org.apache.hadoop.tools

Class RegexCopyFilter

java.lang.Object

org.apache.hadoop.tools.CopyFilter

org.apache.hadoop.tools.RegexCopyFilter

public class RegexCopyFilter
extends CopyFilter

A CopyFilter which compares Java Regex Patterns to each Path to determine whether a file should be copied.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RegexCopyFilter(String filtersFilename) Constructor, sets up a File object to read filter patterns from and the List to store the patterns.

Method Summary

Methods

Modifier and Type	Method and Description
void	initialize() Loads a list of filter patterns for use in shouldCopy.
protected void	setFilters(List<Pattern> filtersList) Sets the list of filters to exclude files from copy.
boolean	shouldCopy(org.apache.hadoop.fs.Path path) Predicate to determine if a file can be excluded from copy.

Methods inherited from class org.apache.hadoop.tools.CopyFilter

getCopyFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

RegexCopyFilter

protected RegexCopyFilter(String filtersFilename)

Constructor, sets up a File object to read filter patterns from and the List to store the patterns.

Method Detail

initialize

public void initialize()

Loads a list of filter patterns for use in shouldCopy.

Overrides:

initialize in class CopyFilter

setFilters

protected final void setFilters(List<Pattern> filtersList)

Sets the list of filters to exclude files from copy. Simplifies testing of the filters feature.

Parameters:

filtersList - a list of Patterns to be excluded

shouldCopy

public boolean shouldCopy(org.apache.hadoop.fs.Path path)

Description copied from class: CopyFilter

Predicate to determine if a file can be excluded from copy.

Specified by:

shouldCopy in class CopyFilter

Parameters:

path - a Path to be considered for copying

Returns:

boolean, true to copy, false to exclude