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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.protect;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
/**
* Static utility methods to validate class properties.
*
* <p>
* Do note, this class will not be a reliable guarantee for correctness if you
* have a forest of methods only differing by return type (as
* contradistinguished from name and argument types), the current implementation
* is minimal.
* </p>
*
* @author Steinar Knutsen
*/
public final class ClassValidator {
/**
* Check all protected, public and package private declared methods of
* maskedClass is implemented in testClass. Note, this will by definition
* blow up on final methods in maskedClass.
*
* @param testClass class which wraps or masks another class
* @param maskedClass class which is masked or wrapped
* @return the methods which seem to miss from testClass to be complete
*/
public static List<Method> unmaskedMethods(Class<?> testClass,
Class<?> maskedClass) {
List<Method> unmasked = new ArrayList<>();
Method[] methodsToMask = maskedClass.getDeclaredMethods();
for (Method m : methodsToMask) {
int modifiers = m.getModifiers();
if (Modifier.isPrivate(modifiers)) {
continue;
}
try {
testClass.getDeclaredMethod(m.getName(), m.getParameterTypes());
} catch (NoSuchMethodException e) {
unmasked.add(m);
}
}
return unmasked;
}
/**
* Check testClass overrides all protected, public and package private
* methods of its immediate super class. See unmaskedMethods().
*
* @param testClass the class to check whether completely masks its super class
* @return the methods missing from testClass to completely override its
* immediate super class
*/
public static List<Method> unmaskedMethodsFromSuperclass(Class<?> testClass) {
return unmaskedMethods(testClass, testClass.getSuperclass());
}
}
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