Class OwnerAttributeProvider

java.lang.Object

com.google.common.jimfs.AttributeProvider

com.google.common.jimfs.OwnerAttributeProvider

final class OwnerAttributeProvider
extends AttributeProvider

Attribute provider that provides the FileOwnerAttributeView ("owner").

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	OwnerAttributeProvider.View	Implementation of FileOwnerAttributeView.

Field Summary

Fields

Modifier and Type	Field	Description
private static final com.google.common.collect.ImmutableSet<String>	ATTRIBUTES
private static final UserPrincipal	DEFAULT_OWNER

Constructor Summary

Constructors

Constructor	Description
OwnerAttributeProvider()

Method Summary

Modifier and Type	Method	Description
com.google.common.collect.ImmutableMap<String,?>	defaultValues(Map<String,?> userProvidedDefaults)	Returns a map containing the default attribute values for this provider.
com.google.common.collect.ImmutableSet<String>	fixedAttributes()	Returns the set of attributes that are always available from this provider.
@Nullable Object	get(File file, String attribute)	Returns the value of the given attribute in the given file or null if the attribute is not supported by this provider.
String	name()	Returns the view name that's used to get attributes from this provider.
void	set(File file, String view, String attribute, Object value, boolean create)	Sets the value of the given attribute in the given file object.
FileOwnerAttributeView	view(FileLookup lookup, com.google.common.collect.ImmutableMap<String, FileAttributeView> inheritedViews)	Returns a view of the file located by the given lookup callback.
Class<FileOwnerAttributeView>	viewType()	Returns the type of the view interface that this provider supports.

Methods inherited from class AttributeProvider

attributes, attributesType, checkNotCreate, checkType, inherits, invalidType, readAttributes, supports, unsettable

Methods inherited from class Object

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

Field Details

ATTRIBUTES

private static final com.google.common.collect.ImmutableSet<String> ATTRIBUTES

DEFAULT_OWNER

private static final UserPrincipal DEFAULT_OWNER

Constructor Details

OwnerAttributeProvider

OwnerAttributeProvider()

Method Details

name

public String name()

Description copied from class: AttributeProvider

Returns the view name that's used to get attributes from this provider.

Specified by:

name in class AttributeProvider

fixedAttributes

public com.google.common.collect.ImmutableSet<String> fixedAttributes()

Description copied from class: AttributeProvider

Returns the set of attributes that are always available from this provider.

Specified by:

fixedAttributes in class AttributeProvider

defaultValues

public com.google.common.collect.ImmutableMap<String,?> defaultValues(Map<String,?> userProvidedDefaults)

Description copied from class: AttributeProvider

Returns a map containing the default attribute values for this provider. The keys of the map are attribute identifier strings (in "view:attribute" form) and the value for each is the default value that should be set for that attribute when creating a new file.

The given map should be in the same format and contains user-provided default values. If the user provided any default values for attributes handled by this provider, those values should be checked to ensure they are of the correct type. Additionally, if any changes to a user-provided attribute are necessary (for example, creating an immutable defensive copy), that should be done. The resulting values should be included in the result map along with default values for any attributes the user did not provide a value for.

Overrides:

defaultValues in class AttributeProvider

get

public @Nullable Object get(File file,
 String attribute)

Description copied from class: AttributeProvider

Returns the value of the given attribute in the given file or null if the attribute is not supported by this provider.

Specified by:

get in class AttributeProvider

set

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

Description copied from class: AttributeProvider

Sets the value of the given attribute in the given file object. The create parameter indicates whether or not the value is being set upon creation of a new file via a user-provided FileAttribute.

Specified by:

set in class AttributeProvider

viewType

public Class<FileOwnerAttributeView> viewType()

Description copied from class: AttributeProvider

Returns the type of the view interface that this provider supports.

Specified by:

viewType in class AttributeProvider

view

public FileOwnerAttributeView view(FileLookup lookup,
 com.google.common.collect.ImmutableMap<String, FileAttributeView> inheritedViews)

Description copied from class: AttributeProvider

Returns a view of the file located by the given lookup callback. The given map contains the views inherited by this view.

Specified by:

view in class AttributeProvider