Package org.apache.commons.vfs2.filter
Class EmptyFileFilter
- java.lang.Object
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- org.apache.commons.vfs2.filter.EmptyFileFilter
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- All Implemented Interfaces:
java.io.Serializable
,FileFilter
public class EmptyFileFilter extends java.lang.Object implements FileFilter, java.io.Serializable
This filter accepts files or directories that are empty.If the
File
is a directory it checks that it contains no files.Example, showing how to print out a list of the current directory's empty files/directories:
FileSystemManager fsManager = VFS.getManager(); FileObject dir = fsManager.toFileObject(new File(".")); FileObject[] files = dir.findFiles(new FileFilterSelector(EmptyFileFilter.EMPTY)); for (int i = 0; i < files.length; i++) { System.out.println(files[i]); }
Example, showing how to print out a list of the current directory's non-empty files/directories:
FileSystemManager fsManager = VFS.getManager(); FileObject dir = fsManager.toFileObject(new File(".")); FileObject[] files = dir.findFiles(new FileFilterSelector(EmptyFileFilter.NOT_EMPTY)); for (int i = 0; i < files.length; i++) { System.out.println(files[i]); }
- Since:
- 2.4
- See Also:
- "http://commons.apache.org/proper/commons-io/", Serialized Form
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Field Summary
Fields Modifier and Type Field Description static FileFilter
EMPTY
Singleton instance of empty filter.static FileFilter
NOT_EMPTY
Singleton instance of not-empty filter.private static long
serialVersionUID
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Constructor Summary
Constructors Modifier Constructor Description protected
EmptyFileFilter()
Restrictive constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
accept(FileSelectInfo fileSelectInfo)
Checks to see if the file is empty.
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Field Detail
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serialVersionUID
private static final long serialVersionUID
- See Also:
- Constant Field Values
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EMPTY
public static final FileFilter EMPTY
Singleton instance of empty filter.
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NOT_EMPTY
public static final FileFilter NOT_EMPTY
Singleton instance of not-empty filter.
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Method Detail
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accept
public boolean accept(FileSelectInfo fileSelectInfo) throws FileSystemException
Checks to see if the file is empty. A non-existing file is also considered empty.- Specified by:
accept
in interfaceFileFilter
- Parameters:
fileSelectInfo
- the file or directory to check- Returns:
true
if the file or directory is empty, otherwisefalse
.- Throws:
FileSystemException
- Thrown for file system errors.
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