package org.drools.template.parser;
import org.drools.rule.GroupElement;
import org.drools.rule.IndexableConstraint;
import org.drools.rule.Package;
import org.drools.rule.Rule;
import org.drools.spi.Constraint;
import org.junit.Test;
import java.util.HashMap;
import java.util.Map;
import static org.junit.Assert.assertEquals;
public class DefaultTemplateRuleBaseTest {
@SuppressWarnings("unchecked")
@Test
public void testSimpleTemplate() throws Exception
{
TemplateContainer tc = new TemplateContainer() {
private Column[] columns = new Column[] {
new LongColumn("column1"),
new LongColumn("column2"),
new StringColumn("column3")
};
public Column[] getColumns() {
return columns;
}
public String getHeader() {
return null;
}
public Map<String, RuleTemplate> getTemplates() {
Map<String, RuleTemplate> templates = new HashMap<String, RuleTemplate>();
RuleTemplate ruleTemplate = new RuleTemplate("template1", this);
ruleTemplate.addColumn("column1 == 10");
ruleTemplate.addColumn("column2 < 5 || > 20");
ruleTemplate.addColumn("column3 == \"xyz\"");
templates.put("template1", ruleTemplate);
return templates;
}
public Column getColumn(String name) {
return columns[Integer.parseInt(name.substring(6)) - 1];
}
};
DefaultTemplateRuleBase ruleBase = new DefaultTemplateRuleBase(tc);
Package[] packages = ruleBase.newStatefulSession().getRuleBase().getPackages();
assertEquals(1, packages.length);
Map<String, String> globals = packages[0].getGlobals();
assertEquals(DefaultGenerator.class.getName(), globals.get("generator"));
Rule[] rules = packages[0].getRules();
assertEquals(1, rules.length);
assertEquals("template1", rules[0].getName());
GroupElement lhs = rules[0].getLhs();
//when
// r : Row()
// column1 : Column(name == "column1")
// exists LongCell(row == r, column == column1, value == 10)
// column2 : Column(name == "column2")
// exists LongCell(row == r, column == column2, value < 5 | > 20)
// column3 : Column(name == "column3")
// exists StringCell(row == r, column == column3, value == "xyz")
assertEquals(7, lhs.getChildren().size());
org.drools.rule.Pattern pattern = (org.drools.rule.Pattern) lhs.getChildren().get(1);
assertEquals(1, pattern.getConstraints().size());
Constraint constraint = pattern.getConstraints().get(0);
GroupElement exists = (GroupElement) lhs.getChildren().get(2);
pattern = (org.drools.rule.Pattern) exists.getChildren().get(0);
assertEquals(3, pattern.getConstraints().size());
IndexableConstraint vconstraint = (IndexableConstraint)pattern.getConstraints().get(1);
assertEquals(Column.class, vconstraint.getFieldIndex().getExtractor().getExtractToClass());
assertEquals("column1", vconstraint.getRequiredDeclarations()[0].getIdentifier());
pattern = (org.drools.rule.Pattern) lhs.getChildren().get(3);
assertEquals(1, pattern.getConstraints().size());
constraint = pattern.getConstraints().get(0);
exists = (GroupElement) lhs.getChildren().get(4);
pattern = (org.drools.rule.Pattern) exists.getChildren().get(0);
assertEquals(3, pattern.getConstraints().size());
vconstraint = (IndexableConstraint)pattern.getConstraints().get(1);
assertEquals(Column.class, vconstraint.getFieldIndex().getExtractor().getExtractToClass());
assertEquals("column2", vconstraint.getRequiredDeclarations()[0].getIdentifier());
pattern = (org.drools.rule.Pattern) lhs.getChildren().get(5);
assertEquals(1, pattern.getConstraints().size());
constraint = pattern.getConstraints().get(0);
exists = (GroupElement) lhs.getChildren().get(6);
pattern = (org.drools.rule.Pattern) exists.getChildren().get(0);
assertEquals(3, pattern.getConstraints().size());
vconstraint = (IndexableConstraint)pattern.getConstraints().get(1);
assertEquals(Column.class, vconstraint.getFieldIndex().getExtractor().getExtractToClass());
assertEquals("column3", vconstraint.getRequiredDeclarations()[0].getIdentifier());
}
}