Package org.eclipse.core.resources

Interface IFolder

All Superinterfaces:

IAdaptable, IContainer, IResource, ISchedulingRule

public interface IFolder
extends IContainer, IAdaptable

Folders may be leaf or non-leaf resources and may contain files and/or other folders. A folder resource is stored as a directory in the local file system.

Folders, like other resource types, may exist in the workspace but not be local; non-local folder resources serve as place-holders for folders whose properties have not yet been fetched from a repository.

Folders implement the IAdaptable interface; extensions are managed by the platform's adapter manager.

See Also:

• Platform.getAdapterManager()

Restriction:

This interface is not intended to be implemented by clients.

Restriction:

This interface is not intended to be extended by clients.

Field Summary

Fields inherited from interface org.eclipse.core.resources.IContainer

DO_NOT_CHECK_EXISTENCE, EXCLUDE_DERIVED, INCLUDE_HIDDEN, INCLUDE_PHANTOMS, INCLUDE_TEAM_PRIVATE_MEMBERS

Fields inherited from interface org.eclipse.core.resources.IResource

ALLOW_MISSING_LOCAL, ALWAYS_DELETE_PROJECT_CONTENT, AVOID_NATURE_CONFIG, BACKGROUND_REFRESH, CHECK_ANCESTORS, DEPTH_INFINITE, DEPTH_ONE, DEPTH_ZERO, DERIVED, FILE, FOLDER, FORCE, HIDDEN, KEEP_HISTORY, NEVER_DELETE_PROJECT_CONTENT, NONE, NULL_STAMP, PROJECT, REPLACE, ROOT, SHALLOW, TEAM_PRIVATE, VIRTUAL

Method Summary

Modifier and Type	Method	Description
void	create(boolean force, boolean local, IProgressMonitor monitor)	Creates a new folder resource as a member of this handle's parent resource.
void	create(int updateFlags, boolean local, IProgressMonitor monitor)	Creates a new folder resource as a member of this handle's parent resource.
void	createLink(URI location, int updateFlags, IProgressMonitor monitor)	Creates a new folder resource as a member of this handle's parent resource.
void	createLink(IPath localLocation, int updateFlags, IProgressMonitor monitor)	Creates a new folder resource as a member of this handle's parent resource.
void	delete(boolean force, boolean keepHistory, IProgressMonitor monitor)	Deletes this resource from the workspace.
IFile	getFile(String name)	Returns a handle to the file with the given name in this folder.
IFolder	getFolder(String name)	Returns a handle to the folder with the given name in this folder.
void	move(IPath destination, boolean force, boolean keepHistory, IProgressMonitor monitor)	Moves this resource so that it is located at the given path.

Methods inherited from interface org.eclipse.core.runtime.IAdaptable

getAdapter

Methods inherited from interface org.eclipse.core.resources.IContainer

createFilter, exists, findDeletedMembersWithHistory, findMember, findMember, findMember, findMember, getDefaultCharset, getDefaultCharset, getFile, getFilters, getFolder, members, members, members, setDefaultCharset, setDefaultCharset

Methods inherited from interface org.eclipse.core.resources.IResource

accept, accept, accept, accept, accept, clearHistory, copy, copy, copy, copy, createMarker, createMarker, createProxy, delete, delete, deleteMarkers, equals, exists, findMarker, findMarkers, findMaxProblemSeverity, getFileExtension, getFullPath, getLocalTimeStamp, getLocation, getLocationURI, getMarker, getModificationStamp, getName, getParent, getPathVariableManager, getPersistentProperties, getPersistentProperty, getProject, getProjectRelativePath, getRawLocation, getRawLocationURI, getResourceAttributes, getSessionProperties, getSessionProperty, getType, getWorkspace, isAccessible, isDerived, isDerived, isHidden, isHidden, isLinked, isLinked, isLocal, isPhantom, isReadOnly, isSynchronized, isTeamPrivateMember, isTeamPrivateMember, isVirtual, move, move, move, move, refreshLocal, revertModificationStamp, setDerived, setDerived, setHidden, setLocal, setLocalTimeStamp, setPersistentProperty, setReadOnly, setResourceAttributes, setSessionProperty, setTeamPrivateMember, touch

Methods inherited from interface org.eclipse.core.runtime.jobs.ISchedulingRule

contains, isConflicting

Method Details

create

void create(boolean force,
 boolean local,
 IProgressMonitor monitor)
     throws CoreException

Creates a new folder resource as a member of this handle's parent resource.

