Package org.marketcetera.util.file

Class SmartLinksDirectoryWalker

java.lang.Object

org.apache.commons.io.DirectoryWalker<String>

org.marketcetera.util.file.SmartLinksDirectoryWalker

Direct Known Subclasses:

Deleter.RecursiveDeleter

public abstract class SmartLinksDirectoryWalker
extends org.apache.commons.io.DirectoryWalker<String>

A DirectoryWalker which provides convenience methods to initiate traversal, and (optionally) does not follow symbolic links.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.commons.io.DirectoryWalker

org.apache.commons.io.DirectoryWalker.CancelException

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	mFollowLinks

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SmartLinksDirectoryWalker(boolean followLinks)	Constructor mirroring superclass constructor.
protected	SmartLinksDirectoryWalker(boolean followLinks, FileFilter filter, int depthLimit)	Constructor mirroring superclass constructor.
protected	SmartLinksDirectoryWalker(boolean followLinks, org.apache.commons.io.filefilter.IOFileFilter directoryFilter, org.apache.commons.io.filefilter.IOFileFilter fileFilter, int depthLimit)	Constructor mirroring superclass constructor.

Method Summary

Modifier and Type	Method	Description
void	apply(File root)	Traverses the file tree rooted at the given root.
void	apply(File root, Collection<String> results)	Traverses the file tree rooted at the given root.
void	apply(String name)	Traverses the file tree rooted at the file with the given name.
void	apply(String name, Collection<String> results)	Traverses the file tree rooted at the file with the given name.
boolean	getFollowLinks()	Returns true if symbolic links to directories should be followed during traversal.
protected boolean	handleDirectory(File directory, int depth, Collection<String> results)	Returns false if the given directory is a symbolic link to a directory, and links are not to be followed, thereby blocking following the link during traversal.

Methods inherited from class org.apache.commons.io.DirectoryWalker

checkIfCancelled, filterDirectoryContents, handleCancelled, handleDirectoryEnd, handleDirectoryStart, handleEnd, handleFile, handleIsCancelled, handleRestricted, handleStart, walk

Methods inherited from class java.lang.Object

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

Field Detail

mFollowLinks

private boolean mFollowLinks

Constructor Detail

SmartLinksDirectoryWalker

protected SmartLinksDirectoryWalker(boolean followLinks)

Constructor mirroring superclass constructor.

Parameters:

followLinks - True if links should be followed.

See Also:

DirectoryWalker()

SmartLinksDirectoryWalker

protected SmartLinksDirectoryWalker(boolean followLinks,
                                    FileFilter filter,
                                    int depthLimit)

Constructor mirroring superclass constructor.

Parameters:

followLinks - True if links should be followed.

filter - The filter to apply. It may be null, meaning visit all files.

depthLimit - Controls to what depth the hierarchy is navigated. Less than 0 means unlimited.

See Also:

DirectoryWalker(FileFilter,int)

SmartLinksDirectoryWalker

protected SmartLinksDirectoryWalker(boolean followLinks,
                                    org.apache.commons.io.filefilter.IOFileFilter directoryFilter,
                                    org.apache.commons.io.filefilter.IOFileFilter fileFilter,
                                    int depthLimit)

Constructor mirroring superclass constructor.

Parameters:

followLinks - True if links should be followed.

directoryFilter - The filter to apply to directories. It may be null, meaning visit all directories.

fileFilter - The filter to apply to files. It may be null, meaning visit all directories.

depthLimit - Controls to what depth the hierarchy is navigated. Less than 0 means unlimited.

See Also:

DirectoryWalker(IOFileFilter,IOFileFilter,int)

Method Detail

handleDirectory

protected boolean handleDirectory(File directory,
                                  int depth,
                                  Collection<String> results)
                           throws IOException

Returns false if the given directory is a symbolic link to a directory, and links are not to be followed, thereby blocking following the link during traversal. In this case, it also invokes DirectoryWalker.handleFile(File,int,Collection) on the link.

Overrides:

handleDirectory in class org.apache.commons.io.DirectoryWalker<String>

Throws:

IOException

See Also:

DirectoryWalker.handleDirectory(File,int,Collection)

getFollowLinks

public boolean getFollowLinks()

Returns true if symbolic links to directories should be followed during traversal.

Returns:

True if so.

apply

public void apply(File root,
                  Collection<String> results)
           throws IOException

Traverses the file tree rooted at the given root. The root may be nonexistent (no-op) or a plain file (which becomes the only file visited).

Parameters:

root - The root.

results - An object passed intact into DirectoryWalker callbacks.

Throws:

IOException - Thrown if an I/O error occurs.

apply

public void apply(File root)
           throws IOException

Traverses the file tree rooted at the given root. The root may be nonexistent (no-op) or a plain file (which becomes the only file visited). The results argument in all DirectoryWalker callbacks will be null.

Parameters:

root - The root.

Throws:

IOException - Thrown if an I/O error occurs.

apply

public void apply(String name,
                  Collection<String> results)
           throws IOException

Traverses the file tree rooted at the file with the given name. The root may be nonexistent (no-op) or a plain file (which becomes the only file visited).

Parameters:

name - The file name.

results - An object passed intact into DirectoryWalker callbacks.

Throws:

IOException - Thrown if an I/O error occurs.

apply

public void apply(String name)
           throws IOException

Traverses the file tree rooted at the file with the given name. The root may be nonexistent (no-op) or a plain file (which becomes the only file visited). The results argument in all DirectoryWalker callbacks will be null.

Parameters:

name - The file name.

Throws:

IOException - Thrown if an I/O error occurs.