org.springframework.integration.file.remote.gateway

Class AbstractRemoteFileOutboundGateway<F>

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.handler.MessageHandlerSupport

org.springframework.integration.handler.AbstractMessageHandler

org.springframework.integration.handler.AbstractMessageProducingHandler

org.springframework.integration.handler.AbstractReplyProducingMessageHandler

org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway<F>

All Implemented Interfaces:

org.reactivestreams.Subscriber<Message<?>>, Aware, BeanClassLoaderAware, BeanFactoryAware, BeanNameAware, DisposableBean, InitializingBean, ApplicationContextAware, Ordered, ExpressionCapable, Orderable, MessageProducer, HeaderPropagationAware, IntegrationPattern, NamedComponent, IntegrationManagement, TrackableComponent, MessageHandler, reactor.core.CoreSubscriber<Message<?>>

Direct Known Subclasses:

FtpOutboundGateway, SftpOutboundGateway

public abstract class AbstractRemoteFileOutboundGateway<F>
extends AbstractReplyProducingMessageHandler

Base class for Outbound Gateways that perform remote file operations.

Since:

2.1

Author:

Gary Russell, Artem Bilan

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AbstractRemoteFileOutboundGateway.Command Enumeration of commands supported by the gateways.
static class	AbstractRemoteFileOutboundGateway.Option Enumeration of options supported by various commands.

Nested classes/interfaces inherited from class org.springframework.integration.handler.AbstractReplyProducingMessageHandler

AbstractReplyProducingMessageHandler.RequestHandler

Nested classes/interfaces inherited from interface org.springframework.integration.support.management.IntegrationManagement

IntegrationManagement.ManagementOverrides

Field Summary

Fields inherited from class org.springframework.integration.handler.AbstractMessageProducingHandler

messagingTemplate

Fields inherited from class org.springframework.integration.context.IntegrationObjectSupport

EXPRESSION_PARSER, logger

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Fields inherited from interface org.springframework.integration.support.management.IntegrationManagement

METER_PREFIX, RECEIVE_COUNTER_NAME, SEND_TIMER_NAME

Constructor Summary

Constructors

Constructor and Description
AbstractRemoteFileOutboundGateway(RemoteFileTemplate<F> remoteFileTemplate, AbstractRemoteFileOutboundGateway.Command command, String expressionArg) Construct an instance with the supplied remote file template, a command ('ls', 'get' etc), and an expression to determine the filename.
AbstractRemoteFileOutboundGateway(RemoteFileTemplate<F> remoteFileTemplate, MessageSessionCallback<F,?> messageSessionCallback) Construct an instance with the supplied remote file template and callback for performing operations on the session.
AbstractRemoteFileOutboundGateway(RemoteFileTemplate<F> remoteFileTemplate, String command, String expression) Construct an instance with the supplied remote file template, a command ('ls', 'get' etc), and an expression to determine the filename.
AbstractRemoteFileOutboundGateway(SessionFactory<F> sessionFactory, AbstractRemoteFileOutboundGateway.Command command, String expression) Construct an instance with the supplied session factory, a command ('ls', 'get' etc), and an expression to determine the filename.
AbstractRemoteFileOutboundGateway(SessionFactory<F> sessionFactory, MessageSessionCallback<F,?> messageSessionCallback) Construct an instance using the provided session factory and callback for performing operations on the session.
AbstractRemoteFileOutboundGateway(SessionFactory<F> sessionFactory, String command, String expression) Construct an instance with the supplied session factory, a command ('ls', 'get' etc), and an expression to determine the filename.

