Package com.atlassian.plugin.osgi.internal.factory.transform

Class JarUtils

java.lang.Object

com.atlassian.plugin.osgi.internal.factory.transform.JarUtils

public final class JarUtils
extends Object

Utility methods for getting stuff out of a jar.

Since:

2.6

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	JarUtils.Extractor<T>

Method Summary

Modifier and Type	Method	Description
static void	closeQuietly(JarFile jarFile)	Quietly close jar file.
static Manifest	getManifest(File file)	Get the Manifest from a Jar file, or create a new one if there isn't one already.
static boolean	hasManifestEntry(Manifest manifest, String entryName)
static <T> T	withJar(File file, JarUtils.Extractor<T> extractor)	Extract something from a jar file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getManifest

public static Manifest getManifest(File file)

Get the Manifest from a Jar file, or create a new one if there isn't one already.

Parameters:

file - the file that is the jar contents

Returns:

the manifest or an empty new one if one can't be found.

hasManifestEntry

public static boolean hasManifestEntry(Manifest manifest,
 String entryName)

withJar

public static <T> T withJar(File file,
 JarUtils.Extractor<T> extractor)

Extract something from a jar file.

Correctly opens and closes the Jar file. Must not lazily access the Jar as it has an open/closed state.

Type Parameters:

T - the type of the thing to extract

Parameters:

file - the file that is the jar contents

extractor - the extractor function to apply

Returns:

the result of the extractor

Throws:

RuntimeException - if there are problems accessing the jar contents.

closeQuietly

public static void closeQuietly(JarFile jarFile)

Quietly close jar file.

Parameters:

jarFile - the file to close.