netcharts.server.util
Class JarUtils

java.lang.Object
  |
  +--netcharts.server.util.JarUtils

public class JarUtils

extends java.lang.Object

Utilities for reading/writing/updating jars. Very raw. Much left to be done.

Since:

4.6

Constructor Summary

JarUtils()

Method Summary

static java.util.jar.JarOutputStream	addFileToJar(java.lang.String jarName, java.lang.String fileName, byte[] fileContents) Addes a file to a jar when supplied with the file name (jar entry name) and the file's contents.
static java.util.jar.JarOutputStream	addFileToJar(java.lang.String jarName, java.lang.String fileName, byte[] fileContents, java.util.jar.JarOutputStream jar, boolean closeJar) Adds a file to a jar when supplied with the file name (jar entry name) and the file's contents; returns the unclosed JarOutputStream if requested
static java.util.jar.JarOutputStream	addFileToJar(java.lang.String jarName, java.lang.String fileNameInJar, java.lang.String filePath, java.util.jar.JarOutputStream jar, boolean closeJar) Adds the named file to the jar.
static void	closeJar(java.util.jar.JarOutputStream jar) Closes a JarOutputStream returned by one of the other methods
static java.util.jar.JarOutputStream	copyJarExceptFile(java.lang.String fromJarFileName, java.lang.String toJarFileName, java.lang.String exceptFileName, boolean closeJar) Creates a new jar with identical contents of the old jar except the named file is not copied
static java.lang.String	extractFileFromJar(java.lang.String entryName, java.lang.String jarName) Extracts the given file from the jar and returns the file contents as a String
static void	extractFileFromJar(java.lang.String entryName, java.lang.String jarName, java.lang.String destFileName) Extracts a file from a jar and writes the file to the given destination filename

Methods inherited from class java.lang.Object

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

Constructor Detail

JarUtils

public JarUtils()

Method Detail

copyJarExceptFile

public static java.util.jar.JarOutputStream copyJarExceptFile(java.lang.String fromJarFileName,
                                                              java.lang.String toJarFileName,
                                                              java.lang.String exceptFileName,
                                                              boolean closeJar)
                                                       throws java.io.IOException

Creates a new jar with identical contents of the old jar except the named file is not copied

Throws:

java.io.IOException -

extractFileFromJar

public static void extractFileFromJar(java.lang.String entryName,
                                      java.lang.String jarName,
                                      java.lang.String destFileName)
                               throws java.io.IOException

Extracts a file from a jar and writes the file to the given destination filename

Parameters:

entryName -

jarName -

destFileName -

Throws:

java.io.IOException -

extractFileFromJar

public static java.lang.String extractFileFromJar(java.lang.String entryName,
                                                  java.lang.String jarName)
                                           throws java.io.IOException

Extracts the given file from the jar and returns the file contents as a String

Parameters:

entryName -

jarName -

Returns:

Throws:

java.io.IOException -

addFileToJar

public static java.util.jar.JarOutputStream addFileToJar(java.lang.String jarName,
                                                         java.lang.String fileName,
                                                         byte[] fileContents)
                                                  throws java.io.IOException

Addes a file to a jar when supplied with the file name (jar entry name) and the file's contents.

Parameters:

jarName -

fileName -

fileContents -

Returns:

Throws:

java.io.IOException -

addFileToJar

public static java.util.jar.JarOutputStream addFileToJar(java.lang.String jarName,
                                                         java.lang.String fileName,
                                                         byte[] fileContents,
                                                         java.util.jar.JarOutputStream jar,
                                                         boolean closeJar)
                                                  throws java.io.IOException

Adds a file to a jar when supplied with the file name (jar entry name) and the file's contents; returns the unclosed JarOutputStream if requested

Parameters:

jarName -

fileName -

fileContents -

jar -

closeJar -

Returns:

Throws:

java.io.IOException -

addFileToJar

public static java.util.jar.JarOutputStream addFileToJar(java.lang.String jarName,
                                                         java.lang.String fileNameInJar,
                                                         java.lang.String filePath,
                                                         java.util.jar.JarOutputStream jar,
                                                         boolean closeJar)
                                                  throws java.io.IOException

Adds the named file to the jar. If a non-null JarOutputStream is passed in, it is used, otherwise a new one is created, which will overwrite an existing jar.

Parameters:

jarName - the jar to add to

fileNameInJar - file name to add to the jar; any path component will be reflected within the jar

filePath - fully-qualified name fo the file to read

jar - optional open JarOutputStream; if null a new one will be created

closeJar - whether the JarOutputStream should be closed after the file is added

Returns:

an open JarOutputStream if the closeJar param is true, otherwise null

Throws:

java.io.IOException -

closeJar

public static void closeJar(java.util.jar.JarOutputStream jar)
                     throws java.io.IOException

Closes a JarOutputStream returned by one of the other methods

Parameters:

jar -

Throws:

java.io.IOException -