Method Summary

Modifier and Type	Method and Description
protected abstract List<AbstractFileInfo<F>>	asFileInfoList(Collection<F> files)
protected void	assertRemoteFileTemplateMutability(String propertyName)
protected void	doChmod(RemoteFileOperations<F> remoteFileOperations, String path, int chmodToSet) Set the mode on the remote file after transfer; the default implementation does nothing.
protected void	doInit()
protected abstract F	enhanceNameWithSubDirectory(F file, String directory)
protected List<F>	filterFiles(F[] files)
protected List<File>	filterMputFiles(File[] files)
protected File	get(Message<?> message, Session<F> session, String remoteDir, String remoteFilePath, String remoteFilename, F fileInfoParam) Copy a remote file to the configured local directory.
protected abstract String	getFilename(AbstractFileInfo<F> file)
protected abstract String	getFilename(F file)
protected abstract long	getModified(F file)
protected String	getRemoteFilename(String remoteFilePath)
protected RemoteFileTemplate<F>	getRemoteFileTemplate()
protected Object	handleRequestMessage(Message<?> requestMessage) Subclasses must implement this method to handle the request Message.
boolean	isChmodCapable()
protected abstract boolean	isDirectory(F file)
protected abstract boolean	isLink(F file)
protected List<?>	ls(Message<?> message, Session<F> session, String dir) List remote files to local representation.
protected List<File>	mGet(Message<?> message, Session<F> session, String remoteDirectory, String remoteFilename)
protected List<String>	mPut(Message<?> message, Session<F> session, File localDir) Put files from the provided directory to the remote server recursively.
protected boolean	mv(Message<?> message, Session<F> session, String remoteFilePath, String remoteFileNewPath) Move one remote path to another.
protected List<String>	nlst(Message<?> message, Session<F> session, String dir) List remote files names for the provided directory.
protected void	purgeDots(List<F> lsFiles)
protected void	purgeLinks(List<F> lsFiles)
protected String	put(Message<?> message, Session<F> session, String subDirectory) Put the file based on the message to the remote server.
protected void	remoteFileTemplateExplicitlySet(boolean remoteFileTemplateExplicitlySet)
protected boolean	rm(Message<?> message, Session<F> session, String remoteFilePath) Perform remote delete for the provided path.
void	setAutoCreateDirectory(boolean autoCreateDirectory) Determine whether the remote directory should automatically be created when sending files to the remote system.
void	setAutoCreateLocalDirectory(boolean autoCreateLocalDirectory) A boolean flag to identify if local directory should be created automatically.
void	setCharset(String charset) Set the charset to use when converting String payloads to bytes as the content of the remote file.
void	setChmod(int chmod) Set the file permissions after uploading, e.g.
void	setChmodOctal(String chmod) String setter for Spring XML convenience.
void	setFileExistsMode(FileExistsMode fileExistsMode) Determine the action to take when using GET and MGET operations when the file already exists locally, or PUT and MPUT when the file exists on the remote system.
void	setFileNameExpression(Expression fileNameExpression) Set the file name expression to determine the full path to the remote file.
void	setFileNameGenerator(FileNameGenerator fileNameGenerator) Set the file name generator used to generate the remote filename to be used when transferring files to the remote system.
void	setFilter(FileListFilter<F> filter) Set a FileListFilter to filter remote files.
void	setLocalDirectory(File localDirectory) Specify a directory path where remote files will be transferred to.
void	setLocalDirectoryExpression(Expression localDirectoryExpression) Specify a SpEL expression to evaluate the directory path to which remote files will be transferred.
void	setLocalDirectoryExpressionString(String localDirectoryExpression) Specify a SpEL expression to evaluate the directory path to which remote files will be transferred.
void	setLocalFilenameGeneratorExpression(Expression localFilenameGeneratorExpression) Specify a SpEL expression for local files renaming after downloading.
void	setLocalFilenameGeneratorExpressionString(String localFilenameGeneratorExpression) Specify a SpEL expression for local files renaming after downloading.
void	setMputFilter(FileListFilter<File> filter) A FileListFilter that runs against the local file system view when using MPUT command.
void	setOption(AbstractRemoteFileOutboundGateway.Option... options) Specify the array of options for various gateway commands.
void	setOptions(String options) Specify the options for various gateway commands as a space-delimited string.
void	setRemoteDirectoryExpression(Expression remoteDirectoryExpression) Set the remote directory expression used to determine the remote directory to which files will be sent.
void	setRemoteFileSeparator(String remoteFileSeparator) Set the file separator when dealing with remote files; default '/'.
void	setRenameExpression(Expression renameExpression) Specify a SpEL expression for files renaming during transfer.
void	setRenameExpressionString(String renameExpression) Specify a SpEL expression for files renaming during transfer.
void	setTemporaryFileSuffix(String temporaryFileSuffix) Set the temporary suffix to use when transferring files to the remote system.
void	setTemporaryRemoteDirectoryExpression(Expression temporaryRemoteDirectoryExpression) Set a temporary remote directory expression; used when transferring files to the remote system.
void	setUseTemporaryFileName(boolean useTemporaryFileName) Set whether a temporary file name is used when sending files to the remote system.

