/**
* Constructus a LeftInputAdapterNode with a unique id that receives <code>FactHandle</code> from
* a parent <code>ObjectSource</code> and adds it to a given pattern in the resulting Tuples.
*
* @param id The unique id of this node in the current Rete network
* @param source The parent node, where Facts are propagated from
*/
public LeftInputAdapterNode(final int id, final ObjectSource source, final BuildContext context) {
super(
id,
context.getPartitionId(),
context.getRuleBase().getConfiguration().isMultithreadEvaluation());
this.objectSource = source;
this.leftTupleMemoryEnabled = context.isTupleMemoryEnabled();
ObjectSource current = source;
while (!(current instanceof ObjectTypeNode)) {
current = current.getParentObjectSource();
}
ObjectTypeNode otn = (ObjectTypeNode) current;
rootQueryNode = ClassObjectType.DroolsQuery_ObjectType.isAssignableFrom(otn.getObjectType());
}
/**
* Construct given a semantic <code>ObjectType</code> and the provided unique id. All <code>
* ObjectTypdeNode</code> have node memory.
*
* @param id The unique id for the node.
* @param objectType The semantic object-type differentiator.
*/
public ObjectTypeNode(
final int id,
final EntryPointNode source,
final ObjectType objectType,
final BuildContext context) {
super(
id,
context.getPartitionId(),
context.getRuleBase().getConfiguration().isMultithreadEvaluation(),
source,
context.getRuleBase().getConfiguration().getAlphaNodeHashingThreshold());
this.objectType = objectType;
this.lrUnlinkingEnabled = context.getRuleBase().getConfiguration().isLRUnlinkingEnabled();
setObjectMemoryEnabled(context.isObjectTypeNodeMemoryEnabled());
if (ClassObjectType.DroolsQuery_ObjectType.isAssignableFrom(objectType)) {
queryNode = true;
}
}
/**
* recurse through the rule condition elements updating the declaration objecs
*
* @param resolver
* @param contextStack
* @param element
*/
private void processElement(
final DeclarationScopeResolver resolver,
final Stack contextStack,
final RuleConditionElement element) {
if (element instanceof Pattern) {
Pattern pattern = (Pattern) element;
for (Iterator it = pattern.getNestedElements().iterator(); it.hasNext(); ) {
processElement(resolver, contextStack, (RuleConditionElement) it.next());
}
for (Constraint next : pattern.getConstraints()) {
if (next instanceof Declaration) {
continue;
}
Constraint constraint = (Constraint) next;
Declaration[] decl = constraint.getRequiredDeclarations();
for (int i = 0; i < decl.length; i++) {
Declaration resolved = resolver.getDeclaration(null, decl[i].getIdentifier());
if (constraint instanceof MvelConstraint
&& ((MvelConstraint) constraint).isUnification()) {
if (ClassObjectType.DroolsQuery_ObjectType.isAssignableFrom(
resolved.getPattern().getObjectType())) {
Declaration redeclaredDeclr =
new Declaration(
resolved.getIdentifier(),
((MvelConstraint) constraint).getFieldExtractor(),
pattern,
false);
pattern.addDeclaration(redeclaredDeclr);
} else {
((MvelConstraint) constraint).unsetUnification();
}
}
if (resolved != null && resolved != decl[i] && resolved.getPattern() != pattern) {
constraint.replaceDeclaration(decl[i], resolved);
} else if (resolved == null) {
// it is probably an implicit declaration, so find the corresponding pattern
Pattern old = decl[i].getPattern();
Pattern current = resolver.findPatternByIndex(old.getIndex());
if (current != null && old != current) {
resolved = new Declaration(decl[i].getIdentifier(), decl[i].getExtractor(), current);
constraint.replaceDeclaration(decl[i], resolved);
}
}
}
}
} else if (element instanceof EvalCondition) {
Declaration[] decl = ((EvalCondition) element).getRequiredDeclarations();
for (Declaration aDecl : decl) {
Declaration resolved = resolver.getDeclaration(null, aDecl.getIdentifier());
if (resolved != null && resolved != aDecl) {
((EvalCondition) element).replaceDeclaration(aDecl, resolved);
}
}
} else if (element instanceof Accumulate) {
for (RuleConditionElement rce : element.getNestedElements()) {
processElement(resolver, contextStack, rce);
}
((Accumulate) element).resetInnerDeclarationCache();
} else if (element instanceof From) {
DataProvider provider = ((From) element).getDataProvider();
Declaration[] decl = provider.getRequiredDeclarations();
for (Declaration aDecl : decl) {
Declaration resolved = resolver.getDeclaration(null, aDecl.getIdentifier());
if (resolved != null && resolved != aDecl) {
provider.replaceDeclaration(aDecl, resolved);
} else if (resolved == null) {
// it is probably an implicit declaration, so find the corresponding pattern
Pattern old = aDecl.getPattern();
Pattern current = resolver.findPatternByIndex(old.getIndex());
if (current != null && old != current) {
resolved = new Declaration(aDecl.getIdentifier(), aDecl.getExtractor(), current);
provider.replaceDeclaration(aDecl, resolved);
}
}
}
} else if (element instanceof QueryElement) {
QueryElement qe = (QueryElement) element;
Pattern pattern = qe.getResultPattern();
for (Entry<String, Declaration> entry : pattern.getInnerDeclarations().entrySet()) {
Declaration resolved = resolver.getDeclaration(null, entry.getValue().getIdentifier());
if (resolved != null && resolved != entry.getValue() && resolved.getPattern() != pattern) {
entry.setValue(resolved);
}
}
List<Integer> varIndexes = ArrayUtils.asList(qe.getVariableIndexes());
for (int i = 0; i < qe.getDeclIndexes().length; i++) {
Declaration declr = (Declaration) qe.getArgTemplate()[qe.getDeclIndexes()[i]];
Declaration resolved = resolver.getDeclaration(null, declr.getIdentifier());
if (resolved != null && resolved != declr && resolved.getPattern() != pattern) {
qe.getArgTemplate()[qe.getDeclIndexes()[i]] = resolved;
}
if (ClassObjectType.DroolsQuery_ObjectType.isAssignableFrom(
resolved.getPattern().getObjectType())) {
// if the resolved still points to DroolsQuery, we know this is the first unification
// pattern, so redeclare it as the visible Declaration
declr = pattern.addDeclaration(declr.getIdentifier());
// this bit is different, notice its the ArrayElementReader that we wire up to, not the
// declaration.
ArrayElementReader reader =
new ArrayElementReader(
new SelfReferenceClassFieldReader(Object[].class, "this"),
qe.getDeclIndexes()[i],
resolved.getExtractor().getExtractToClass());
declr.setReadAccessor(reader);
varIndexes.add(qe.getDeclIndexes()[i]);
}
}
qe.setVariableIndexes(ArrayUtils.toIntArray(varIndexes));
} else {
contextStack.push(element);
for (RuleConditionElement ruleConditionElement : element.getNestedElements()) {
processElement(resolver, contextStack, ruleConditionElement);
}
contextStack.pop();
}
}