Solving peculiar 'unchecked cast' warning

Camp bell :

I have an object where the type of generic T is lost at some point through a giant interface chain. I was wondering if it is possible to use a function to regain some type safety by checking the types:

private T metaData; // type of T is lost
public <R> R getMetaData(Class<R> className) {
    assert className.isInstance(metaData);
    return (R) metaData;
}

However, this implementation produces an "Unchecked cast: 'T' to 'R'" warning. Is there an implementation that avoids this warning, or is the only solution to suppress it?

Elliott Frisch :

You don't have to cast to R with (), you could use the Class directly instead. Like,

return className.cast(metaData);

which doesn't cause any warnings here.

Guess you like

Origin http://10.200.1.11:23101/article/api/json?id=475391&siteId=1

Solving peculiar 'unchecked cast' warning

Eliminate unchecked cast Warning

Java - Unchecked Cast Warning background, causes, and solutions

How cast to (known) generic type without "unchecked" warning?

Java: Solving unchecked call

Removing unchecked cast warnings with generics

Unchecked cast behavior with and without assignment to variable

How to fix 'Unchecked cast from MyClass to T'

Unchecked cast from generic type to the same type

Unchecked cast from X to generic type that extends X

Unchecked cast on a Map<String, Object> (JSON converted to Map with Jackson)

IntelliJ warning: Unchecked generics array creation for varargs parameter

[VS / C++] #pragma warning(disable:4996) Cannot eliminate C4996 std::copy::_Unchecked_iterators::_Deprecate solution

Pip install appears WARNING: Ignoring invalid distribution problem solving

Java - Unchecked Cast Предупреждение фон, причины и решения

warning: passing argument 1 of ‘fun1‘ makes integer from pointer without a cast [-Wint-conversion]

peculiar|retreated|civilize|conceivable

Peculiar behavior of split() of string class

uniapp console warning DevTools failed to load SourceMap: Could not load content for http://127.0.0.1 problem solving

@suppresswarnings (unchecked) role

Select the style changes and unchecked

iNode security check unchecked

Unchecked or unsafe operation was used

Checked and unchecked exceptions in java

Checked and unchecked of Java exceptions

jquery radio checked and unchecked

Checked and unchecked exceptions

7.1 Why use bulk peculiar json format?

Class.getDeclaredMethods() of reflection peculiar behavior

Perl: What are its peculiar autovivafacation properties?