private void createAssignment(CtConditional ctConditional, CtIf anIf, CtAssignment assignment) {
CtAssignment assignmentThen = assignment.clone();
assignmentThen.setAssignment(ctConditional.getThenExpression());
assignmentThen.setParent(anIf);
anIf.setThenStatement(assignmentThen);
CtAssignment assignmentElse = assignment.clone();
assignmentElse.setAssignment(ctConditional.getElseExpression());
assignmentElse.setParent(anIf);
anIf.setThenStatement(assignmentElse);
List<CtTypeReference> typeCasts = ctConditional.getTypeCasts();
for (int i = 0; i < typeCasts.size(); i++) {
CtTypeReference ctTypeReference = typeCasts.get(i);
assignmentThen.getAssignment().addTypeCast(ctTypeReference.clone());
assignmentElse.getAssignment().addTypeCast(ctTypeReference.clone());
}
anIf.setElseStatement(getFactory().Code().createCtBlock(assignmentElse));
anIf.setThenStatement(getFactory().Code().createCtBlock(assignmentThen));
}
/**
* Indicate if the statement contains a mutable expression
*
* <p>A mutability expression is an expression that assigns value to a variable in the left side
* using that variable also in the right side, like this:
*
* <p>a = a * b
*
* <p>or like this: c = a * 2 a = c + b
*
* <p>
*
* <p>Also, all unary operators and are mutable: a--; a++;
*
* @param statement Statement to check whether is a mutability expression
* @return True if it is a mutability expression
*/
private Mutability mutability(CtElement statement) {
Mutability result = Mutability.ERASABLE;
if (statement instanceof CtAssignment) {
CtAssignment e = (CtAssignment) statement;
List<CtVariableAccess> left = accessOfLeftExpression(e.getAssigned());
for (CtVariableAccess access : left) {
CtVariableReference ref = access.getVariable();
try {
if (!declaredInsideBlock.contains(ref)
&& cycleDetector.detectCyclesContainingVertex(ref)) {
return Mutability.IMMUTABLE;
}
} catch (IllegalArgumentException ex) {
continue;
}
}
}
if (containNonLocalOperatorAssignment(statement)) return Mutability.IMMUTABLE;
else if (containsNonLocalUnaryOperators(statement)) return Mutability.REPLACEABLE;
else return Mutability.ERASABLE;
}
@Override
public void process(CtConditional ctConditional) {
CtStatement parent = ctConditional.getParent(CtStatement.class);
while (!(parent.getParent() instanceof CtStatementList)) {
parent = parent.getParent(CtStatement.class);
}
CtExpression condition = ctConditional.getCondition();
CtIf anIf = getFactory().Core().createIf();
anIf.setPosition(ctConditional.getPosition());
if (parent instanceof CtReturn) {
if (!((CtReturn) parent).getReturnedExpression().equals(ctConditional)) {
return;
}
CtReturn returnThen = (CtReturn) parent.clone();
CtReturn returnElse = (CtReturn) parent.clone();
returnThen.setReturnedExpression(ctConditional.getThenExpression());
returnElse.setReturnedExpression(ctConditional.getElseExpression());
List<CtTypeReference> typeCasts = ctConditional.getTypeCasts();
for (int i = 0; i < typeCasts.size(); i++) {
CtTypeReference ctTypeReference = typeCasts.get(i);
returnThen.getReturnedExpression().addTypeCast(ctTypeReference.clone());
returnElse.getReturnedExpression().addTypeCast(ctTypeReference.clone());
}
anIf.setElseStatement(getFactory().Code().createCtBlock(returnElse));
anIf.setThenStatement(getFactory().Code().createCtBlock(returnThen));
} else if (parent instanceof CtAssignment) {
CtAssignment assignment = (CtAssignment) parent;
CtExpression ctExpression = assignment.getAssignment();
if (!ctExpression.equals(ctConditional)) {
if (ctExpression instanceof CtBinaryOperator) {
CtBinaryOperator ctBinaryOperator = (CtBinaryOperator) ctExpression;
createAssignment(ctConditional, anIf, assignment);
CtBinaryOperator cloneThen = ctBinaryOperator.clone();
CtBinaryOperator cloneElse = ctBinaryOperator.clone();
if (ctBinaryOperator.getLeftHandOperand().equals(ctConditional)) {
cloneThen.setLeftHandOperand(ctConditional.getThenExpression());
ctConditional.getThenExpression().setParent(cloneThen);
cloneElse.setLeftHandOperand(ctConditional.getElseExpression());
} else if (ctBinaryOperator.getRightHandOperand().equals(ctConditional)) {
