemographics() != null) {
				// uncomment one of the lines below depending on whether the environment is v7, v8, or v91+
				// numOfPoints = getDemographics().getField6InEJBType();    // v7 and v8 code
				// numOfPoints = getDemographics().getField6InEntityType(); // v91+ code code
				   numOfPoints = getDemographics().getField6InEntityType(); // v91+ code code
			}
		}
		catch (Exception e) {
			// Handle the exception here.
		}

		// Call the ConditionUtil helper class's evaluateInteger()
		// method to evaluate the loyalty points integer value
		// with the given operator.
		return ConditionUtil.evaluateInteger
				(numOfPoints, operator, SegmentUtil.toInteger(value));
	}

}//end-ExtCheckUserInMemberGroupCmdImpl