ObjectTypeNodes are responsible for filtering and propagating the matching fact assertions propagated from the Rete node using ObjectType interface. The assert and retract methods do not attempt to filter as this is the role of the Rete node which builds up a cache of matching ObjectTypdeNodess for each asserted object, using the matches(Object object) method. Incorrect propagation in these methods is not checked and will result in ClassCastExpcections later on in the network.
Filters Objects coming from the Rete using a ObjectType semantic module.
@see ObjectType
@see Rete
str += "ObjectTypeNode :\n";
str += "otn1, java.lang.Integer;\n";
NodeTestResult result = executeTest( str );
ObjectTypeNode otn1 = (ObjectTypeNode) result.context.get( "otn1" );
assertNotNull( otn1 );
assertEquals( new ClassObjectType( Integer.class ),
otn1.getObjectType() );
}
str += "LeftInputAdapterNode:\n";
str += " lian0, otn1;";
NodeTestResult result = executeTest( str );
ObjectTypeNode otn1 = (ObjectTypeNode) result.context.get( "otn1" );
LeftInputAdapterNode lian0 = (LeftInputAdapterNode) result.context.get( "lian0" );
assertNotNull( lian0 );
assertSame( lian0,
otn1.getSinkPropagator().getSinks()[0] );
}
} else {
epn.attach();
}
}
ObjectTypeNode otn = new ObjectTypeNode( context.getNextId(),
epn,
objectType,
context );
long expirationOffset = getExpiratioOffsetForType( context,
objectType );
otn.setExpirationOffset( expirationOffset );
if ( wms.length > 0 ) {
otn.attach( wms );
} else {
otn.attach();
}
return otn;
} finally {
ruleBase.readUnlock();
context.setObjectTypeNodeMemoryEnabled( false );
context.setAlphaNodeMemoryAllowed( false );
}
}
ObjectTypeNode otn = new ObjectTypeNode( context.getNextId(),
(EntryPointNode) context.getObjectSource(),
objectType,
context );
if ( objectType.isEvent() && EventProcessingOption.STREAM.equals( context.getRuleBase().getConfiguration().getEventProcessingMode() ) ) {
long expirationOffset = getExpiratioOffsetForType( context,
objectType );
if( expirationOffset != -1 ) {
// expiration policy is set, so use it
otn.setExpirationOffset( expirationOffset );
} else {
// otherwise calculate it based on behaviours and temporal constraints
for ( Behavior behavior : pattern.getBehaviors() ) {
if ( behavior.getExpirationOffset() != -1 ) {
expirationOffset = Math.max( behavior.getExpirationOffset(),
expirationOffset );
}
}
long distance = context.getTemporalDistance().getExpirationOffset( pattern );
if( distance == -1 ) {
// it means the rules have no temporal constraints, or
// the constraints require events to be hold forever. In this
// case, we allow type declarations to override the implicit
// expiration offset by defining an expiration policy with the
// @expires tag
otn.setExpirationOffset( expirationOffset );
} else {
otn.setExpirationOffset( Math.max( distance, expirationOffset ) );
}
}
}
context.setObjectSource( (ObjectSource) utils.attachNode( context,
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
List<ObjectTypeNode> nodes = ((InternalRuleBase)((KnowledgeBaseImpl)kbase).ruleBase).getRete().getObjectTypeNodes();
ObjectTypeNode node = null;
for ( ObjectTypeNode n : nodes ) {
if ( ((ClassObjectType)n.getObjectType()).getClassType() == Person.class ) {
node = n;
break;
}
}
ReteooWorkingMemory wm = ((StatefulKnowledgeSessionImpl)kbase.newStatefulKnowledgeSession()).session;
LeftInputAdapterNode liaNode = (LeftInputAdapterNode) node.getSinkPropagator().getSinks()[0];
JoinNode j2 = ( JoinNode ) liaNode.getSinkPropagator().getSinks()[0]; // $p2
