Package org.apache.tools.zip

Class GeneralPurposeBit

java.lang.Object
org.apache.tools.zip.GeneralPurposeBit
All Implemented Interfaces:
Cloneable
public final class GeneralPurposeBit extends Object implements Cloneable
Parser/encoder for the "general purpose bit" field in ZIP's local file and central directory headers.
Since:
Ant 1.9.0

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    UFT8_NAMES_FLAG
    Indicates that filenames are written in utf-8.

  • Constructor Summary

    Constructors
    Constructor
    Description
    GeneralPurposeBit()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    clone()
     
    byte[]
    encode()
    Encodes the set bits in a form suitable for ZIP archives.
    void
    encode(byte[] buf, int offset)
    Encodes the set bits in a form suitable for ZIP archives.
    boolean
    equals(Object o)
     
    int
    hashCode()
     
    static GeneralPurposeBit
    parse(byte[] data, int offset)
    Parses the supported flags from the given archive data.
    void
    useDataDescriptor(boolean b)
    whether the current entry will use the data descriptor to store CRC and size information
    void
    useEncryption(boolean b)
    whether the current entry will be encrypted
    boolean
    usesDataDescriptor()
    whether the current entry uses the data descriptor to store CRC and size information
    boolean
    usesEncryption()
    whether the current entry is encrypted
    boolean
    usesStrongEncryption()
    whether the current entry is encrypted using strong encryption
    void
    useStrongEncryption(boolean b)
    whether the current entry will be encrypted using strong encryption
    boolean
    usesUTF8ForNames()
    whether the current entry uses UTF8 for file name and comment.
    void
    useUTF8ForNames(boolean b)
    whether the current entry will use UTF8 for file name and comment.

    Methods inherited from class java.lang.Object

    finalize, getClass, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • UFT8_NAMES_FLAG

      public static final int UFT8_NAMES_FLAG
      Indicates that filenames are written in utf-8.

      The only reason this is public is that ZipOutputStream.EFS_FLAG was public in several versions of Apache Ant and we needed a substitute for it.

      See Also:

  • Constructor Details

    • GeneralPurposeBit

      public GeneralPurposeBit()

  • Method Details

    • usesUTF8ForNames

      public boolean usesUTF8ForNames()
      whether the current entry uses UTF8 for file name and comment.
      Returns:
      boolean

    • useUTF8ForNames

      public void useUTF8ForNames(boolean b)
      whether the current entry will use UTF8 for file name and comment.
      Parameters:
      b - boolean

    • usesDataDescriptor

      public boolean usesDataDescriptor()
      whether the current entry uses the data descriptor to store CRC and size information
      Returns:
      boolean

    • useDataDescriptor

      public void useDataDescriptor(boolean b)
      whether the current entry will use the data descriptor to store CRC and size information
      Parameters:
      b - boolean

    • usesEncryption

      public boolean usesEncryption()
      whether the current entry is encrypted
      Returns:
      boolean

    • useEncryption

      public void useEncryption(boolean b)
      whether the current entry will be encrypted
      Parameters:
      b - boolean

    • usesStrongEncryption

      public boolean usesStrongEncryption()
      whether the current entry is encrypted using strong encryption
      Returns:
      boolean

    • useStrongEncryption

      public void useStrongEncryption(boolean b)
      whether the current entry will be encrypted using strong encryption
      Parameters:
      b - boolean

    • encode

      public byte[] encode()
      Encodes the set bits in a form suitable for ZIP archives.
      Returns:
      byte[]

    • encode

      public void encode(byte[] buf, int offset)
      Encodes the set bits in a form suitable for ZIP archives.
      Parameters:
      buf - the output buffer
      offset - The offset within the output buffer of the first byte to be written. must be non-negative and no larger than buf.length-2

    • parse

      public static GeneralPurposeBit parse(byte[] data, int offset)
      Parses the supported flags from the given archive data.
      Parameters:
      data - local file header or a central directory entry.
      offset - offset at which the general purpose bit starts
      Returns:
      GeneralPurposeBit

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • clone

      public Object clone()
      Overrides:
      clone in class Object