Drools Example

validation-rules.drl

package com.leaseplanis.iq.model.bo.options.validation

import com.leaseplanis.iq.model.bo.options.OptionDetail;
import com.leaseplanis.iq.model.bo.options.validation.translatableProviders.DuplicateOptionGroups;
import com.leaseplanis.iq.model.bo.options.validation.translatableProviders.DuplicateOptions;
import com.leaseplanis.iq.model.bo.options.validation.translatableProviders.Exclusion;
import com.leaseplanis.iq.model.bo.options.validation.translatableProviders.Inclusion;
import com.leaseplanis.iq.model.bo.options.validation.translatableProviders.InvalidSupplement;

# Find supplements whose corresponding pack has not been selected
rule "Supplement has parent"
when
	$option: OptionDetail(optionType == "S")
	not OptionDetail(optionId == $option.parentId)
then
	error = new InvalidSupplement($option, null);
	insert(error);
end

# Find options that have the same option identifier
rule "Duplicate options"
when
	$option: OptionDetail()
	OptionDetail(optionId == $option.optionId)
then
	error = new DuplicateOptions($option);
	insert(error);
end	

# Find options that have the same group id
rule "Duplicate option groups"
when
	$child: OptionDetail(groupId != null)
	$parent: OptionDetail(groupId == $child.groupId)
then
	error = new DuplicateOptionGroups(parent, child);
	insert(error);
end

rule "Find missing dependencies"
when
	$parent: OptionDetail()
	$child: OptionDetail()
	not OptionInclusion(parentId == $parent.optionId, childId == $child.optionId)
then
	error = new Exclusion(parent, child);
	insert(error);
end

rule "Find conflicting options"
when
	$parent: OptionDetail()
	$child: OptionDetail()
	not OptionExclusion(parentId == $parent.optionId, childId == $child.optionId)
then
	error = new Exclusion(parent, child);
	insert(error);
end