Uses of Class
org.apache.nutch.io.WritableComparator

Packages that use WritableComparator

org.apache.nutch.db	Web database: tracks page fetches and link structure.
org.apache.nutch.indexer	Maintain Lucene full-text indexes.
org.apache.nutch.io	Generic i/o code for use when reading and writing data to the network, to databases, and to files.
org.apache.nutch.tools

Uses of WritableComparator in org.apache.nutch.db

Subclasses of WritableComparator in org.apache.nutch.db

static class	DistributedWebDBWriter.LinkInstruction.MD5Comparator Sorts the instruction first by Md5, then by opcode.
static class	DistributedWebDBWriter.LinkInstruction.UrlComparator Sorts the instruction first by url, then by opcode.
static class	DistributedWebDBWriter.PageInstruction.PageComparator Sorts the instruction first by Page, then by opcode.
static class	DistributedWebDBWriter.PageInstruction.UrlComparator Sorts the instruction first by url, then by opcode.
static class	Link.MD5Comparator MD5Comparator is the opposite.
static class	Link.UrlComparator URLComparator uses the standard method where, uh, the URL comes first.
static class	Page.Comparator Compares pages by MD5, then by URL.
static class	Page.UrlComparator Compares pages by URL only.
static class	WebDBWriter.LinkInstruction.MD5Comparator Sorts the instruction first by Md5, then by opcode.
static class	WebDBWriter.LinkInstruction.UrlComparator Sorts the instruction first by url, then by opcode.
static class	WebDBWriter.PageInstruction.PageComparator Sorts the instruction first by Page, then by opcode.
static class	WebDBWriter.PageInstruction.UrlComparator Sorts the instruction first by url, then by opcode.

Constructors in org.apache.nutch.db with parameters of type WritableComparator

DBSectionReader(NutchFileSystem nfs, File sectionFile, WritableComparator comparator)
Right now we assume we're getting a File that is a MapFile.Reader directory.

Uses of WritableComparator in org.apache.nutch.indexer

Subclasses of WritableComparator in org.apache.nutch.indexer

static class	DeleteDuplicates.IndexedDoc.ByHashDoc Order equal hashes by decreasing index and document.
static class	DeleteDuplicates.IndexedDoc.ByHashScore Order equal hashes by decreasing score and increasing urlLen.

Uses of WritableComparator in org.apache.nutch.io

Subclasses of WritableComparator in org.apache.nutch.io

static class	BooleanWritable.Comparator A Comparator optimized for BooleanWritable.
static class	FloatWritable.Comparator A Comparator optimized for FloatWritable.
static class	IntWritable.Comparator A Comparator optimized for IntWritable.
static class	LongWritable.Comparator A Comparator optimized for LongWritable.
static class	LongWritable.DecreasingComparator A decreasing Comparator optimized for LongWritable.
static class	MD5Hash.Comparator A WritableComparator optimized for MD5Hash keys.
static class	UTF8.Comparator A WritableComparator optimized for UTF8 keys.

Methods in org.apache.nutch.io that return WritableComparator

static WritableComparator

WritableComparator.get(Class c) Get a comparator for a WritableComparable implementation.

Methods in org.apache.nutch.io with parameters of type WritableComparator

static void

WritableComparator.define(Class c, WritableComparator comparator) Register an optimized comparator for a WritableComparable implementation.

Constructors in org.apache.nutch.io with parameters of type WritableComparator

MapFile.Writer(NutchFileSystem nfs, String dirName, WritableComparator comparator, Class valClass)
Create the named map using the named key comparator.

MapFile.Reader(NutchFileSystem nfs, String dirName, WritableComparator comparator)
Construct a map reader for the named map using the named comparator.

SetFile.Writer(NutchFileSystem nfs, String dirName, WritableComparator comparator)
Create the named set using the named key comparator.

SequenceFile.Sorter(NutchFileSystem nfs, WritableComparator comparator, Class valClass)
Sort and merge using an arbitrary WritableComparator.

SetFile.Reader(NutchFileSystem nfs, String dirName, WritableComparator comparator)
Construct a set reader for the named set using the named comparator.

Uses of WritableComparator in org.apache.nutch.tools

Subclasses of WritableComparator in org.apache.nutch.tools

static class	UpdateSegmentsFromDb.BySegmentComparator Used internally only.
static class	UpdateSegmentsFromDb.ByUrlComparator Used internally only.