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/*
* Copyright (c) 2023, Red Hat, Inc.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.IOException;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import jdk.internal.jimage.BasicImageReader;
import jdk.internal.jimage.ImageLocation;
/**
*
* JDK Modular image iterator
*/
public class JImageHelper {
private JImageHelper() {
// Don't instantiate
}
public static List<String> listContents(Path jimage) throws IOException {
try(BasicImageReader reader = BasicImageReader.open(jimage)) {
List<String> entries = new ArrayList<>();
for (String s : reader.getEntryNames()) {
entries.add(s);
}
Collections.sort(entries);
return entries;
}
}
public static byte[] getLocationBytes(String location, Path jimage) throws IOException {
try(BasicImageReader reader = BasicImageReader.open(jimage)) {
ImageLocation il = reader.findLocation(location);
byte[] r = reader.getResource(il);
if (r == null) {
throw new IllegalStateException(String.format("bytes for %s not found!", location));
}
return r;
}
}
}
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