# UnparseableExtraFieldData (Apache Commons Compress 1.13 API)

org.apache.commons.compress.archivers.zip

## Class UnparseableExtraFieldData

- java.lang.Object
- - org.apache.commons.compress.archivers.zip.UnparseableExtraFieldData

- All Implemented Interfaces:
    ZipExtraField

      public final class UnparseableExtraFieldData
      extends Object
      implements ZipExtraField

  Wrapper for extra field data that doesn't conform to the recommended format of header-tag + size + data.

  The header-id is artificial (and not listed as a known ID in APPNOTE.TXT). Since it isn't used anywhere except to satisfy the ZipExtraField contract it shouldn't matter anyway.

  Since:
    1.1
  This class is not thread-safe

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `UnparseableExtraFieldData()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `byte[]` | `getCentralDirectoryData()` The actual data to put into central directory.
    `ZipShort` | `getCentralDirectoryLength()` Length of the complete extra field in the central directory.
    `ZipShort` | `getHeaderId()` The Header-ID.
    `byte[]` | `getLocalFileDataData()` The actual data to put into local file data.
    `ZipShort` | `getLocalFileDataLength()` Length of the complete extra field in the local file data.
    `void` | `parseFromCentralDirectoryData(byte[] buffer, int offset, int length)` Populate data from this array as if it was in central directory data.
    `void` | `parseFromLocalFileData(byte[] buffer, int offset, int length)` Populate data from this array as if it was in local file data.

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### UnparseableExtraFieldData

          public UnparseableExtraFieldData()

  - ### Method Detail

    - #### getHeaderId

          public ZipShort getHeaderId()

      The Header-ID.
      Specified by:
        `getHeaderId` in interface `ZipExtraField`
      Returns:
        a completely arbitrary value that should be ignored.

    - #### getLocalFileDataLength

          public ZipShort getLocalFileDataLength()

      Length of the complete extra field in the local file data.
      Specified by:
        `getLocalFileDataLength` in interface `ZipExtraField`
      Returns:
        The LocalFileDataLength value

    - #### getCentralDirectoryLength

          public ZipShort getCentralDirectoryLength()

      Length of the complete extra field in the central directory.
      Specified by:
        `getCentralDirectoryLength` in interface `ZipExtraField`
      Returns:
        The CentralDirectoryLength value

    - #### getLocalFileDataData

          public byte[] getLocalFileDataData()

      The actual data to put into local file data.
      Specified by:
        `getLocalFileDataData` in interface `ZipExtraField`
      Returns:
        The LocalFileDataData value

    - #### getCentralDirectoryData

          public byte[] getCentralDirectoryData()

      The actual data to put into central directory.
      Specified by:
        `getCentralDirectoryData` in interface `ZipExtraField`
      Returns:
        The CentralDirectoryData value

    - #### parseFromLocalFileData

          public void parseFromLocalFileData(byte[] buffer,
                                    int offset,
                                    int length)

      Populate data from this array as if it was in local file data.
      Specified by:
        `parseFromLocalFileData` in interface `ZipExtraField`
      Parameters:
        `buffer` - the buffer to read data from
        `offset` - offset into buffer to read data
        `length` - the length of data

    - #### parseFromCentralDirectoryData

          public void parseFromCentralDirectoryData(byte[] buffer,
                                           int offset,
                                           int length)

      Populate data from this array as if it was in central directory data.
      Specified by:
        `parseFromCentralDirectoryData` in interface `ZipExtraField`
      Parameters:
        `buffer` - the buffer to read data from
        `offset` - offset into buffer to read data
        `length` - the length of data

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