org.apache.commons.io.filefilter

Class NameFileFilter

java.lang.Object

org.apache.commons.io.filefilter.AbstractFileFilter

org.apache.commons.io.filefilter.NameFileFilter

All Implemented Interfaces:

FileFilter, FilenameFilter, Serializable, FileVisitor<Path>, PathFilter, PathVisitor, IOFileFilter

public class NameFileFilter
extends AbstractFileFilter
implements Serializable

Filters file names for a certain name.

For example, to print all files and directories in the current directory whose name is Test:

Using Classic IO

 File dir = new File(".");
 String[] files = dir.list(new NameFileFilter("Test"));
 for (String file : files) {
     System.out.println(file);
 }
 

Using NIO

 final Path dir = Paths.get("");
 final AccumulatorPathVisitor visitor = AccumulatorPathVisitor.withLongCounters(new NameFileFilter("Test"));
 //
 // Walk one dir
 Files.walkFileTree(dir, Collections.emptySet(), 1, visitor);
 System.out.println(visitor.getPathCounters());
 System.out.println(visitor.getFileList());
 //
 visitor.getPathCounters().reset();
 //
 // Walk dir tree
 Files.walkFileTree(dir, visitor);
 System.out.println(visitor.getPathCounters());
 System.out.println(visitor.getDirList());
 System.out.println(visitor.getFileList());
 

Since:

1.0

See Also:

FileFilterUtils.nameFileFilter(String), FileFilterUtils.nameFileFilter(String, IOCase), Serialized Form

Field Summary

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

EMPTY_STRING_ARRAY

Constructor Summary

Constructors

Constructor and Description
NameFileFilter(List<String> names) Constructs a new case-sensitive name file filter for a list of names.
NameFileFilter(List<String> names, IOCase caseSensitivity) Constructs a new name file filter for a list of names specifying case-sensitivity.
NameFileFilter(String... names) Constructs a new case-sensitive name file filter for an array of names.
NameFileFilter(String name) Constructs a new case-sensitive name file filter for a single name.
NameFileFilter(String[] names, IOCase caseSensitivity) Constructs a new name file filter for an array of names specifying case-sensitivity.
NameFileFilter(String name, IOCase caseSensitivity) Construct a new name file filter specifying case-sensitivity.

Method Summary

Modifier and Type	Method and Description
boolean	accept(File file) Checks to see if the file name matches.
boolean	accept(File dir, String name) Checks to see if the file name matches.
FileVisitResult	accept(Path file, BasicFileAttributes attributes) Checks to see if the file name matches.
String	toString() Provide a String representation of this file filter.

Methods inherited from class org.apache.commons.io.filefilter.AbstractFileFilter

handle, postVisitDirectory, preVisitDirectory, visitFile, visitFileFailed

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

and, negate, or

Constructor Detail

NameFileFilter

public NameFileFilter(List<String> names)

Constructs a new case-sensitive name file filter for a list of names.

Parameters:

names - the names to allow, must not be null

Throws:

IllegalArgumentException - if the name list is null

ClassCastException - if the list does not contain Strings

NameFileFilter

public NameFileFilter(List<String> names,
                      IOCase caseSensitivity)

Constructs a new name file filter for a list of names specifying case-sensitivity.

Parameters:

names - the names to allow, must not be null

caseSensitivity - how to handle case sensitivity, null means case-sensitive

Throws:

IllegalArgumentException - if the name list is null

ClassCastException - if the list does not contain Strings

NameFileFilter

public NameFileFilter(String name)

Constructs a new case-sensitive name file filter for a single name.

Parameters:

name - the name to allow, must not be null

Throws:

IllegalArgumentException - if the name is null

NameFileFilter

public NameFileFilter(String... names)

Constructs a new case-sensitive name file filter for an array of names.

The array is not cloned, so could be changed after constructing the instance. This would be inadvisable however.

Parameters:

names - the names to allow, must not be null

Throws:

IllegalArgumentException - if the names array is null

NameFileFilter

public NameFileFilter(String name,
                      IOCase caseSensitivity)

Construct a new name file filter specifying case-sensitivity.

Parameters:

name - the name to allow, must not be null

caseSensitivity - how to handle case sensitivity, null means case-sensitive

Throws:

IllegalArgumentException - if the name is null

NameFileFilter

public NameFileFilter(String[] names,
                      IOCase caseSensitivity)

Constructs a new name file filter for an array of names specifying case-sensitivity.

Parameters:

names - the names to allow, must not be null

caseSensitivity - how to handle case sensitivity, null means case-sensitive

Throws:

IllegalArgumentException - if the names array is null

Method Detail

accept

public boolean accept(File file)

Checks to see if the file name matches.

Specified by:

accept in interface FileFilter

Specified by:

accept in interface IOFileFilter

Overrides:

accept in class AbstractFileFilter

Parameters:

file - the File to check

Returns:

true if the file name matches

accept

public boolean accept(File dir,
                      String name)

Checks to see if the file name matches.

Specified by:

accept in interface FilenameFilter

Specified by:

accept in interface IOFileFilter

Overrides:

accept in class AbstractFileFilter

Parameters:

dir - the File directory (ignored)

name - the file name

Returns:

true if the file name matches

accept

public FileVisitResult accept(Path file,
                              BasicFileAttributes attributes)

Checks to see if the file name matches.

Specified by:

accept in interface PathFilter

Specified by:

accept in interface IOFileFilter

Parameters:

file - the File to check

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

Returns:

true if the file name matches

Since:

2.9.0

toString

public String toString()

Provide a String representation of this file filter.

Overrides:

toString in class AbstractFileFilter

Returns:

a String representation