95 lines
3.5 KiB
Java
95 lines
3.5 KiB
Java
/*
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* Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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package invokeinterface;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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public class Checker extends shared.Checker {
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private Class interfaceClass;
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public Checker(Class interfaceClass, Class dynamicTargetClass) {
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super(interfaceClass, dynamicTargetClass);
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if (staticTargetClass.isInterface()) {
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this.interfaceClass = staticTargetClass;
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} else {
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throw new RuntimeException("Static target class should be an interface.");
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}
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}
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public String check (Class callerClass) {
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// Check access rights to interface for caller
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if (!checkAccess(interfaceClass, callerClass)) {
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return "java.lang.IllegalAccessError";
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}
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// NSME is thrown when interface doesn't declare the method
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if (getDeclaredMethod(interfaceClass) == null) {
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return "java.lang.NoSuchMethodError";
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}
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// 9.1.5 Access to Interface Member Names
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// "All interface members are implicitly public. They are
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// accessible outside the package where the interface is
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// declared if the interface is also declared public or
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// protected, in accordance with the rules of 6.6."
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// Search for method declaration in the hierarchy
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Class klass = dynamicTargetClass;
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while (klass != Object.class) {
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Method method = getDeclaredMethod(klass);
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if (method != null) {
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int modifiers = method.getModifiers();
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// Check whether obtained method is public and isn't abstract
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if ( Modifier.isPublic(modifiers)) {
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if (Modifier.isAbstract(modifiers)) {
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return "java.lang.AbstractMethodError";
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} else {
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return String.format("%s.%s",
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method.getDeclaringClass().getSimpleName(),
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methodName);
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}
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} else {
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// IAE is thrown when located method isn't PUBLIC
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// or private. Private methods are skipped when
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// looking for an interface method.
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if (!Modifier.isPrivate(modifiers)) {
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return "java.lang.IllegalAccessError";
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}
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}
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}
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klass = klass.getSuperclass();
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}
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// No method declaration is found
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return "java.lang.AbstractMethodError";
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}
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}
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