Package org.apache.cassandra.index.sai.disk.v1.trie

Class TrieTermsDictionaryWriter

java.lang.Object

org.apache.cassandra.index.sai.disk.v1.trie.TrieTermsDictionaryWriter

All Implemented Interfaces:

Closeable, AutoCloseable

@NotThreadSafe
public class TrieTermsDictionaryWriter
extends Object
implements Closeable

Writes terms dictionary to disk in a trie format (see IncrementalTrieWriter).

Allows for variable-length keys. Trie values are 64-bit offsets to the posting file, pointing to the beginning of summary block for that postings list.

Method Summary

Modifier and Type	Method	Description
void	add(ByteComparable term, long postingListOffset)
void	close()
long	complete(org.apache.commons.lang3.mutable.MutableLong footerPointer)	complete trie index and write footer
long	getFilePointer()
long	getStartOffset()

Methods inherited from class java.lang.Object

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

Method Details

add

public void add(ByteComparable term,
 long postingListOffset)
         throws IOException

Throws:

IOException

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

complete

public long complete(org.apache.commons.lang3.mutable.MutableLong footerPointer)
              throws IOException

complete trie index and write footer

Returns:

the position in the file of the root node.

Throws:

IOException

getFilePointer

public long getFilePointer()

Returns:

current file pointer

getStartOffset

public long getStartOffset()

Returns:

file pointer where index structure begins