Package org.springframework.integration.file.filters

Class AbstractFileListFilter<F>

java.lang.Object

org.springframework.integration.file.filters.AbstractFileListFilter<F>

Type Parameters:

F - the target protocol file type.

All Implemented Interfaces:

FileListFilter<F>

Direct Known Subclasses:

AbstractDirectoryAwareFileListFilter, AbstractFileLockerFilter, AcceptAllFileListFilter, AcceptOnceFileListFilter, ExpressionFileListFilter, IgnoreHiddenFileListFilter

public abstract class AbstractFileListFilter<F>
extends Object
implements FileListFilter<F>

A convenience base class for any FileListFilter whose criteria can be evaluated against each File in isolation. If the entire List of files is required for evaluation, implement the FileListFilter interface directly.

Author:

Mark Fisher, Iwein Fuld, Gary Russell

Constructor Summary

Constructors

Constructor	Description
AbstractFileListFilter()

Method Summary

Modifier and Type	Method	Description
abstract boolean	accept(F file)	Subclasses must implement this method.
final List<F>	filterFiles(F[] files)	Filters out files and returns the files that are left in a list, or an empty list when a null is passed in.
boolean	supportsSingleFileFiltering()	Indicates that this filter supports filtering a single file.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.integration.file.filters.FileListFilter

isForRecursion

Constructor Details

AbstractFileListFilter

public AbstractFileListFilter()

Method Details

filterFiles

public final List<F> filterFiles(F[] files)

Description copied from interface: FileListFilter

Filters out files and returns the files that are left in a list, or an empty list when a null is passed in.

Specified by:

filterFiles in interface FileListFilter<F>

Parameters:

files - The files.

Returns:

The filtered files.

supportsSingleFileFiltering

public boolean supportsSingleFileFiltering()

Description copied from interface: FileListFilter

Indicates that this filter supports filtering a single file. Filters that return true must override FileListFilter.accept(Object). Default false.

Specified by:

supportsSingleFileFiltering in interface FileListFilter<F>

Returns:

true to allow external calls to FileListFilter.accept(Object).

See Also:

• FileListFilter.accept(Object)

accept

public abstract boolean accept(F file)

Subclasses must implement this method.

Specified by:

accept in interface FileListFilter<F>

Parameters:

file - The file.

Returns:

true if the file passes the filter.

See Also:

• FileListFilter.supportsSingleFileFiltering()