org.apache.nutch.tools
Class PruneIndexTool.PrintFieldsChecker

java.lang.Object
  org.apache.nutch.tools.PruneIndexTool.PrintFieldsChecker

All Implemented Interfaces:

PruneIndexTool.PruneChecker

Enclosing class:

PruneIndexTool

public static class PruneIndexTool.PrintFieldsChecker
extends Object
implements PruneIndexTool.PruneChecker

This checker's main function is just to print out selected field values from each document, just before they are deleted.

Author:

Andrzej Bialecki <ab@getopt.org>

Constructor Summary

PruneIndexTool.PrintFieldsChecker(PrintStream ps, String[] fields)

Method Summary

void	close() Close the checker - this could involve flushing output files or somesuch.
boolean	isPrunable(Query q, IndexReader reader, int docNum) Check whether this document should be pruned.

Methods inherited from class java.lang.Object

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

Constructor Detail

PruneIndexTool.PrintFieldsChecker

public PruneIndexTool.PrintFieldsChecker(PrintStream ps,
                                         String[] fields)

Parameters:

ps - an instance of PrintStream to print the information to

fields - a list of Lucene index field names. Values from these fields will be printed for every matching document.

Method Detail

close

public void close()

Description copied from interface: PruneIndexTool.PruneChecker

Close the checker - this could involve flushing output files or somesuch.

Specified by:

close in interface PruneIndexTool.PruneChecker

isPrunable

public boolean isPrunable(Query q,
                          IndexReader reader,
                          int docNum)
                   throws Exception

Description copied from interface: PruneIndexTool.PruneChecker

Check whether this document should be pruned. NOTE: this method MUST NOT modify the IndexReader.

Specified by:

isPrunable in interface PruneIndexTool.PruneChecker

reader - index reader to read documents from

docNum - document ID

Returns:

true if the document should be deleted, false otherwise.

Throws:

Exception