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Library for use in Java components of Vespa. Shared code which do not fit anywhere else.

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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.
 *
 * 

* 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. *

* * @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 unmaskedMethods(Class testClass, Class maskedClass) { List 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 unmaskedMethodsFromSuperclass(Class testClass) { return unmaskedMethods(testClass, testClass.getSuperclass()); } }




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