private static boolean expressionIsArrayToCollectionCopy(
PsiExpression expression, PsiVariable variable, boolean shouldBeOffsetArrayAccess) {
expression = ParenthesesUtils.stripParentheses(expression);
if (expression == null) {
return false;
}
if (!(expression instanceof PsiMethodCallExpression)) {
return false;
}
final PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression) expression;
final PsiExpressionList argumentList = methodCallExpression.getArgumentList();
final PsiExpression[] arguments = argumentList.getExpressions();
if (arguments.length != 1) {
return false;
}
final PsiReferenceExpression methodExpression = methodCallExpression.getMethodExpression();
final PsiExpression qualifier = methodExpression.getQualifierExpression();
if (!(qualifier instanceof PsiReferenceExpression)
&& !(qualifier instanceof PsiThisExpression)
&& !(qualifier instanceof PsiSuperExpression)) {
return false;
}
final PsiExpression argument = arguments[0];
final PsiType argumentType = argument.getType();
if (argumentType instanceof PsiPrimitiveType) {
return false;
}
if (SideEffectChecker.mayHaveSideEffects(argument)) {
return false;
}
if (shouldBeOffsetArrayAccess) {
if (!ExpressionUtils.isOffsetArrayAccess(argument, variable)) {
return false;
}
} else if (!VariableAccessUtils.evaluatesToVariable(argument, variable)) {
return false;
}
final PsiMethod method = methodCallExpression.resolveMethod();
if (method == null) {
return false;
}
@NonNls final String name = method.getName();
if (!name.equals("add")) {
return false;
}
final PsiClass containingClass = method.getContainingClass();
return InheritanceUtil.isInheritor(containingClass, CommonClassNames.JAVA_UTIL_COLLECTION);
}
public static boolean mayHaveSideEffects(@Nullable final PsiElement element) {
return element instanceof PsiExpression
&& SideEffectChecker.mayHaveSideEffects((PsiExpression) element);
}