Package org.apache.commons.vfs2.filter
Class EmptyFileFilter
java.lang.Object
org.apache.commons.vfs2.filter.EmptyFileFilter
- All Implemented Interfaces:
Serializable,FileFilter
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
- Author:
- This code was originally ported from Apache Commons IO File Filter
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final FileFilterSingleton instance of empty filter.static final FileFilterSingleton instance of not-empty filter. -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionbooleanaccept(FileSelectInfo fileSelectInfo) Checks to see if the file is empty.
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Field Details
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EMPTY
Singleton instance of empty filter. -
NOT_EMPTY
Singleton instance of not-empty filter.
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Constructor Details
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EmptyFileFilter
protected EmptyFileFilter()Restrictive constructor.
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Method Details
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accept
Checks to see if the file is empty. A non-existing file is also considered empty.- Specified by:
acceptin interfaceFileFilter- Parameters:
fileSelectInfo- the file or directory to check- Returns:
trueif the file or directory is empty, otherwisefalse.- Throws:
FileSystemException- Thrown for file system errors.
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