Method getSubtype

output/java_guava/1.4.19/TypeToken.java:411–429

Returns subtype of this with subclass as the raw class. For example, if this is Iterable and subclass is List, List is returned.

(Class<?> subclass)

  public final TypeToken<? extends T> getSubtype(Class<?> subclass) {
    checkArgument(
!(runtimeType instanceof TypeVariable),
"Cannot get subtype of type variable <%s>",
this);
    if (runtimeType instanceof WildcardType) {
      return getSubtypeFromLowerBounds(subclass, ((WildcardType) runtimeType).getLowerBounds());
    }
    // unwrap array type if necessary
    if (isArray()) {
      return getArraySubtype(subclass);
    }
    // At this point, it's either a raw class or parameterized type.
    checkArgument(getRawType().isAssignableFrom(subclass), "%s isn't a subclass of %s", subclass, this);
    Type resolvedTypeArgs = resolveTypeArgsForSubclass(subclass);
    @SuppressWarnings("unchecked") // guarded by the isAssignableFrom() statement above
    TypeToken<? extends T> subtype = (TypeToken<? extends T>) of(resolvedTypeArgs);
    return subtype;
  }

  /**
   * Returns true if this type is a supertype of the given {@code type}. "Supertype" is defined