org.geotools.data.shapefile.indexed
Class IndexedFidWriter

java.lang.Object
  org.geotools.data.shapefile.indexed.IndexedFidWriter

public class IndexedFidWriter

extends java.lang.Object

The Writer writes out the fid and record number of features to the fid index file.

Author:

Jesse

Field Summary

static int	HEADER_SIZE
static int	RECORD_SIZE

Constructor Summary

IndexedFidWriter(java.nio.channels.FileChannel writeChannel, IndexedFidReader reader2)

Method Summary

void	close()
boolean	hasNext()
boolean	isClosed()
long	next()
void	remove() Increments the fidIndex by 1.
void	write() Writes the current fidIndex.

Methods inherited from class java.lang.Object

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

Field Detail

HEADER_SIZE

public static final int HEADER_SIZE

See Also:

Constant Field Values

RECORD_SIZE

public static final int RECORD_SIZE

See Also:

Constant Field Values

Constructor Detail

IndexedFidWriter

public IndexedFidWriter(java.nio.channels.FileChannel writeChannel,
                        IndexedFidReader reader2)
                 throws java.io.IOException

Method Detail

hasNext

public boolean hasNext()
                throws java.io.IOException

Throws:

java.io.IOException

next

public long next()
          throws java.io.IOException

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Throws:

java.io.IOException

remove

public void remove()
            throws java.io.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:

java.io.IOException

write

public void write()
           throws java.io.IOException

Writes the current fidIndex. Writes to the same place in the file each time. Only next() moves forward in the file.

Throws:

java.io.IOException

See Also:

next(), remove()

isClosed

public boolean isClosed()