diff options
Diffstat (limited to 'bundle-plugin/src/main/java/com/yahoo/container/plugin/util/JarFiles.java')
-rw-r--r-- | bundle-plugin/src/main/java/com/yahoo/container/plugin/util/JarFiles.java | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/bundle-plugin/src/main/java/com/yahoo/container/plugin/util/JarFiles.java b/bundle-plugin/src/main/java/com/yahoo/container/plugin/util/JarFiles.java new file mode 100644 index 00000000000..398b2f5a72a --- /dev/null +++ b/bundle-plugin/src/main/java/com/yahoo/container/plugin/util/JarFiles.java @@ -0,0 +1,36 @@ +// Copyright 2018 Yahoo Holdings. 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())); + } +} |