@Override
public void visitNewExpression(PsiNewExpression expression) {
super.visitNewExpression(expression);
final PsiJavaCodeReferenceElement classReference = expression.getClassReference();
if (classReference == null) {
return;
}
final String name = classReference.getReferenceName();
if (!"BigDecimal".equals(name)) {
return;
}
final PsiMethod constructor = expression.resolveConstructor();
if (constructor == null) {
return;
}
final PsiParameterList parameterList = constructor.getParameterList();
final int length = parameterList.getParametersCount();
if (length != 1 && length != 2) {
return;
}
final PsiParameter[] parameters = parameterList.getParameters();
final PsiParameter firstParameter = parameters[0];
final PsiType type = firstParameter.getType();
if (type != PsiType.DOUBLE) {
return;
}
registerNewExpressionError(expression);
}
public InspectionGadgetsFix buildFix(Object... infos) {
final PsiNewExpression expression = (PsiNewExpression) infos[0];
final PsiJavaCodeReferenceElement classReference = expression.getClassReference();
assert classReference != null;
final String className = classReference.getText();
return new CachedNumberConstructorCallFix(className);
}
private static boolean newExpressionsAreEquivalent(
@NotNull PsiNewExpression newExpression1, @NotNull PsiNewExpression newExpression2) {
final PsiJavaCodeReferenceElement classReference1 = newExpression1.getClassReference();
final PsiJavaCodeReferenceElement classReference2 = newExpression2.getClassReference();
if (classReference1 == null || classReference2 == null) {
return false;
}
final String text = classReference1.getText();
if (!text.equals(classReference2.getText())) {
return false;
}
final PsiExpression[] arrayDimensions1 = newExpression1.getArrayDimensions();
final PsiExpression[] arrayDimensions2 = newExpression2.getArrayDimensions();
if (!expressionListsAreEquivalent(arrayDimensions1, arrayDimensions2)) {
return false;
}
final PsiArrayInitializerExpression arrayInitializer1 = newExpression1.getArrayInitializer();
final PsiArrayInitializerExpression arrayInitializer2 = newExpression2.getArrayInitializer();
if (!expressionsAreEquivalent(arrayInitializer1, arrayInitializer2)) {
return false;
}
final PsiExpression qualifier1 = newExpression1.getQualifier();
final PsiExpression qualifier2 = newExpression2.getQualifier();
if (!expressionsAreEquivalent(qualifier1, qualifier2)) {
return false;
}
final PsiExpressionList argumentList1 = newExpression1.getArgumentList();
final PsiExpression[] args1;
if (argumentList1 == null) {
args1 = null;
} else {
args1 = argumentList1.getExpressions();
}
final PsiExpressionList argumentList2 = newExpression2.getArgumentList();
final PsiExpression[] args2;
if (argumentList2 == null) {
args2 = null;
} else {
args2 = argumentList2.getExpressions();
}
return expressionListsAreEquivalent(args1, args2);
}
static boolean isSideEffectFreeConstructor(PsiNewExpression newExpression) {
PsiJavaCodeReferenceElement classReference = newExpression.getClassReference();
PsiClass aClass = classReference == null ? null : (PsiClass) classReference.resolve();
String qualifiedName = aClass == null ? null : aClass.getQualifiedName();
if (qualifiedName == null) return false;
if (ourSideEffectFreeClasses.contains(qualifiedName)) return true;
PsiFile file = aClass.getContainingFile();
PsiDirectory directory = file.getContainingDirectory();
PsiPackage classPackage = JavaDirectoryService.getInstance().getPackage(directory);
String packageName = classPackage == null ? null : classPackage.getQualifiedName();
// all Throwable descendants from java.lang are side effects free
if ("java.lang".equals(packageName) || "java.io".equals(packageName)) {
PsiClass throwableClass =
JavaPsiFacade.getInstance(aClass.getProject())
.findClass("java.lang.Throwable", aClass.getResolveScope());
if (throwableClass != null
&& InheritanceUtil.isInheritorOrSelf(aClass, throwableClass, true)) {
return true;
}
}
return false;
}
