IBM BPM, V8.0.1, All platforms > Programming IBM BPM > Business rule management programming > Examples

Example 3: Retrieve business rule groups by multiple properties with AND

This example is also similar to example 1, but will only retrieve those business rule groups which have a property named Department and a value of “accounting” and a property named RuleType and a value of “regulatory”.

package com.ibm.websphere.sample.brules.mgmt;

import java.util.Iterator;
import java.util.List;

import com.ibm.wbiserver.brules.mgmt.BusinessRuleGroup;
import com.ibm.wbiserver.brules.mgmt.BusinessRuleManagementException;
import com.ibm.wbiserver.brules.mgmt.BusinessRuleManager;
import com.ibm.wbiserver.brules.mgmt.Property;
import com.ibm.wbiserver.brules.mgmt.PropertyList;
import com.ibm.wbiserver.brules.mgmt.query.AndNode;
import com.ibm.wbiserver.brules.mgmt.query.PropertyQueryNode;
import com.ibm.wbiserver.brules.mgmt.query.QueryNodeFactory;
import com.ibm.wbiserver.brules.mgmt.query.QueryOperator;

public class Example3
{
static Formatter out = new Formatter();
static public String executeExample3()
{
		try
		{
				out.clear();

Queries for business rule groups are composed of query nodes that follow a tree structure. Each query node has a left side term and a right side term and condition. Each term and right term can be another query node. For this example the business rule group is retrieved by the combination of two property values.

			// Retrieve business rule groups based on two conditions
			// Create PropertyQueryNodes for each one condition
			PropertyQueryNode propertyNode1 = QueryNodeFactory
					.createPropertyQueryNode("Department", 					QueryOperator.EQUAL,"Accounting");
			PropertyQueryNode propertyNode2 = QueryNodeFactory
					.createPropertyQueryNode("RuleType", QueryOperator.EQUAL, 					"regulatory");
			// Combine the two PropertyQueryNodes with an AND node 			AndNode andNode =
			QueryNodeFactory.createAndNode(propertyNode1, propertyNode2);

			// Use andNode in search for business rule groups 			List<BusinessRuleGroup> brgList = BusinessRuleManager
					.getBRGsByProperties(andNode, 0, 0);

			Iterator<BusinessRuleGroup> iterator = brgList.iterator();

			BusinessRuleGroup brg = null;
			// Iterate through the list of business rule groups 			while (iterator.hasNext())
			{
					brg = iterator.next();
					// Output attributes for each business rule group 					out.printlnBold("Business Rule Group");
					out.println("Name: " + brg.getName());
					out.println("Namespace: " +
					brg.getTargetNameSpace());
					out.println("Display Name: " + brg.getDisplayName());
					out.println("Description: " + brg.getDescription());
					out.println("Presentation Time zone: "
					+ brg.getPresentationTimezone());
					out.println("Save Date: " + brg.getSaveDate());

					PropertyList propList = brg.getProperties();

					Iterator<Property> propIterator =
					propList.iterator();
					Property prop = null;
					// Output property names and values 					while (propIterator.hasNext())
					{
							prop = propIterator.next();
							out.println("\t Property Name: " +
							prop.getName());
							out.println("\t Property Value: " +
							prop.getValue());
					} 			} 	} catch (BusinessRuleManagementException e)
	{
	e.printStackTrace();
	out.println(e.getMessage());
	} 	return out.toString();
	} }

Example

Web browser output for example 3.

Executing example3

Business Rule Group
Name: ApprovalValues
Namespace: http://BRSamples/com/ibm/websphere/sample/brules
Display Name: ApprovalValues
Description: null
Presentation Time zone: LOCAL
Save Date: Sun Jan 06 17:56:51 CST 2008
Property Name: IBMSystemVersion
Property Value: 6.2.0
Property Name: Department
Property Value: Accounting
Property Name: RuleType
Property Value: regulatory
Property Name: IBMSystemTargetNameSpace
Property Value: http://BRSamples/com/ibm/websphere/sample/brules
Property Name: IBMSystemName
Property Value: ApprovalValues
Property Name: IBMSystemDisplayName
Property Value: ApprovalValues

Examples