This is a convenience method, fully equivalent to:

   create((force ? FORCE : IResource.NONE), local, monitor);
 

This method changes resources; these changes will be reported in a subsequent resource change event, including an indication that the folder has been added to its parent.

This method is long-running; progress and cancellation are provided by the given progress monitor.

Parameters:

force - a flag controlling how to deal with resources that are not in sync with the local file system

local - a flag controlling whether or not the folder will be local after the creation

monitor - a progress monitor, or null if progress reporting is not desired

Throws:

CoreException - if this method fails. Reasons include:

• This resource already exists in the workspace.
• The workspace contains a resource of a different type at the same path as this resource.
• The parent of this resource does not exist.
• The parent of this resource is a project that is not open.
• The parent contains a resource of a different type at the same path as this resource.
• The parent of this resource is virtual, but this resource is not.
• The name of this resource is not valid (according to IWorkspace.validateName).
• The corresponding location in the local file system is occupied by a file (as opposed to a directory).
• The corresponding location in the local file system is occupied by a folder and force is false.
• Resource changes are disallowed during certain types of resource change event notification. See IResourceChangeEvent for more details.

OperationCanceledException - if the operation is canceled. Cancelation can occur even if no progress monitor is provided.

See Also:

• create(int,boolean,IProgressMonitor)

create

void create(int updateFlags,
 boolean local,
 IProgressMonitor monitor)
     throws CoreException

Creates a new folder resource as a member of this handle's parent resource.

The FORCE update flag controls how this method deals with cases where the workspace is not completely in sync with the local file system. If FORCE is not specified, the method will only attempt to create a directory in the local file system if there isn't one already. This option ensures there is no unintended data loss; it is the recommended setting. However, if FORCE is specified, this method will be deemed a success even if there already is a corresponding directory.

The IResource.DERIVED update flag indicates that this resource should immediately be set as a derived resource. Specifying this flag is equivalent to atomically calling IResource.setDerived(boolean) with a value of true immediately after creating the resource.

The IResource.TEAM_PRIVATE update flag indicates that this resource should immediately be set as a team private resource. Specifying this flag is equivalent to atomically calling IResource.setTeamPrivateMember(boolean) with a value of true immediately after creating the resource.

The IResource.HIDDEN update flag indicates that this resource should immediately be set as a hidden resource. Specifying this flag is equivalent to atomically calling IResource.setHidden(boolean) with a value of true immediately after creating the resource.

Update flags other than those listed above are ignored.

This method synchronizes this resource with the local file system.

This method changes resources; these changes will be reported in a subsequent resource change event, including an indication that the folder has been added to its parent.

This method is long-running; progress and cancellation are provided by the given progress monitor.

Parameters:

updateFlags - bit-wise or of update flag constants (IResource.FORCE, IResource.DERIVED, IResource.TEAM_PRIVATE) and IResource.VIRTUAL)

local - a flag controlling whether or not the folder will be local after the creation

monitor - a progress monitor, or null if progress reporting is not desired

Throws:

CoreException - if this method fails. Reasons include:

• This resource already exists in the workspace.
• The workspace contains a resource of a different type at the same path as this resource.
• The parent of this resource does not exist.
• The parent of this resource is a project that is not open.
• The parent contains a resource of a different type at the same path as this resource.
• The parent of this resource is virtual, but this resource is not.
• The name of this resource is not valid (according to IWorkspace.validateName).
• The corresponding location in the local file system is occupied by a file (as opposed to a directory).
• The corresponding location in the local file system is occupied by a folder and FORCE is not specified.
• Resource changes are disallowed during certain types of resource change event notification. See IResourceChangeEvent for more details.

OperationCanceledException - if the operation is canceled. Cancelation can occur even if no progress monitor is provided.

Since:

2.0

See Also:

• IResourceRuleFactory.createRule(IResource)

createLink

void createLink(IPath localLocation,
 int updateFlags,
 IProgressMonitor monitor)
         throws CoreException

Creates a new folder resource as a member of this handle's parent resource. The folder's contents will be located in the directory specified by the given file system path. The given path must be either an absolute file system path, or a relative path whose first segment is the name of a workspace path variable.

The ALLOW_MISSING_LOCAL update flag controls how this method deals with cases where the local file system directory to be linked does not exist, or is relative to a workspace path variable that is not defined. If ALLOW_MISSING_LOCAL is specified, the operation will succeed even if the local directory is missing, or the path is relative to an undefined variable. If ALLOW_MISSING_LOCAL is not specified, the operation will fail in the case where the local file system directory does not exist or the path is relative to an undefined variable.

