Package org.apache.commons.io.filefilter

Class TrueFileFilter

java.lang.Object

org.apache.commons.io.filefilter.TrueFileFilter

All Implemented Interfaces:

FileFilter, FilenameFilter, Serializable, PathMatcher, PathFilter, IOFileFilter

public class TrueFileFilter
extends Object
implements IOFileFilter, Serializable

A file filter that always returns true.

Deprecating Serialization

Serialization is deprecated and will be removed in 3.0.

Since:

1.0

See Also:

• FileFilterUtils.trueFileFilter()
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final IOFileFilter	INSTANCE	Singleton instance of true filter.
static final IOFileFilter	TRUE	Singleton instance of true filter.

Fields inherited from interface org.apache.commons.io.filefilter.IOFileFilter

EMPTY_STRING_ARRAY

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	TrueFileFilter()	Restrictive constructor.

Method Summary

Modifier and Type	Method	Description
boolean	accept(File file)	Returns true.
boolean	accept(File dir, String name)	Returns true.
FileVisitResult	accept(Path file, BasicFileAttributes attributes)	Returns true.
IOFileFilter	and(IOFileFilter fileFilter)	Constructs a new "and" filter with this filter.
IOFileFilter	negate()	Constructs a new "not" filter with this filter.
IOFileFilter	or(IOFileFilter fileFilter)	Constructs a new "or" filter with this filter.
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.io.filefilter.IOFileFilter

matches

Field Details

TRUE

public static final IOFileFilter TRUE

Singleton instance of true filter.

Since:

1.3

INSTANCE

public static final IOFileFilter INSTANCE

Singleton instance of true filter. Please use the identical TrueFileFilter.TRUE constant. The new name is more JDK 1.5 friendly as it doesn't clash with other values when using static imports.

Constructor Details

TrueFileFilter

protected TrueFileFilter()

Restrictive constructor.

Method Details

accept

public boolean accept(File file)

Returns true.

Specified by:

accept in interface FileFilter

Specified by:

accept in interface IOFileFilter

Parameters:

file - the file to check (ignored)

Returns:

true

accept

public boolean accept(File dir,
 String name)

Returns true.

Specified by:

accept in interface FilenameFilter

Specified by:

accept in interface IOFileFilter

Parameters:

dir - the directory to check (ignored)

name - the file name (ignored)

Returns:

true

accept

public FileVisitResult accept(Path file,
 BasicFileAttributes attributes)

Returns true.

Specified by:

accept in interface IOFileFilter

Specified by:

accept in interface PathFilter

Parameters:

file - the file to check (ignored)

attributes - the file's basic attributes (TODO may be null).

Returns:

true

Since:

2.9.0

and

public IOFileFilter and(IOFileFilter fileFilter)

Description copied from interface: IOFileFilter

Constructs a new "and" filter with this filter.

Specified by:

and in interface IOFileFilter

Parameters:

fileFilter - the filter to "and".

Returns:

a new filter.

negate

public IOFileFilter negate()

Description copied from interface: IOFileFilter

Constructs a new "not" filter with this filter.

Specified by:

negate in interface IOFileFilter

Returns:

a new filter.

or

public IOFileFilter or(IOFileFilter fileFilter)

Description copied from interface: IOFileFilter

Constructs a new "or" filter with this filter.

Specified by:

or in interface IOFileFilter

Parameters:

fileFilter - the filter to "or".

Returns:

a new filter.

toString

public String toString()

Overrides:

toString in class Object