public abstract class CustomTypeSafeMatcher<T>
extends TypeSafeMatcher<T>

Utility class for writing one off matchers. For example:

 Matcher<String> aNonEmptyString = new CustomTypeSafeMatcher<String>("a non empty string") {
   public boolean matchesSafely(String string) {
     return !string.isEmpty();
   }
   public void describeMismatchSafely(String string, Description mismatchDescription) {
     mismatchDescription.appendText("was empty");
   }
 };
 

This is a variant of CustomMatcher that first type checks the argument being matched. By the time TypeSafeMatcher.matchesSafely(T) is is called the argument is guaranteed to be non-null and of the correct type.