ecki commented on a change in pull request #358:
ClassUtils.getBaseClasses(desiredBase, packageName)
URL: https://github.com/apache/commons-lang/pull/358#discussion_r244365537
##########
File path: src/main/java/org/apache/commons/lang3/ClassUtils.java
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@@ -1059,6 +1067,85 @@ public static boolean isInnerClass(final Class<?> cls) {
return getClass(loader, className, initialize);
}
+ /**
+ * Returns a list of base classes/interfaces underneath the supplied
package.
+ * This method only retrieves base classes/interfaces that have child
classes that can be instantiated
+ * via a no-args constructor.
+ * This only retrieves base classes/interfaces directly underneath the
supplied package.
+ *
+ * @param desiredBase the desired base class/interface to retrieve
+ * @param packageName the package name in the standard import format (i.e.
"java.lang.String")
+ * @param classLoader the class loader to use for retrieving classes
+ * @param <T> The desired base class or interface type to retrieve
+ * @return a list of base classes/interfaces that match the supplied type
underneath the supplied package
+ * @throws IllegalArgumentException if the packageName is invalid
+ * @throws IOException if an I/O error occurs in getting a new directory
stream
+ * @throws NullPointerException if desiredBase, classLoader or url are null
+ * @throws URISyntaxException if the generated url can't be converted to a
URI
+ */
+ public static <T> List<T> getBaseClasses(final Class<T> desiredBase, final
String packageName, ClassLoader classLoader)
+ throws IllegalArgumentException, IOException,
NullPointerException, URISyntaxException {
+
+ Objects.requireNonNull(desiredBase, "desiredBase must not be null");
+
+ if (StringUtils.isBlank(packageName)) {
+ throw new IllegalArgumentException("packageName must not be
blank");
+ }
+
+ Objects.requireNonNull(classLoader, "classLoader must not be null");
+
+ URL url = classLoader.getResource(packageName.replaceAll("[.]", "/"));
+ Objects.requireNonNull(url, "supplied package not found");
+
+ Path classesPath = Paths.get(url.toURI());
Review comment:
Will that work with jmod or jar files or only with class directories?
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