Methods inherited from class org.springframework.integration.handler.AbstractReplyProducingMessageHandler

doInvokeAdvisedRequestHandler, getBeanClassLoader, getIntegrationPatternType, getRequiresReply, handleMessageInternal, hasAdviceChain, onInit, setAdviceChain, setBeanClassLoader, setRequiresReply

Methods inherited from class org.springframework.integration.handler.AbstractMessageProducingHandler

addNotPropagatedHeaders, createOutputMessage, getNotPropagatedHeaders, getOutputChannel, isAsync, messageBuilderForReply, produceOutput, resolveErrorChannel, sendErrorMessage, sendOutput, sendOutputs, setAsync, setNotPropagatedHeaders, setOutputChannel, setOutputChannelName, setSendTimeout, shouldCopyRequestHeaders, shouldSplitOutput, updateNotPropagatedHeaders

Methods inherited from class org.springframework.integration.handler.AbstractMessageHandler

handleMessage, onComplete, onError, onNext, onSubscribe

Methods inherited from class org.springframework.integration.handler.MessageHandlerSupport

buildSendTimer, destroy, getComponentType, getManagedName, getManagedType, getMetricsCaptor, getOrder, getOverrides, isLoggingEnabled, registerMetricsCaptor, sendTimer, setLoggingEnabled, setManagedName, setManagedType, setOrder, setShouldTrack, shouldTrack

Methods inherited from class org.springframework.integration.context.IntegrationObjectSupport

afterPropertiesSet, extractTypeIfPossible, generateId, getApplicationContext, getApplicationContextId, getBeanDescription, getBeanFactory, getBeanName, getChannelResolver, getComponentName, getConversionService, getExpression, getIntegrationProperties, getIntegrationProperty, getMessageBuilderFactory, getTaskScheduler, isInitialized, setApplicationContext, setBeanFactory, setBeanName, setChannelResolver, setComponentName, setConversionService, setMessageBuilderFactory, setPrimaryExpression, setTaskScheduler, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface reactor.core.CoreSubscriber

currentContext

Methods inherited from interface org.springframework.integration.support.management.IntegrationManagement

getThisAs

Methods inherited from interface org.springframework.integration.support.context.NamedComponent

getBeanName, getComponentName

Constructor Detail

AbstractRemoteFileOutboundGateway

public AbstractRemoteFileOutboundGateway(SessionFactory<F> sessionFactory,
                                         MessageSessionCallback<F,?> messageSessionCallback)

Construct an instance using the provided session factory and callback for performing operations on the session.

Parameters:

sessionFactory - the session factory.

messageSessionCallback - the callback.

AbstractRemoteFileOutboundGateway

public AbstractRemoteFileOutboundGateway(RemoteFileTemplate<F> remoteFileTemplate,
                                         MessageSessionCallback<F,?> messageSessionCallback)

Construct an instance with the supplied remote file template and callback for performing operations on the session.

Parameters:

remoteFileTemplate - the remote file template.

messageSessionCallback - the callback.

AbstractRemoteFileOutboundGateway

public AbstractRemoteFileOutboundGateway(SessionFactory<F> sessionFactory,
                                         String command,
                                         @Nullable
                                         String expression)

Construct an instance with the supplied session factory, a command ('ls', 'get' etc), and an expression to determine the filename.

Parameters:

sessionFactory - the session factory.

command - the command.

expression - the filename expression.

AbstractRemoteFileOutboundGateway

public AbstractRemoteFileOutboundGateway(SessionFactory<F> sessionFactory,
                                         AbstractRemoteFileOutboundGateway.Command command,
                                         @Nullable
                                         String expression)

Construct an instance with the supplied session factory, a command ('ls', 'get' etc), and an expression to determine the filename.

Parameters:

sessionFactory - the session factory.

command - the command.

expression - the filename expression.

AbstractRemoteFileOutboundGateway

public AbstractRemoteFileOutboundGateway(RemoteFileTemplate<F> remoteFileTemplate,
                                         String command,
                                         @Nullable
                                         String expression)

Construct an instance with the supplied remote file template, a command ('ls', 'get' etc), and an expression to determine the filename.

