/**
* Some extra information is needed per variable inside the snippet to generate the parts. This
* information is wrapped in an extra
*
* <p>Build the set of template wrappers for the input variables of the loop
*
* @return
*/
public List<TemplateInputVariable> getTemplateAccessesWrappers() {
// TODO: Unit test for this
if (templateAccessesWrappers != null) return templateAccessesWrappers;
ArrayList<TemplateInputVariable> result = new ArrayList<>();
for (CtVariableAccess access : getAccesses()) {
TemplateInputVariable var = new TemplateInputVariable();
var.initialize(this, access);
if (printer instanceof DefaultJavaPrettyPrinter) {
var.setPrinter(new DefaultJavaPrettyPrinter(astElement.getFactory().getEnvironment()));
} else var.setPrinter(new AJMHPrettyPrinter(this));
result.add(var);
}
boolean canSerializeThiz =
getPreconditions().checkTypeRef(getASTElement().getParent(CtClass.class).getReference());
if (canSerializeThiz && getMustSerializeThiz()) {
// astElement.getFactory().Code().createVariableAccess()
TemplateInputVariable thiz = new TemplateInputVariable();
thiz.initializeAsThiz(this);
if (printer instanceof DefaultJavaPrettyPrinter) {
thiz.setPrinter(new DefaultJavaPrettyPrinter(astElement.getFactory().getEnvironment()));
} else thiz.setPrinter(new AJMHPrettyPrinter(this));
result.add(thiz);
}
templateAccessesWrappers = result;
return result;
}
public Boolean getMustSerializeThiz() {
if (mustSerializeThiz == null) {
List<CtInvocation> invocations =
astElement.getElements(new TypeFilter<CtInvocation>(CtInvocation.class));
for (CtInvocation inv : invocations) {
if (isImplicitThiz(inv)) {
mustSerializeThiz = true;
return true;
}
}
mustSerializeThiz = false;
}
return mustSerializeThiz;
}
public String getCode() {
if (astElement != null) {
try {
if (printer == null) return astElement.toString();
printer.reset();
printer.scan(astElement);
return printer.toString();
} catch (NullPointerException ex) {
throw new NullPointerException(
"Unable to get the code. Code field was empty and astElement.toString() throw null");
}
}
return code;
}
/**
* Type of the benchmarks method for this snippet. This is 'void' by default.
*
* <p>The benchmark method type must be the same that the one
*/
public String getBenchMethodReturnType() {
if (benchMethodReturnType == null) {
if (astElement != null) {
List<CtReturn> rets = astElement.getElements(new TypeFilter<CtReturn>(CtReturn.class));
if (rets != null && rets.size() > 0 && rets.get(0).getReturnedExpression() != null) {
CtTypeReference t = rets.get(0).getReturnedExpression().getType();
if (t.isAnonymous() || t.getQualifiedName().equals("<nulltype>"))
benchMethodReturnType = "Object";
else benchMethodReturnType = t.getQualifiedName();
}
}
}
return benchMethodReturnType == null ? "void" : benchMethodReturnType;
}
/** Sets the printer to be de default printer */
public void setPrinterToDefault() {
this.printer = new DefaultJavaPrettyPrinter(astElement.getFactory().getEnvironment());
for (TemplateInputVariable v : getTemplateAccessesWrappers()) {
v.setPrinter(new DefaultJavaPrettyPrinter(astElement.getFactory().getEnvironment()));
}
}
/**
* Resolves all the variables used by the snippet. The ones which are initialized and the ones
* which are not
*
* @return True if the context was extracted successfully
*/
private boolean resolveDataContext(CtStatement statement) {
needsInitialization = false;
// Check some preconditions needed for the processor to run:
// All variable access made inside the statement
List<CtVariableAccess> access = statement.getElements(new TypeFilter<>(CtVariableAccess.class));
if (statement.getElements(new TypeFilter<>(CtThisAccess.class)).size() > 0) {
mustSerializeThiz =
new Preconditions().checkTypeRef(statement.getParent(CtClass.class).getReference());
}
initialized = new HashSet<>();
// Get all THIZ field access from all invocations used in the element
HashSet<CtInvocation> visited = new HashSet<>();
Stack<CtInvocation> invStack = new Stack<>();
invStack.addAll(statement.getElements(new TypeFilter<>(CtInvocation.class)));
while (!invStack.empty()) {
CtInvocation inv = invStack.pop();
if (!visited.contains(inv)) {
visited.add(inv);
CtBlock b;
try {
b = inv.getExecutable().getDeclaration().getBody();
} catch (NullPointerException ex) {
b = null;
}
if (visibility(inv) != PUBLIC && b != null) {
for (CtFieldAccess ta :
b.getElements(new TypeFilter<CtFieldAccess>(CtFieldAccess.class))) {
if (ta.getTarget() instanceof CtThisAccess || ta.getTarget() == null) {
access.add(ta);
// initialized.add(ta);
}
}
for (CtInvocation i : b.getElements(new TypeFilter<CtInvocation>(CtInvocation.class))) {
if (!visited.contains(i)) invStack.push(i);
}
}
}
}
access = cleanRepeatedAccesses(access);
setAccesses(access);
// Find initialized variables of allowed types
ControlFlowBuilder v = new ControlFlowBuilder();
CtMethod m = statement.getParent(CtMethod.class);
if (m == null) return false;
m.accept(v);
ControlFlowGraph g = v.getResult();
g.simplify();
try {
InitializedVariables vars = new InitializedVariables();
vars.run(ControlFlowBuilder.firstNode(g, statement));
for (CtVariableAccess a : access) {
// A variable must be initialized if is local and is not a serializable field
// Also if is not a constant. Constant get declared in the body of the microbenchmark
if (isInitialized(a, statement, vars) && !isAConstant(a)) initialized.add(a);
}
} catch (NotFoundException e) {
return false;
} catch (StackOverflowError e) {
System.out.print(g.toGraphVisText());
throw e;
}
needsInitialization = initialized.size() > 0;
if (access.size() <= 0) return true;
int i = 0;
int replaced = 0;
do {
if (i == 0) replaced = 0;
CtVariableAccess a = access.get(i);
if (canBeReplacedByTarget(a)) {
CtVariableAccess targetOfA = null;
CtTargetedExpression ta = (CtTargetedExpression) a;
if (ta.getTarget() != null) {
if (ta.getTarget() instanceof CtVariableAccess) {
targetOfA = (CtVariableAccess) ta.getTarget();
} else if (ta.getTarget() instanceof CtThisAccess) {
mustSerializeThiz = true;
}
} else {
mustSerializeThiz = true;
}
if (targetOfA != null) {
if (!access.contains(targetOfA)) access.add(targetOfA);
if (initialized.contains(a) && !initialized.contains(targetOfA))
initialized.add(targetOfA);
}
access.remove(a);
if (initialized.contains(a)) initialized.remove(a);
replaced++;
} else i++;
if (i >= access.size()) i = 0;
} while (replaced > 0 || i != 0);
return true;
}
public int getLineNumber() {
if (astElement != null) lineNumber = astElement.getPosition().getLine();
return lineNumber;
}
public String getClassName() {
if (astElement != null)
className = astElement.getPosition().getCompilationUnit().getMainType().getQualifiedName();
return className;
}
