## org.apache.tools.zip
Interface ZipExtraField

All Known Implementing Classes:
  AsiExtraField, UnrecognizedExtraField

public interface ZipExtraField

General format of extra field data.

Extra fields usually appear twice per file, once in the local file data and once in the central directory. Usually they are the same, but they don't have to be. `java.util.zip.ZipOutputStream` will only use the local file data in both places.

Version:
  $Revision: 1.3.2.1 $
Author:
  Stefan Bodewig

Method Summary
`byte[]` `getCentralDirectoryData()` The actual data to put central directory - without Header-ID or length specifier.
`ZipShort` `getCentralDirectoryLength()` Length of the extra field in the central directory - without Header-ID or length specifier.
`ZipShort` `getHeaderId()` The Header-ID.
`byte[]` `getLocalFileDataData()` The actual data to put into local file data - without Header-ID or length specifier.
`ZipShort` `getLocalFileDataLength()` Length of the extra field in the local file data - without Header-ID or length specifier.
`void` `parseFromLocalFileData(byte[] data, int offset, int length)` Populate data from this array as if it was in local file data.

Method Detail

### getHeaderId

    public ZipShort getHeaderId()

  The Header-ID.

  Since:
    1.1

### getLocalFileDataLength

    public ZipShort getLocalFileDataLength()

  Length of the extra field in the local file data - without Header-ID or length specifier.

  Since:
    1.1

### getCentralDirectoryLength

    public ZipShort getCentralDirectoryLength()

  Length of the extra field in the central directory - without Header-ID or length specifier.

  Since:
    1.1

### getLocalFileDataData

    public byte[] getLocalFileDataData()

  The actual data to put into local file data - without Header-ID or length specifier.

  Since:
    1.1

### getCentralDirectoryData

    public byte[] getCentralDirectoryData()

  The actual data to put central directory - without Header-ID or length specifier.

  Since:
    1.1

### parseFromLocalFileData

    public void parseFromLocalFileData(byte[] data,
                                       int offset,
                                       int length)
                                throws java.util.zip.ZipException

  Populate data from this array as if it was in local file data.

  Throws:
    `java.util.zip.ZipException`
  Since:
    1.1

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