75 lines
2.5 KiB
Java
75 lines
2.5 KiB
Java
/*
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* Copyright (c) 2021, 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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* @test
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* @bug 8272564
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* @summary Correct resolution of toString() (and other similar calls) on interfaces
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* @enablePreview
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* @compile NoObjectToString.java
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* @run main NoObjectToString
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*/
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import java.io.*;
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import java.lang.classfile.*;
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import java.lang.classfile.constantpool.*;
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public class NoObjectToString {
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public static void main(String... args) throws Exception {
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NoObjectToString c = new NoObjectToString();
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c.run(args);
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}
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void run(String... args) throws Exception {
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//Verify there are no references to Object.toString() in a Test:
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try (InputStream in = NoObjectToString.class.getResourceAsStream("NoObjectToString$Test.class")) {
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assert in != null;
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ClassModel cm = ClassFile.of().parse(in.readAllBytes());
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for (PoolEntry pe : cm.constantPool()) {
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if (pe instanceof MethodRefEntry ref) {
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String methodDesc = ref.owner().name() + "." + ref.nameAndType().name() + ":" + ref.nameAndType().type();
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if ("java/lang/Object.toString:()Ljava/lang/String;".equals(methodDesc)) {
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throw new AssertionError("Found call to j.l.Object.toString");
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}
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}
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}
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}
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}
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class Test {
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void test(I i, J j, K k) {
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i.toString();
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j.toString();
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k.toString();
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}
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}
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interface I {
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public String toString();
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}
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interface J extends I {}
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interface K {}
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}
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