Parameters:

remoteFileTemplate - the remote file template.

command - the command.

expression - the filename expression.

AbstractRemoteFileOutboundGateway

public AbstractRemoteFileOutboundGateway(RemoteFileTemplate<F> remoteFileTemplate,
                                         AbstractRemoteFileOutboundGateway.Command command,
                                         @Nullable
                                         String expressionArg)

Construct an instance with the supplied remote file template, a command ('ls', 'get' etc), and an expression to determine the filename.

Parameters:

remoteFileTemplate - the remote file template.

command - the command.

expressionArg - the filename expression.

Method Detail

remoteFileTemplateExplicitlySet

protected final void remoteFileTemplateExplicitlySet(boolean remoteFileTemplateExplicitlySet)

assertRemoteFileTemplateMutability

protected void assertRemoteFileTemplateMutability(String propertyName)

setOptions

public void setOptions(String options)

Specify the options for various gateway commands as a space-delimited string.

Parameters:

options - the options to set

See Also:

AbstractRemoteFileOutboundGateway.Option

setOption

public void setOption(AbstractRemoteFileOutboundGateway.Option... options)

Specify the array of options for various gateway commands.

Parameters:

options - the AbstractRemoteFileOutboundGateway.Option array to use.

Since:

5.0

See Also:

AbstractRemoteFileOutboundGateway.Option

setRemoteFileSeparator

public void setRemoteFileSeparator(String remoteFileSeparator)

Set the file separator when dealing with remote files; default '/'.

Parameters:

remoteFileSeparator - the separator.

See Also:

RemoteFileTemplate.setRemoteFileSeparator(String)

setLocalDirectory

public void setLocalDirectory(File localDirectory)

Specify a directory path where remote files will be transferred to.

Parameters:

localDirectory - the localDirectory to set

setLocalDirectoryExpression

public void setLocalDirectoryExpression(Expression localDirectoryExpression)

Specify a SpEL expression to evaluate the directory path to which remote files will be transferred.

Parameters:

localDirectoryExpression - the SpEL to determine the local directory.

setLocalDirectoryExpressionString

public void setLocalDirectoryExpressionString(String localDirectoryExpression)

Specify a SpEL expression to evaluate the directory path to which remote files will be transferred.

Parameters:

localDirectoryExpression - the SpEL to determine the local directory.

Since:

5.0

setAutoCreateLocalDirectory

public void setAutoCreateLocalDirectory(boolean autoCreateLocalDirectory)

A boolean flag to identify if local directory should be created automatically. Defaults to true.

Parameters:

autoCreateLocalDirectory - the autoCreateLocalDirectory to set

setTemporaryFileSuffix

public void setTemporaryFileSuffix(String temporaryFileSuffix)

Set the temporary suffix to use when transferring files to the remote system. Default .writing.

Parameters:

temporaryFileSuffix - the temporaryFileSuffix to set

See Also:

RemoteFileTemplate.setTemporaryFileSuffix(String)

setAutoCreateDirectory

public void setAutoCreateDirectory(boolean autoCreateDirectory)

Determine whether the remote directory should automatically be created when sending files to the remote system.

Parameters:

autoCreateDirectory - true to create the directory.

Since:

5.2

See Also:

RemoteFileTemplate.setAutoCreateDirectory(boolean)

setRemoteDirectoryExpression

public void setRemoteDirectoryExpression(Expression remoteDirectoryExpression)

Set the remote directory expression used to determine the remote directory to which files will be sent.

Parameters:

remoteDirectoryExpression - the remote directory expression.

Since:

5.2

See Also:

RemoteFileTemplate.setRemoteDirectoryExpression(org.springframework.expression.Expression)

setTemporaryRemoteDirectoryExpression

public void setTemporaryRemoteDirectoryExpression(Expression temporaryRemoteDirectoryExpression)

Set a temporary remote directory expression; used when transferring files to the remote system. After a successful transfer the file is renamed using the remoteDirectoryExpression.

Parameters:

temporaryRemoteDirectoryExpression - the temporary remote directory expression.

Since:

5.2

See Also:

RemoteFileTemplate.setTemporaryRemoteDirectoryExpression(org.springframework.expression.Expression)

setFileNameExpression

public void setFileNameExpression(Expression fileNameExpression)

Set the file name expression to determine the full path to the remote file.