The IResource.REPLACE update flag controls how this method deals with cases where a resource of the same name as the prospective link already exists. If IResource.REPLACE is specified, then the existing linked resource's location is replaced by localLocation's value. This does not cause the underlying file system contents of that resource to be deleted. If IResource.REPLACE is not specified, this method will fail if an existing resource exists of the same name.

The IResource.BACKGROUND_REFRESH update flag controls how this method synchronizes the new resource with the filesystem. If this flag is specified, resources on disk will be synchronized in the background after the method returns. Child resources of the link may not be available until this background refresh completes. If this flag is not specified, resources are synchronized in the foreground before this method returns.

The IResource.HIDDEN update flag indicates that this resource should immediately be set as a hidden resource. Specifying this flag is equivalent to atomically calling IResource.setHidden(boolean) with a value of true immediately after creating the resource.

Update flags other than those listed above are ignored.

This method changes resources; these changes will be reported in a subsequent resource change event, including an indication that the folder has been added to its parent.

This method is long-running; progress and cancellation are provided by the given progress monitor.

Parameters:

localLocation - a file system path where the folder should be linked

updateFlags - bit-wise or of update flag constants (IResource.ALLOW_MISSING_LOCAL, IResource.REPLACE, IResource.BACKGROUND_REFRESH, and IResource.HIDDEN)

monitor - a progress monitor, or null if progress reporting is not desired

Throws:

CoreException - if this method fails. Reasons include:

• This resource already exists in the workspace.
• The workspace contains a resource of a different type at the same path as this resource.
• The parent of this resource does not exist.
• The parent of this resource is not an open project
• The name of this resource is not valid (according to IWorkspace.validateName).
• The corresponding location in the local file system does not exist, or is relative to an undefined variable, and ALLOW_MISSING_LOCAL is not specified.
• The corresponding location in the local file system is occupied by a file (as opposed to a directory).
• Resource changes are disallowed during certain types of resource change event notification. See IResourceChangeEvent for more details.
• The team provider for the project which contains this folder does not permit linked resources.
• This folder's project contains a nature which does not permit linked resources.

OperationCanceledException - if the operation is canceled. Cancelation can occur even if no progress monitor is provided.

Since:

2.1

See Also:

• IResource.isLinked()
• IResource.ALLOW_MISSING_LOCAL
• IResource.REPLACE
• IResource.BACKGROUND_REFRESH
• IResource.HIDDEN

createLink

void createLink(URI location,
 int updateFlags,
 IProgressMonitor monitor)
         throws CoreException

Creates a new folder resource as a member of this handle's parent resource. The folder's contents will be located in the directory specified by the given file system URI. The given URI must be either absolute, or a relative URI whose first path segment is the name of a workspace path variable.

The ALLOW_MISSING_LOCAL update flag controls how this method deals with cases where the local file system directory to be linked does not exist, or is relative to a workspace path variable that is not defined. If ALLOW_MISSING_LOCAL is specified, the operation will succeed even if the local directory is missing, or the path is relative to an undefined variable. If ALLOW_MISSING_LOCAL is not specified, the operation will fail in the case where the local file system directory does not exist or the path is relative to an undefined variable.

The IResource.REPLACE update flag controls how this method deals with cases where a resource of the same name as the prospective link already exists. If IResource.REPLACE is specified, then any existing resource with the same name is removed from the workspace to make way for creation of the link. This does not cause the underlying file system contents of that resource to be deleted. If IResource.REPLACE is not specified, this method will fail if an existing resource exists of the same name.

The IResource.BACKGROUND_REFRESH update flag controls how this method synchronizes the new resource with the filesystem. If this flag is specified, resources on disk will be synchronized in the background after the method returns. Child resources of the link may not be available until this background refresh completes. If this flag is not specified, resources are synchronized in the foreground before this method returns.

The IResource.HIDDEN update flag indicates that this resource should immediately be set as a hidden resource. Specifying this flag is equivalent to atomically calling IResource.setHidden(boolean) with a value of true immediately after creating the resource.

Update flags other than those listed above are ignored.

This method changes resources; these changes will be reported in a subsequent resource change event, including an indication that the folder has been added to its parent.

This method is long-running; progress and cancellation are provided by the given progress monitor.

