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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.plugin.util;
import java.io.File;
import java.io.InputStream;
import java.util.Optional;
import java.util.jar.JarFile;
import java.util.jar.Manifest;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
/**
* @author Tony Vaagenes
* @author ollivir
*/
public class JarFiles {
public static <T> T withJarFile(File file, ThrowingFunction<JarFile, T> action) {
try (JarFile jar = new JarFile(file)) {
return action.apply(jar);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static <T> T withInputStream(ZipFile zipFile, ZipEntry zipEntry, ThrowingFunction<InputStream, T> action) {
try (InputStream is = zipFile.getInputStream(zipEntry)) {
return action.apply(is);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static Optional<Manifest> getManifest(File jarFile) {
return withJarFile(jarFile, jar -> Optional.ofNullable(jar.getManifest()));
}
}
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