Package org.apache.activemq.console.command.store.tar

Class TarUtils

java.lang.Object
org.apache.activemq.console.command.store.tar.TarUtils
public class TarUtils extends Object
This class provides static utility methods to work with byte streams.

  • Constructor Summary

    Constructors
    Constructor
    Description
    TarUtils()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static long
    computeCheckSum(byte[] buf)
    Compute the checksum of a tar entry header.
    static int
    getCheckSumOctalBytes(long value, byte[] buf, int offset, int length)
    Parse the checksum octal integer from a header buffer.
    static int
    getLongOctalBytes(long value, byte[] buf, int offset, int length)
    Parse an octal long integer from a header buffer.
    static int
    getNameBytes(StringBuffer name, byte[] buf, int offset, int length)
    Determine the number of bytes in an entry name.
    static int
    getOctalBytes(long value, byte[] buf, int offset, int length)
    Parse an octal integer from a header buffer.
    static StringBuffer
    parseName(byte[] header, int offset, int length)
    Parse an entry name from a header buffer.
    static long
    parseOctal(byte[] header, int offset, int length)
    Parse an octal string from a header buffer.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • TarUtils

      public TarUtils()

  • Method Details

    • parseOctal

      public static long parseOctal(byte[] header, int offset, int length)
      Parse an octal string from a header buffer. This is used for the file permission mode value.
      Parameters:
      header - The header buffer from which to parse.
      offset - The offset into the buffer from which to parse.
      length - The number of header bytes to parse.
      Returns:
      The long value of the octal string.

    • parseName

      public static StringBuffer parseName(byte[] header, int offset, int length)
      Parse an entry name from a header buffer.
      Parameters:
      header - The header buffer from which to parse.
      offset - The offset into the buffer from which to parse.
      length - The number of header bytes to parse.
      Returns:
      The header's entry name.

    • getNameBytes

      public static int getNameBytes(StringBuffer name, byte[] buf, int offset, int length)
      Determine the number of bytes in an entry name.
      Parameters:
      name - The header name from which to parse.
      buf - The buffer from which to parse.
      offset - The offset into the buffer from which to parse.
      length - The number of header bytes to parse.
      Returns:
      The number of bytes in a header's entry name.

    • getOctalBytes

      public static int getOctalBytes(long value, byte[] buf, int offset, int length)
      Parse an octal integer from a header buffer.
      Parameters:
      value - The header value
      buf - The buffer from which to parse.
      offset - The offset into the buffer from which to parse.
      length - The number of header bytes to parse.
      Returns:
      The integer value of the octal bytes.

    • getLongOctalBytes

      public static int getLongOctalBytes(long value, byte[] buf, int offset, int length)
      Parse an octal long integer from a header buffer.
      Parameters:
      value - The header value
      buf - The buffer from which to parse.
      offset - The offset into the buffer from which to parse.
      length - The number of header bytes to parse.
      Returns:
      The long value of the octal bytes.

    • getCheckSumOctalBytes

      public static int getCheckSumOctalBytes(long value, byte[] buf, int offset, int length)
      Parse the checksum octal integer from a header buffer.
      Parameters:
      value - The header value
      buf - The buffer from which to parse.
      offset - The offset into the buffer from which to parse.
      length - The number of header bytes to parse.
      Returns:
      The integer value of the entry's checksum.

    • computeCheckSum

      public static long computeCheckSum(byte[] buf)
      Compute the checksum of a tar entry header.
      Parameters:
      buf - The tar entry's header buffer.
      Returns:
      The computed checksum.