protected List<List<Statement>> buildContext(
InputContext inputContext, List<Statement> stmts, int targetIndex) {
VarCartesianProduct varCartesianProduct = new VarCartesianProduct();
Statement statement = stmts.get(targetIndex);
for (CtVariableReference var : statement.getInputContext().getVar()) {
varCartesianProduct.addReplaceVar(var, valueCreator.createNull(var.getType()));
List<CtVariableReference> candidates = inputContext.allCandidate(var.getType(), true, false);
if (!candidates.isEmpty()) {
varCartesianProduct.addReplaceVar(
var, candidates.get(AmplificationHelper.getRandom().nextInt(candidates.size())));
}
Statement cfLocalVar = getLocalVar(var.getType(), inputContext);
if (cfLocalVar != null) {
varCartesianProduct.addReplaceVar(var, cfLocalVar);
}
CtLocalVariable localVariable =
createLocalVarFromMethodLiterals(currentMethod, var.getType());
if (localVariable != null) {
varCartesianProduct.addReplaceVar(var, localVariable);
}
CtLocalVariable randomVar = valueCreator.createRandomLocalVar(var.getType());
if (randomVar != null) {
varCartesianProduct.addReplaceVar(var, randomVar);
}
}
return varCartesianProduct.apply(stmts, targetIndex);
}
protected boolean isValidCodeFragment(Statement cf) {
CtCodeElement codeElement = cf.getCtCodeFragment();
if (CtLocalVariable.class.isInstance(codeElement)) {
Object defaultExpression = ((CtLocalVariable) codeElement).getDefaultExpression();
return defaultExpression != null;
}
return false;
}
protected Statement getLocalVar(CtTypeReference type, InputContext inputContext) {
List<Statement> list =
localVars
.stream()
.filter(var -> var.getCtCodeFragment() != null)
.filter(var -> type.equals(((CtLocalVariable) var.getCtCodeFragment()).getType()))
.filter(
var ->
inputContext.getVariableOrFieldNamed(
((CtLocalVariable) var.getCtCodeFragment()).getSimpleName())
== null)
.collect(Collectors.toList());
if (list.isEmpty()) {
return null;
} else {
boolean localVarFind;
while (!list.isEmpty()) {
Statement localVar = list.remove(AmplificationHelper.getRandom().nextInt(list.size()));
localVarFind = true;
for (CtVariableReference var : localVar.getInputContext().getVar()) {
CtVariableReference<?> candidate = inputContext.candidate(var.getType(), true);
if (candidate == null) {
localVarFind = false;
break;
}
}
if (localVarFind) {
Statement cloneLocalVar = localVar.clone();
for (CtVariableReference var : localVar.getInputContext().getVar()) {
try {
CtVariableReference variable =
cloneLocalVar.getInputContext().getVariableOrFieldNamed(var.getSimpleName());
cloneLocalVar
.getInputContext()
.getVariableOrFieldNamed(var.getSimpleName())
.replace(variable);
} catch (Exception e) {
continue;
}
return cloneLocalVar;
}
}
}
return null;
}
}