Parameters:

fileNameExpression - the file name expression.

Since:

5.2

See Also:

RemoteFileTemplate.setFileNameExpression(org.springframework.expression.Expression)

setUseTemporaryFileName

public void setUseTemporaryFileName(boolean useTemporaryFileName)

Set whether a temporary file name is used when sending files to the remote system.

Parameters:

useTemporaryFileName - true to use a temporary file name.

Since:

5.2

See Also:

RemoteFileTemplate.setUseTemporaryFileName(boolean)

setFileNameGenerator

public void setFileNameGenerator(FileNameGenerator fileNameGenerator)

Set the file name generator used to generate the remote filename to be used when transferring files to the remote system.

Parameters:

fileNameGenerator - the file name generator.

Since:

5.2

See Also:

RemoteFileTemplate.setFileNameGenerator(org.springframework.integration.file.FileNameGenerator)

setCharset

public void setCharset(String charset)

Set the charset to use when converting String payloads to bytes as the content of the remote file. Default UTF-8.

Parameters:

charset - the charset.

Since:

5.2

See Also:

RemoteFileTemplate.setCharset(java.lang.String)

setFilter

public void setFilter(FileListFilter<F> filter)

Set a FileListFilter to filter remote files.

Parameters:

filter - the filter to set

setMputFilter

public void setMputFilter(FileListFilter<File> filter)

A FileListFilter that runs against the local file system view when using MPUT command.

Parameters:

filter - the filter to set

setRenameExpression

public void setRenameExpression(Expression renameExpression)

Specify a SpEL expression for files renaming during transfer.

Parameters:

renameExpression - the expression to use.

Since:

4.3

setRenameExpressionString

public void setRenameExpressionString(String renameExpression)

Specify a SpEL expression for files renaming during transfer.

Parameters:

renameExpression - the String in SpEL syntax.

Since:

4.3

setLocalFilenameGeneratorExpression

public void setLocalFilenameGeneratorExpression(Expression localFilenameGeneratorExpression)

Specify a SpEL expression for local files renaming after downloading.

Parameters:

localFilenameGeneratorExpression - the expression to use.

Since:

3.0

setLocalFilenameGeneratorExpressionString

public void setLocalFilenameGeneratorExpressionString(String localFilenameGeneratorExpression)

Specify a SpEL expression for local files renaming after downloading.

Parameters:

localFilenameGeneratorExpression - the String in SpEL syntax.

Since:

4.3

setFileExistsMode

public void setFileExistsMode(FileExistsMode fileExistsMode)

Determine the action to take when using GET and MGET operations when the file already exists locally, or PUT and MPUT when the file exists on the remote system.

Parameters:

fileExistsMode - the fileExistsMode to set.

Since:

4.2

setChmodOctal

public void setChmodOctal(String chmod)

String setter for Spring XML convenience.

Parameters:

chmod - permissions as an octal string e.g "600";

Since:

4.3

See Also:

setChmod(int)

setChmod

public void setChmod(int chmod)

Set the file permissions after uploading, e.g. 0600 for owner read/write.

Parameters:

chmod - the permissions.

Since:

4.3

isChmodCapable

public boolean isChmodCapable()

getRemoteFileTemplate

protected final RemoteFileTemplate<F> getRemoteFileTemplate()

doInit

protected void doInit()

Overrides:

doInit in class AbstractReplyProducingMessageHandler

handleRequestMessage

protected Object handleRequestMessage(Message<?> requestMessage)

Description copied from class: AbstractReplyProducingMessageHandler

Subclasses must implement this method to handle the request Message. The return value may be a Message, a MessageBuilder, or any plain Object. The base class will handle the final creation of a reply Message from any of those starting points. If the return value is null, the Message flow will end here.

Specified by:

handleRequestMessage in class AbstractReplyProducingMessageHandler

Parameters:

requestMessage - The request message.

Returns:

The result of handling the message, or null.

nlst

protected List<String> nlst(Message<?> message,
                            Session<F> session,
                            String dir)
                     throws IOException

List remote files names for the provided directory. The message can be consulted for some context related to the current request; isn't used in the default implementation.

