private static boolean containsAllCases(GrSwitchStatement statement) {
final GrCaseSection[] sections = statement.getCaseSections();
for (GrCaseSection section : sections) {
if (section.isDefault()) return true;
}
final GrExpression condition = statement.getCondition();
if (!(condition instanceof GrReferenceExpression)) return false;
PsiType type = TypesUtil.unboxPrimitiveTypeWrapper(getNominalTypeNoRecursion(condition));
if (type == null) return false;
if (type instanceof PsiPrimitiveType) {
if (type == PsiType.BOOLEAN) return sections.length == 2;
if (type == PsiType.BYTE || type == PsiType.CHAR) return sections.length == 128;
return false;
}
if (type instanceof PsiClassType) {
final PsiClass resolved = ((PsiClassType) type).resolve();
if (resolved != null && resolved.isEnum()) {
int enumConstantCount = 0;
final PsiField[] fields = resolved.getFields();
for (PsiField field : fields) {
if (field instanceof PsiEnumConstant) enumConstantCount++;
}
if (sections.length == enumConstantCount) return true;
}
}
return false;
}
private static boolean switchStatementsAreEquivalent(
@NotNull GrSwitchStatement statement1, @NotNull GrSwitchStatement statement2) {
final GrExpression switchExpression1 = statement1.getCondition();
final GrExpression switchExpression2 = statement2.getCondition();
if (!expressionsAreEquivalent(switchExpression1, switchExpression2)) {
return false;
}
final GrCaseSection[] clauses1 = statement1.getCaseSections();
final GrCaseSection[] clauses2 = statement2.getCaseSections();
if (clauses1.length != clauses2.length) {
return false;
}
for (int i = 0; i < clauses1.length; i++) {
final GrCaseSection clause1 = clauses1[i];
final GrCaseSection clause2 = clauses2[i];
if (!caseClausesAreEquivalent(clause1, clause2)) {
return false;
}
}
return true;
}
public void visitSwitchStatement(GrSwitchStatement switchStatement) {
final GrCondition condition = switchStatement.getCondition();
if (condition != null) {
condition.accept(this);
}
final InstructionImpl instruction = startNode(switchStatement);
final GrCaseSection[] sections = switchStatement.getCaseSections();
if (!containsAllCases(switchStatement)) {
addPendingEdge(switchStatement, instruction);
}
for (GrCaseSection section : sections) {
myHead = instruction;
section.accept(this);
}
finishNode(instruction);
}
@Override
public void visitSwitchStatement(GrSwitchStatement switchStatement) {
final GrCaseSection[] sections = switchStatement.getCaseSections();
List<PsiType> types = new ArrayList<PsiType>(sections.length);
for (GrCaseSection section : sections) {
final GrExpression value = section.getCaseLabel().getValue();
final PsiType type = value != null ? value.getType() : null;
if (type != null) types.add(type);
}
final PsiType upperBoundNullable =
TypesUtil.getLeastUpperBoundNullable(types, switchStatement.getManager());
if (upperBoundNullable == null) return;
myResult = new TypeConstraint[] {SubtypeConstraint.create(upperBoundNullable)};
}
private static boolean isLastStatementInCaseSection(
GrCaseSection caseSection, GrSwitchStatement switchStatement) {
final GrCaseSection[] sections = switchStatement.getCaseSections();
final int i = ArrayUtilRt.find(sections, caseSection);
if (i == sections.length - 1) {
return true;
}
for (int j = i + 1; j < sections.length; j++) {
GrCaseSection section = sections[j];
for (GrStatement statement : section.getStatements()) {
if (!(statement instanceof GrBreakStatement)) {
return false;
}
}
}
return true;
}