Class IndexedFidWriter

Object
IndexedFidWriter
All Implemented Interfaces:
AutoCloseable, FileReader, FileWriter

public class IndexedFidWriter extends Object implements FileWriter, AutoCloseable
The Writer writes out the fid and record number of features to the fid index file.
Author:
Jesse
  • Field Details

  • Constructor Details

  • Method Details

    • hasNext

      public boolean hasNext() throws IOException
      Throws:
      IOException
    • next

      public long next() throws IOException
      Throws:
      IOException
    • close

      public void close() throws IOException
      Specified by:
      close in interface AutoCloseable
      Throws:
      IOException
    • remove

      public void remove() throws IOException
      Increments the fidIndex by 1.

      Indicates that a feature was removed from the location. This is intended to ensure that FIDs stay constant over time. Consider the following case of 5 features.

      • feature 1 has fid typename.0
      • feature 2 has fid typename.1
      • feature 3 has fid typename.2
      • feature 4 has fid typename.3
      • feature 5 has fid typename.4

      when feature 3 is removed/deleted the following usage of the write should take place:

      • next(); (move to feature 1)
      • next(); (move to feature 2)
      • next(); (move to feature 3)
      • remove();(delete feature 3)
      • next(); (move to feature 4)
      • // optional write(); (write feature 4)
      • next(); (move to feature 5)
      • write(); (write(feature 5)
      Throws:
      IOException - if current fid index is null
    • write

      public void write() throws IOException
      Writes the current fidIndex. Writes to the same place in the file each time. Only next() moves forward in the file.
      Throws:
      IOException
      See Also:
    • isClosed

      public boolean isClosed()
    • id

      public String id()
      Description copied from interface: FileWriter
      An id for the writer. This is only used for debugging.
      Specified by:
      id in interface FileReader
      Specified by:
      id in interface FileWriter
      Returns:
      id for the writer.