Parameters:

location - a file system path where the folder should be linked

updateFlags - bit-wise or of update flag constants (IResource.ALLOW_MISSING_LOCAL, IResource.REPLACE, IResource.BACKGROUND_REFRESH, and IResource.HIDDEN)

monitor - a progress monitor, or null if progress reporting is not desired

Throws:

CoreException - if this method fails. Reasons include:

• This resource already exists in the workspace.
• The workspace contains a resource of a different type at the same path as this resource.
• The parent of this resource does not exist.
• The parent of this resource is not an open project
• The name of this resource is not valid (according to IWorkspace.validateName).
• The corresponding location in the local file system does not exist, or is relative to an undefined variable, and ALLOW_MISSING_LOCAL is not specified.
• The corresponding location in the local file system is occupied by a file (as opposed to a directory).
• Resource changes are disallowed during certain types of resource change event notification. See IResourceChangeEvent for more details.
• The team provider for the project which contains this folder does not permit linked resources.
• This folder's project contains a nature which does not permit linked resources.

OperationCanceledException - if the operation is canceled. Cancelation can occur even if no progress monitor is provided.

Since:

3.2

See Also:

• IResource.isLinked()
• IResource.ALLOW_MISSING_LOCAL
• IResource.REPLACE
• IResource.BACKGROUND_REFRESH
• IResource.HIDDEN

delete

void delete(boolean force,
 boolean keepHistory,
 IProgressMonitor monitor)
     throws CoreException

Deletes this resource from the workspace.

This is a convenience method, fully equivalent to:

   delete((keepHistory ? KEEP_HISTORY : IResource.NONE) | (force ? FORCE : IResource.NONE), monitor);
 

This method changes resources; these changes will be reported in a subsequent resource change event, including an indication that this folder has been removed from its parent.

This method is long-running; progress and cancellation are provided by the given progress monitor.

Parameters:

force - a flag controlling whether resources that are not in sync with the local file system will be tolerated

keepHistory - a flag controlling whether files under this folder should be stored in the workspace's local history

monitor - a progress monitor, or null if progress reporting is not desired

Throws:

CoreException - if this method fails. Reasons include:

• This resource could not be deleted for some reason.
• This resource is out of sync with the local file system and force is false.
• Resource changes are disallowed during certain types of resource change event notification. See IResourceChangeEvent for more details.

OperationCanceledException - if the operation is canceled. Cancelation can occur even if no progress monitor is provided.

See Also:

• IResourceRuleFactory.deleteRule(IResource)
• IResource.delete(int,IProgressMonitor)

getFile

IFile getFile(String name)

Returns a handle to the file with the given name in this folder.

This is a resource handle operation; neither the resource nor the result need exist in the workspace. The validation check on the resource name/path is not done when the resource handle is constructed; rather, it is done automatically as the resource is created.

Parameters:

name - the string name of the member file

Returns:

the (handle of the) member file

See Also:

• getFolder(String)

getFolder

IFolder getFolder(String name)

Returns a handle to the folder with the given name in this folder.

This is a resource handle operation; neither the container nor the result need exist in the workspace. The validation check on the resource name/path is not done when the resource handle is constructed; rather, it is done automatically as the resource is created.

Parameters:

name - the string name of the member folder

Returns:

the (handle of the) member folder

See Also:

• getFile(String)

move

void move(IPath destination,
 boolean force,
 boolean keepHistory,
 IProgressMonitor monitor)
   throws CoreException

Moves this resource so that it is located at the given path.

This is a convenience method, fully equivalent to:

   move(destination, (keepHistory ? KEEP_HISTORY : IResource.NONE) | (force ? FORCE : IResource.NONE), monitor);
 

This method changes resources; these changes will be reported in a subsequent resource change event, including an indication that this folder has been removed from its parent and a new folder has been added to the parent of the destination.

This method is long-running; progress and cancellation are provided by the given progress monitor.

Parameters:

destination - the destination path

force - a flag controlling whether resources that are not in sync with the local file system will be tolerated

keepHistory - a flag controlling whether files under this folder should be stored in the workspace's local history

monitor - a progress monitor, or null if progress reporting is not desired

Throws:

CoreException - if this resource could not be moved. Reasons include:

• This resource does not exist.
• This resource or one of its descendents is not local.
• The resource corresponding to the parent destination path does not exist.
• The resource corresponding to the parent destination path is a closed project.
• A resource at destination path does exist.
• A resource of a different type exists at the destination path.
• This resource or one of its descendents is out of sync with the local file system and force is false.
• The workspace and the local file system are out of sync at the destination resource or one of its descendents.
• Resource changes are disallowed during certain types of resource change event notification. See IResourceChangeEvent for more details.

OperationCanceledException - if the operation is canceled. Cancelation can occur even if no progress monitor is provided.

See Also:

• IResourceRuleFactory.moveRule(IResource, IResource)
• IResource.move(IPath,int,IProgressMonitor)