JoinNode j3 = ( JoinNode ) j2.getSinkPropagator().getSinks()[0]; // $p3
SingleBetaConstraints c = ( SingleBetaConstraints ) j2.getRawConstraints();
assertEquals( "$name", ((VariableConstraint)c.getConstraint()).getRequiredDeclarations()[0].getIdentifier() );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
List<ObjectTypeNode> nodes = ((InternalRuleBase)((KnowledgeBaseImpl)kbase).ruleBase).getRete().getObjectTypeNodes();
ObjectTypeNode node = null;
for ( ObjectTypeNode n : nodes ) {
if ( ((ClassObjectType)n.getObjectType()).getClassType() == DroolsQuery.class ) {
node = n;
break;
}
}
ReteooWorkingMemory wm = ((StatefulKnowledgeSessionImpl)kbase.newStatefulKnowledgeSession()).session;
AlphaNode alphanode = ( AlphaNode ) node.getSinkPropagator().getSinks()[0];
LeftInputAdapterNode liaNode = (LeftInputAdapterNode) alphanode.getSinkPropagator().getSinks()[0];
JoinNode j = ( JoinNode ) liaNode.getSinkPropagator().getSinks()[0]; // $p2
TripleNonIndexSkipBetaConstraints c = ( TripleNonIndexSkipBetaConstraints ) j.getRawConstraints();
//assertEquals( "$name", ((VariableConstraint)c.getConstraint()).getRequiredDeclarations()[0].getIdentifier() );
str += "ObjectTypeNode :\n";
str += "otn1, java.lang.Integer;\n";
NodeTestResult result = executeTest( str );
ObjectTypeNode otn1 = (ObjectTypeNode) result.context.get( "otn1" );
assertNotNull( otn1 );
assertEquals( new ClassObjectType( Integer.class ),
otn1.getObjectType() );
}
str += "LeftInputAdapterNode:\n";
str += " lian0, otn1;";
NodeTestResult result = executeTest( str );
ObjectTypeNode otn1 = (ObjectTypeNode) result.context.get( "otn1" );
LeftInputAdapterNode lian0 = (LeftInputAdapterNode) result.context.get( "lian0" );
assertNotNull( lian0 );
assertSame( lian0,
otn1.getSinkPropagator().getSinks()[0] );
}
assertEquals( "r1", list.get(0) );
// Check it was built with MVELReturnValueExpression constraint
List<ObjectTypeNode> nodes = ((InternalRuleBase)((KnowledgeBaseImpl)kbase).ruleBase).getRete().getObjectTypeNodes();
ObjectTypeNode node = null;
for ( ObjectTypeNode n : nodes ) {
if ( ((ClassObjectType)n.getObjectType()).getClassType() == Person.class ) {
node = n;
break;
}
}
AlphaNode alphanode = (AlphaNode) node.getSinkPropagator().getSinks()[0];
assertTrue( (( VariableConstraint ) alphanode.getConstraint()).getFieldExtractor() instanceof ClassFieldReader );
ReturnValueRestriction r = (ReturnValueRestriction) (( VariableConstraint ) alphanode.getConstraint()).getRestriction();
assertTrue( r.getExpression() instanceof ReturnValueExpression );
assertTrue( r.getExpression() instanceof MVELReturnValueExpression );
assertEquals( "r1", list.get(0) );
// Check it was built with MVELReturnValueExpression constraint
List<ObjectTypeNode> nodes = ((InternalRuleBase)((KnowledgeBaseImpl)kbase).ruleBase).getRete().getObjectTypeNodes();
ObjectTypeNode node = null;
for ( ObjectTypeNode n : nodes ) {
if ( ((ClassObjectType)n.getObjectType()).getClassType() == Person.class ) {
node = n;
break;
}
}
AlphaNode alphanode = (AlphaNode) node.getSinkPropagator().getSinks()[0];
assertTrue( (( VariableConstraint ) alphanode.getConstraint()).getFieldExtractor() instanceof MVELClassFieldReader );
ReturnValueRestriction r = (ReturnValueRestriction) (( VariableConstraint ) alphanode.getConstraint()).getRestriction();
assertTrue( r.getExpression() instanceof ReturnValueExpression );
assertTrue( r.getExpression() instanceof MVELReturnValueExpression );
Related Classes of org.drools.reteoo.ObjectTypeNode$ExpireJobContextTimerOutputMarshaller
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