/**
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.reteoo;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import junit.framework.TestCase;
import org.drools.Otherwise;
import org.drools.RuleBase;
import org.drools.RuleBaseFactory;
import org.drools.base.ClassFieldAccessorCache;
import org.drools.base.ClassObjectType;
import org.drools.base.TestBean;
import org.drools.rule.Package;
import org.drools.rule.Pattern;
import org.drools.rule.Rule;
import org.drools.WorkingMemory;
import org.drools.spi.Consequence;
import org.drools.spi.KnowledgeHelper;
/**
* This tests the "otherwise" feature.
* @author Michael Neale
*/
public class OtherwiseTest extends TestCase {
public void testOneRuleFiringNoOtherwise() throws Exception {
final RuleBase ruleBase = RuleBaseFactory.newRuleBase( RuleBase.RETEOO );
final Package pkg = new Package( "Miss Manners" );
pkg.setClassFieldAccessorCache( new ClassFieldAccessorCache( Thread.currentThread().getContextClassLoader() ) );
final Rule rule1 = getRule( "rule1" );
pkg.addRule( rule1 );
final Rule ruleOtherwise = getOtherwise( "rule2" );
pkg.addRule( ruleOtherwise );
ruleBase.addPackage( pkg );
final WorkingMemory workingMemory = ruleBase.newStatefulSession();
workingMemory.insert( new TestBean() );
workingMemory.fireAllRules();
assertTrue( ((MockConsequence) rule1.getConsequence()).fired );
assertFalse( ((MockConsequence) ruleOtherwise.getConsequence()).fired );
}
public void testTwoRulesFiringNoOtherwise() throws Exception {
final RuleBase ruleBase = RuleBaseFactory.newRuleBase( RuleBase.RETEOO );
final Package pkg = new Package( "Miss Manners" );
pkg.setClassFieldAccessorCache( new ClassFieldAccessorCache( Thread.currentThread().getContextClassLoader() ) );
final Rule rule1 = getRule( "rule1" );
pkg.addRule( rule1 );
final Rule rule2 = getRule( "rule2" );
pkg.addRule( rule2 );
final Rule ruleOtherwise = getOtherwise( "ruleOtherwise" );
pkg.addRule( ruleOtherwise );
ruleBase.addPackage( pkg );
final WorkingMemory workingMemory = ruleBase.newStatefulSession();
workingMemory.insert( new TestBean() );
workingMemory.fireAllRules();
assertFalse( ((MockConsequence) ruleOtherwise.getConsequence()).fired );
assertTrue( ((MockConsequence) rule1.getConsequence()).fired );
assertTrue( ((MockConsequence) rule2.getConsequence()).fired );
}
/**
* @TODO: this is a future to be implemented in the future
* @throws Exception
*/
public void FIXME_testOtherwiseFiringWithOneRule() throws Exception {
final RuleBase ruleBase = RuleBaseFactory.newRuleBase( RuleBase.RETEOO );
final Package pkg = new Package( "Miss Manners" );
pkg.setClassFieldAccessorCache( new ClassFieldAccessorCache( Thread.currentThread().getContextClassLoader() ) );
final Rule rule1 = getRule( "rule1" );
pkg.addRule( rule1 );
final Rule ruleOtherwise = getOtherwise( "rule2" );
pkg.addRule( ruleOtherwise );
ruleBase.addPackage( pkg );
final WorkingMemory workingMemory = ruleBase.newStatefulSession();
workingMemory.fireAllRules();
assertFalse( ((MockConsequence) rule1.getConsequence()).fired );
assertTrue( ((MockConsequence) ruleOtherwise.getConsequence()).fired );
}
/**
* @TODO: this is a future to be implemented in the future
* @throws Exception
*/
public void FIXME_testOtherwiseFiringMultipleRules() throws Exception {
final RuleBase ruleBase = RuleBaseFactory.newRuleBase( RuleBase.RETEOO );
final Package pkg = new Package( "Miss Manners" );
pkg.setClassFieldAccessorCache( new ClassFieldAccessorCache( Thread.currentThread().getContextClassLoader() ) );
final Rule rule1 = getRule( "rule1" );
pkg.addRule( rule1 );
final Rule rule2 = getRule( "rule2" );
pkg.addRule( rule2 );
final Rule ruleOtherwise1 = getOtherwise( "other1" );
pkg.addRule( ruleOtherwise1 );
final Rule ruleOtherwise2 = getOtherwise( "other2" );
pkg.addRule( ruleOtherwise2 );
ruleBase.addPackage( pkg );
final WorkingMemory workingMemory = ruleBase.newStatefulSession();
workingMemory.fireAllRules();
assertFalse( ((MockConsequence) rule1.getConsequence()).fired );
assertFalse( ((MockConsequence) rule2.getConsequence()).fired );
assertTrue( ((MockConsequence) ruleOtherwise1.getConsequence()).fired );
assertTrue( ((MockConsequence) ruleOtherwise2.getConsequence()).fired );
}
private Rule getOtherwise(final String name) {
final Rule rule = new Rule( name );
final Pattern pat = new Pattern( 0,
new ClassObjectType( Otherwise.class) );
rule.addPattern( pat );
rule.setConsequence( new MockConsequence() );
return rule;
}
private Rule getRule(final String name) {
final Rule rule = new Rule( name );
final Pattern pat = new Pattern( 0,
new ClassObjectType( TestBean.class ) );
rule.addPattern( pat );
rule.setConsequence( new MockConsequence() );
return rule;
}
static class MockConsequence
implements
Consequence {
public boolean fired = false;
public void evaluate(final KnowledgeHelper knowledgeHelper,
final WorkingMemory workingMemory) throws Exception {
this.fired = true;
}
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
}
public void writeExternal(ObjectOutput out) throws IOException {
}
public String getName() {
return "default";
}
}
}