cloneThen.setRightHandOperand(ctConditional.getThenExpression());
cloneElse.setRightHandOperand(ctConditional.getElseExpression());
}
cloneThen.getLeftHandOperand().setParent(cloneThen);
cloneElse.getLeftHandOperand().setParent(cloneElse);
((CtAssignment) ((CtBlock) anIf.getThenStatement()).getStatement(0))
.setAssignment(cloneThen);
((CtAssignment) ((CtBlock) anIf.getElseStatement()).getStatement(0))
.setAssignment(cloneElse);
} else {
return;
}
} else {
createAssignment(ctConditional, anIf, assignment);
}
} else if (parent instanceof CtLocalVariable) {
CtLocalVariable localVariable = (CtLocalVariable) parent;
if (!localVariable.getDefaultExpression().equals(ctConditional)) {
return;
}
CtLocalVariable clone = localVariable.clone();
clone.setDefaultExpression(null);
localVariable.insertBefore(clone);
CtAssignment variableAssignment =
getFactory()
.Code()
.createVariableAssignment(localVariable.getReference(), false, ctConditional);
variableAssignment.setType(localVariable.getType().clone());
variableAssignment.setPosition(ctConditional.getPosition());
createAssignment(ctConditional, anIf, variableAssignment);
} else if (parent instanceof CtInvocation) {
CtInvocation invocation = (CtInvocation) parent;
CtInvocation cloneThen = invocation.clone();
CtInvocation cloneElse = invocation.clone();
List arguments = cloneThen.getArguments();
boolean found = false;
for (int i = 0; i < arguments.size(); i++) {
Object o = arguments.get(i);
if (o.equals(ctConditional)) {
ctConditional.getThenExpression().setParent(invocation);
arguments.set(i, ctConditional.getThenExpression());
ctConditional.getElseExpression().setParent(invocation);
cloneElse.getArguments().set(i, ctConditional.getElseExpression());
found = true;
break;
}
}
if (!found) {
return;
}
cloneThen.setParent(anIf);
cloneElse.setParent(anIf);
anIf.setElseStatement(getFactory().Code().createCtBlock(cloneElse));
anIf.setThenStatement(getFactory().Code().createCtBlock(cloneThen));
} else if (parent instanceof CtConstructorCall) {
CtConstructorCall invocation = (CtConstructorCall) parent;
CtConstructorCall cloneThen = invocation.clone();
CtConstructorCall cloneElse = invocation.clone();
List arguments = cloneThen.getArguments();
boolean found = false;
for (int i = 0; i < arguments.size(); i++) {
Object o = arguments.get(i);
if (o.equals(ctConditional)) {
arguments.set(i, ctConditional.getThenExpression());
cloneElse.getArguments().set(i, ctConditional.getElseExpression());
found = true;
break;
}
}
if (!found) {
return;
}
cloneThen.setParent(anIf);
cloneElse.setParent(anIf);
anIf.setElseStatement(getFactory().Code().createCtBlock(cloneElse));
anIf.setThenStatement(getFactory().Code().createCtBlock(cloneThen));
} else if (parent instanceof CtIf) {
CtIf elem = (CtIf) parent;
if (!elem.getCondition().equals(ctConditional)) {
return;
}
CtIf cloneThen = elem.clone();
cloneThen.setParent(anIf);
CtIf cloneElse = elem.clone();
cloneElse.setParent(anIf);
cloneThen.setCondition(ctConditional.getThenExpression());
ctConditional.getThenExpression().setParent(cloneThen);
cloneElse.setCondition(ctConditional.getElseExpression());
ctConditional.getElseExpression().setParent(cloneElse);
anIf.setElseStatement(getFactory().Code().createCtBlock(cloneElse));
anIf.setThenStatement(getFactory().Code().createCtBlock(cloneThen));
} else if (parent instanceof CtThrow) {
return;
} else if (parent instanceof CtLoop) {
return;
} else if (parent instanceof CtUnaryOperator) {
return;
} else {
System.err.println(parent);
throw new RuntimeException("Other " + parent.getClass());
}
/*if(ctConditional.getThenExpression().getTypeCasts() == null ||
ctConditional.getThenExpression().getTypeCasts().isEmpty()) {
((CtExpression)anIf.getThenStatement()).setTypeCasts(ctConditional.getTypeCasts());
}
if(ctConditional.getElseExpression().getTypeCasts() == null ||
ctConditional.getElseExpression().getTypeCasts().isEmpty()) {
((CtExpression) anIf.getElseStatement())
.setTypeCasts(ctConditional.getTypeCasts());
}*/
anIf.setCondition(condition);
condition.setParent(anIf);
parent.replace(anIf);
}