87 lines
3.9 KiB
Java
87 lines
3.9 KiB
Java
/*
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* Copyright (c) 2022, 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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import jdk.internal.jimage.ImageReader;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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/**
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* @test
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* @bug 8247407
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* @summary Test that ImageReader doesn't create a Directory node with duplicate children
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* @modules java.base/jdk.internal.jimage
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* @run main ImageReaderDuplicateChildNodesTest
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*/
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public class ImageReaderDuplicateChildNodesTest {
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/**
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* Uses the ImageReader to open and read the JAVA_HOME/lib/modules image. Tests that the
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* {@link ImageReader#findNode(String)} corresponding to a directory doesn't return a node
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* with duplicate children in it.
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*/
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public static void main(final String[] args) throws Exception {
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final Path imagePath = Paths.get(System.getProperty("java.home"), "lib", "modules");
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if (!Files.exists(imagePath)) {
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// skip the testing in the absence of the image file
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System.err.println("Skipping test since " + imagePath + " is absent");
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return;
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}
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System.out.println("Running test against image " + imagePath);
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final String integersParentResource = "/modules/java.base/java/lang";
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final String integerResource = integersParentResource + "/Integer.class";
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try (final ImageReader reader = ImageReader.open(imagePath)) {
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// find the child node/resource first
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final ImageReader.Node integerNode = reader.findNode(integerResource);
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if (integerNode == null) {
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throw new RuntimeException("ImageReader could not locate " + integerResource
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+ " in " + imagePath);
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}
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// now find the parent node (which will represent a directory)
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final ImageReader.Node parent = reader.findNode(integersParentResource);
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if (parent == null) {
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throw new RuntimeException("ImageReader could not locate " + integersParentResource
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+ " in " + imagePath);
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}
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// now verify that the parent node which is a directory, doesn't have duplicate children
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final List<ImageReader.Node> children = parent.getChildren();
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if (children == null || children.isEmpty()) {
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throw new RuntimeException("ImageReader did not return any child resources under "
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+ integersParentResource + " in " + imagePath);
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}
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final Set<ImageReader.Node> uniqueChildren = new HashSet<>();
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for (final ImageReader.Node child : children) {
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final boolean unique = uniqueChildren.add(child);
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if (!unique) {
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throw new RuntimeException("ImageReader returned duplicate child resource "
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+ child + " under " + parent + " from image " + imagePath);
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}
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}
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}
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}
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}
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