Package org.apache.hadoop.fs

Class GlobExpander

java.lang.Object

org.apache.hadoop.fs.GlobExpander

@Private
@Unstable
public class GlobExpander
extends Object

Constructor Summary

Constructors

Constructor	Description
GlobExpander()

Method Summary

Modifier and Type	Method	Description
static List<String>	expand(String filePattern)	Expand globs in the given filePattern into a collection of file patterns so that in the expanded set no file pattern has a slash character ("/") in a curly bracket pair.

Methods inherited from class java.lang.Object

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

Constructor Details

GlobExpander

public GlobExpander()

Method Details

expand

public static List<String> expand(String filePattern)
                           throws IOException

Expand globs in the given filePattern into a collection of file patterns so that in the expanded set no file pattern has a slash character ("/") in a curly bracket pair.

Some examples of how the filePattern is expanded:

 
 filePattern         - Expanded file pattern 
 {a/b}               - a/b
 /}{a/b}             - /}a/b
 p{a/b,c/d}s         - pa/bs, pc/ds
 {a/b,c/d,{e,f}}     - a/b, c/d, {e,f}
 {a/b,c/d}{e,f}      - a/b{e,f}, c/d{e,f}
 {a,b}/{b,{c/d,e/f}} - {a,b}/b, {a,b}/c/d, {a,b}/e/f
 {a,b}/{c/\d}        - {a,b}/c/d
 

Parameters:

filePattern - file pattern.

Returns:

expanded file patterns

Throws:

IOException - raised on errors performing I/O.