Parameters:

message - the message related to the current request

session - the session to perform list file names command

dir - the remote directory to list file names

Returns:

the list of file/directory names in the provided dir

Throws:

IOException - the IO exception during performing remote command

Since:

5.0

rm

protected boolean rm(Message<?> message,
                     Session<F> session,
                     String remoteFilePath)
              throws IOException

Perform remote delete for the provided path. The message can be consulted to determine some context; isn't used in the default implementation.

Parameters:

message - the request message related to the path to remove

session - the remote protocol session to perform remove command

remoteFilePath - the remote path to remove

Returns:

true or false as a result of the remote removal

Throws:

IOException - the IO exception during performing remote command

Since:

5.0

mv

protected boolean mv(Message<?> message,
                     Session<F> session,
                     String remoteFilePath,
                     String remoteFileNewPath)
              throws IOException

Move one remote path to another. The message can be consulted to determine some context; isn't used in the default implementation.

Parameters:

message - the request message related to this move command

session - the remote protocol session to perform move command

remoteFilePath - the source remote path

remoteFileNewPath - the target remote path

Returns:

true or false as a result of the operation

Throws:

IOException - the IO exception during performing remote command

Since:

5.0

put

protected String put(Message<?> message,
                     Session<F> session,
                     String subDirectory)

Put the file based on the message to the remote server. The message can be consulted to determine some context. The session argument isn't used in the default implementation.

Parameters:

message - the request message related to this put command

session - the remote protocol session related to this invocation context

subDirectory - the target sub directory to put

Returns:

The remote path, or null if no local file was found.

Since:

5.0

doChmod

protected void doChmod(RemoteFileOperations<F> remoteFileOperations,
                       String path,
                       int chmodToSet)

Set the mode on the remote file after transfer; the default implementation does nothing.

Parameters:

remoteFileOperations - the remote file template.

path - the path.

chmodToSet - the chmod to set.

Since:

4.3

mPut

protected List<String> mPut(Message<?> message,
                            Session<F> session,
                            File localDir)

Put files from the provided directory to the remote server recursively. The message can be consulted to determine some context. The session argument isn't used in the default implementation.

Parameters:

message - the request message related to this mPut command

session - the remote protocol session for this invocation context

localDir - the local directory to mput to the server

Returns:

The list of remote paths for sent files

Since:

5.0

ls

protected List<?> ls(Message<?> message,
                     Session<F> session,
                     String dir)
              throws IOException

List remote files to local representation. The message can be consulted for some context for the current request; isn't used in the default implementation.

Parameters:

message - the message related to the list request

session - the session to perform list command

dir - the remote directory to list content

Returns:

the list of remote files

Throws:

IOException - the IO exception during performing remote command

filterFiles

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

filterMputFiles

protected final List<File> filterMputFiles(File[] files)

purgeLinks

protected void purgeLinks(List<F> lsFiles)

purgeDots

protected void purgeDots(List<F> lsFiles)

get

protected File get(Message<?> message,
                   Session<F> session,
                   String remoteDir,
                   String remoteFilePath,
                   String remoteFilename,
                   F fileInfoParam)
            throws IOException

Copy a remote file to the configured local directory.

Parameters:

message - the message.

session - the session.

remoteDir - the remote directory.

remoteFilePath - the remote file path.

remoteFilename - the remote file name.

fileInfoParam - the remote file info; if null we will execute an 'ls' command first.

Returns:

The file.

Throws:

IOException - Any IOException.

mGet

protected List<File> mGet(Message<?> message,
                          Session<F> session,
                          String remoteDirectory,
                          String remoteFilename)
                   throws IOException

Throws:

IOException

getRemoteFilename

protected String getRemoteFilename(String remoteFilePath)

Parameters:

remoteFilePath - The remote file path.

Returns:

The remote file name.

isDirectory

protected abstract boolean isDirectory(F file)

isLink

protected abstract boolean isLink(F file)

getFilename

protected abstract String getFilename(F file)

getFilename

protected abstract String getFilename(AbstractFileInfo<F> file)

getModified

protected abstract long getModified(F file)

asFileInfoList

protected abstract List<AbstractFileInfo<F>> asFileInfoList(Collection<F> files)

enhanceNameWithSubDirectory

protected abstract F enhanceNameWithSubDirectory(F file,
                                                 String directory)