Class AttributeService

java.lang.Object

io.roastedroot.zerofs.AttributeService

final class AttributeService
extends Object

Service providing all attribute related operations for a file store. One piece of the file store implementation.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	AttributeService.SimpleFileAttribute<T>	Simple implementation of FileAttribute.

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	ALL_ATTRIBUTES
private static final String	ATTRIBUTE_SPLITTER
private final List<FileAttribute<?>>	defaultValues
private final Map<Class<?>, AttributeProvider>	providersByAttributesType
private final Map<String, AttributeProvider>	providersByName
private final Map<Class<?>, AttributeProvider>	providersByViewType

Constructor Summary

Constructors

Constructor	Description
AttributeService(Configuration configuration)	Creates a new attribute service using the given configuration.
AttributeService(Iterable<? extends AttributeProvider> providers, Map<String,?> userProvidedDefaults)	Creates a new attribute service using the given providers and user provided default attribute values.

Method Summary

Modifier and Type	Method	Description
private static void	addMissingProviders(Map<String, AttributeProvider> providers)
private static void	addStandardProvider(Map<String, AttributeProvider> result, String view)
void	copyAttributes(File file, File copy, AttributeCopyOption copyOption)	Copies the attributes of the given file to the given copy file.
private Map<String, FileAttributeView>	createInheritedViews(FileLookup lookup, AttributeProvider provider)
private void	createInheritedViews(FileLookup lookup, AttributeProvider provider, Map<String, FileAttributeView> inheritedViews)
Object	getAttribute(File file, String attribute)	Gets the value of the given attribute for the given file.
Object	getAttribute(File file, String view, String attribute)	Gets the value of the given attribute for the given view and file.
private Object	getAttributeInternal(File file, String view, String attribute)
private static List<String>	getAttributeNames(String attributes)
private FileAttributeView	getFileAttributeView(FileLookup lookup, Class<? extends FileAttributeView> viewType, Map<String, FileAttributeView> inheritedViews)
<V extends FileAttributeView> V	getFileAttributeView(FileLookup lookup, Class<V> type)	Returns an attribute view of the given type for the given file lookup callback, or null if the view type is not supported.
private static Iterable<AttributeProvider>	getProviders(Configuration configuration)
private static String	getSingleAttribute(String attribute)
private static String	getViewName(String attribute)
private static void	readAll(File file, AttributeProvider provider, Map<String,Object> map)
<A extends BasicFileAttributes> A	readAttributes(File file, Class<A> type)	Returns attributes of the given file as an object of the given type.
Map<String,Object>	readAttributes(File file, String attributes)	Implements Files.readAttributes(Path, String, LinkOption...).
void	setAttribute(File file, String attribute, Object value, boolean create)	Sets the value of the given attribute to the given value for the given file.
private void	setAttributeInternal(File file, String view, String attribute, Object value, boolean create)
void	setInitialAttributes(File file, FileAttribute<?>... attrs)	Sets all initial attributes for the given file, including the given attributes if possible.
Set<String>	supportedFileAttributeViews()	Implements FileSystem.supportedFileAttributeViews().
boolean	supportsFileAttributeView(Class<? extends FileAttributeView> type)	Implements FileStore.supportsFileAttributeView(Class).

Methods inherited from class Object

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

Field Details

ALL_ATTRIBUTES

private static final String ALL_ATTRIBUTES

See Also:

• Constant Field Values

providersByName

private final Map<String, AttributeProvider> providersByName

providersByViewType

private final Map<Class<?>, AttributeProvider> providersByViewType

providersByAttributesType

private final Map<Class<?>, AttributeProvider> providersByAttributesType

defaultValues

private final List<FileAttribute<?>> defaultValues

ATTRIBUTE_SPLITTER

private static final String ATTRIBUTE_SPLITTER

See Also:

• Constant Field Values

Constructor Details

AttributeService

public AttributeService(Configuration configuration)

Creates a new attribute service using the given configuration.

AttributeService

public AttributeService(Iterable<? extends AttributeProvider> providers,
 Map<String,?> userProvidedDefaults)

Creates a new attribute service using the given providers and user provided default attribute values.

Method Details

getProviders

private static Iterable<AttributeProvider> getProviders(Configuration configuration)

addMissingProviders

private static void addMissingProviders(Map<String, AttributeProvider> providers)

addStandardProvider

private static void addStandardProvider(Map<String, AttributeProvider> result,
 String view)

supportedFileAttributeViews

public Set<String> supportedFileAttributeViews()

Implements FileSystem.supportedFileAttributeViews().

supportsFileAttributeView

public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type)

Implements FileStore.supportsFileAttributeView(Class).

setInitialAttributes

public void setInitialAttributes(File file,
 FileAttribute<?>... attrs)

Sets all initial attributes for the given file, including the given attributes if possible.

copyAttributes

public void copyAttributes(File file,
 File copy,
 AttributeCopyOption copyOption)

Copies the attributes of the given file to the given copy file.

getAttribute

public Object getAttribute(File file,
 String attribute)

Gets the value of the given attribute for the given file. attribute must be of the form "view:attribute" or "attribute".

getAttribute

public Object getAttribute(File file,
 String view,
 String attribute)

Gets the value of the given attribute for the given view and file. Neither view nor attribute may have a ':' character.

getAttributeInternal

private Object getAttributeInternal(File file,
 String view,
 String attribute)

setAttribute

public void setAttribute(File file,
 String attribute,
 Object value,
 boolean create)

Sets the value of the given attribute to the given value for the given file.

setAttributeInternal

private void setAttributeInternal(File file,
 String view,
 String attribute,
 Object value,
 boolean create)

getFileAttributeView

public <V extends FileAttributeView> V getFileAttributeView(FileLookup lookup,
 Class<V> type)

Returns an attribute view of the given type for the given file lookup callback, or null if the view type is not supported.

getFileAttributeView

private FileAttributeView getFileAttributeView(FileLookup lookup,
 Class<? extends FileAttributeView> viewType,
 Map<String, FileAttributeView> inheritedViews)

createInheritedViews

private Map<String, FileAttributeView> createInheritedViews(FileLookup lookup,
 AttributeProvider provider)

createInheritedViews

private void createInheritedViews(FileLookup lookup,
 AttributeProvider provider,
 Map<String, FileAttributeView> inheritedViews)

readAttributes

public Map<String,Object> readAttributes(File file,
 String attributes)

Implements Files.readAttributes(Path, String, LinkOption...).

readAttributes

public <A extends BasicFileAttributes> A readAttributes(File file,
 Class<A> type)

Returns attributes of the given file as an object of the given type.

Throws:

UnsupportedOperationException - if the given attributes type is not supported

readAll

private static void readAll(File file,
 AttributeProvider provider,
 Map<String,Object> map)

getViewName

private static String getViewName(String attribute)

getAttributeNames

private static List<String> getAttributeNames(String attributes)

getSingleAttribute

private static String getSingleAttribute(String attribute)