66 lines
2.2 KiB
Java
66 lines
2.2 KiB
Java
/*
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* Copyright (c) 2023, Red Hat, Inc.
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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 java.io.IOException;
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import java.nio.file.Path;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import jdk.internal.jimage.BasicImageReader;
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import jdk.internal.jimage.ImageLocation;
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/**
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*
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* JDK Modular image iterator
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*/
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public class JImageHelper {
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private JImageHelper() {
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// Don't instantiate
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}
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public static List<String> listContents(Path jimage) throws IOException {
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try(BasicImageReader reader = BasicImageReader.open(jimage)) {
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List<String> entries = new ArrayList<>();
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for (String s : reader.getEntryNames()) {
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entries.add(s);
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}
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Collections.sort(entries);
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return entries;
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}
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}
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public static byte[] getLocationBytes(String location, Path jimage) throws IOException {
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try(BasicImageReader reader = BasicImageReader.open(jimage)) {
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ImageLocation il = reader.findLocation(location);
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byte[] r = reader.getResource(il);
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if (r == null) {
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throw new IllegalStateException(String.format("bytes for %s not found!", location));
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}
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return r;
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}
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}
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}
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