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 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