/
NestedJarArchive.java
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/
NestedJarArchive.java
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/**
* Copyright (C) 2006-2024 Talend Inc. - www.talend.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.talend.sdk.component.runtime.manager.xbean;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Iterator;
import java.util.jar.JarInputStream;
import java.util.zip.ZipEntry;
import org.apache.xbean.finder.archive.Archive;
import org.talend.sdk.component.classloader.ConfigurableClassLoader;
import lombok.Getter;
import lombok.RequiredArgsConstructor;
@RequiredArgsConstructor
public class NestedJarArchive implements Archive, AutoCloseable {
@Getter
private final URL rootMarker;
private final JarInputStream jarStream;
// this classloader already handles all the logic we need
private final ConfigurableClassLoader loader;
@Override
public InputStream getBytecode(final String className) {
return loader.getResourceAsStream(className);
}
@Override
public Class<?> loadClass(final String className) throws ClassNotFoundException {
return loader.loadClass(className);
}
@Override
public Iterator<Entry> iterator() {
return new Iterator<Entry>() {
private ZipEntry entry;
@Override
public boolean hasNext() {
if (entry == null) {
try {
while ((entry = jarStream.getNextEntry()) != null && !entry.getName().endsWith(".class")) {
// next
}
} catch (final IOException e) {
throw new IllegalStateException("Invalid nested jar", e);
}
}
return entry != null;
}
@Override
public Entry next() {
final ZipEntry returned = entry;
entry = null;
final String name = returned
.getName()
.replace('.', '/')
.substring(0, returned.getName().length()
- (returned.getName().endsWith(".class") ? ".class".length() : 0));
return new Entry() {
@Override
public String getName() {
return name;
}
@Override
public InputStream getBytecode() {
return new KeepingOpenInputStream(jarStream);
}
};
}
};
}
@Override
public void close() throws Exception {
jarStream.close();
}
}