Package org.apache.commons.compress.compressors.pack200

Class Pack200Utils

java.lang.Object

org.apache.commons.compress.compressors.pack200.Pack200Utils

public class Pack200Utils
extends Object

Utility methods for Pack200.

Since:

1.3

This class is thread-safe

Method Summary

Modifier and Type	Method	Description
static void	normalize(File jar)	Normalizes a JAR archive in-place, so it can be safely signed and packed.
static void	normalize(File from, File to)	Normalizes a JAR archive, so it can be safely signed and packed.
static void	normalize(File from, File to, Map<String,String> props)	Normalizes a JAR archive, so it can be safely signed and packed.
static void	normalize(File jar, Map<String,String> props)	Normalizes a JAR archive in-place, so it can be safely signed and packed.

Methods inherited from class java.lang.Object

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

Method Details

normalize

public static void normalize(File jar)
                      throws IOException

Normalizes a JAR archive in-place, so it can be safely signed and packed.

As stated in Pack200.Packer's javadocs applying a Pack200 compression to a JAR archive will in general make its signatures invalid. In order to prepare a JAR for signing it should be "normalized" by packing and unpacking it. This is what this method does.

Note this methods implicitly sets the segment length to -1.

Parameters:

jar - the JAR archive to normalize

Throws:

IOException - if reading or writing fails

normalize

public static void normalize(File from,
 File to)
                      throws IOException

Normalizes a JAR archive, so it can be safely signed and packed.

As stated in Pack200.Packer's javadocs applying a Pack200 compression to a JAR archive will in general make its signatures invalid. In order to prepare a JAR for signing it should be "normalized" by packing and unpacking it. This is what this method does.

This method does not replace the existing archive but creates a new one.

Note this methods implicitly sets the segment length to -1.

Parameters:

from - the JAR archive to normalize

to - the normalized archive

Throws:

IOException - if reading or writing fails

normalize

public static void normalize(File from,
 File to,
 Map<String,String> props)
                      throws IOException

Normalizes a JAR archive, so it can be safely signed and packed.

As stated in Pack200.Packer's javadocs applying a Pack200 compression to a JAR archive will in general make its signatures invalid. In order to prepare a JAR for signing it should be "normalized" by packing and unpacking it. This is what this method does.

This method does not replace the existing archive but creates a new one.

Parameters:

from - the JAR archive to normalize

to - the normalized archive

props - properties to set for the pack operation. This method will implicitly set the segment limit to -1.

Throws:

IOException - if reading or writing fails

normalize

public static void normalize(File jar,
 Map<String,String> props)
                      throws IOException

Normalizes a JAR archive in-place, so it can be safely signed and packed.

As stated in Pack200.Packer's javadocs applying a Pack200 compression to a JAR archive will in general make its signatures invalid. In order to prepare a JAR for signing it should be "normalized" by packing and unpacking it. This is what this method does.

Parameters:

jar - the JAR archive to normalize

props - properties to set for the pack operation. This method will implicitly set the segment limit to -1.

Throws:

IOException - if reading or writing fails