org.apache.commons.compress.compressors.pack200

Class Pack200Utils


  • public class Pack200Utils
extends Object
    Utility methods for Pack200.
    Since:
    1.3

    • Method Detail

      • 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 sigantures 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

      • 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 sigantures 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

      • 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 sigantures 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

      • 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 sigantures 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