org.openide.loaders

Class DataFolder

java.lang.Object

org.openide.loaders.DataObject

org.openide.loaders.MultiDataObject

org.openide.loaders.DataFolder

All Implemented Interfaces:

Serializable, DataObject.Container, Node.Cookie, HelpCtx.Provider, Lookup.Provider

public class DataFolder
extends MultiDataObject
implements DataObject.Container

A folder containing data objects. Is actually itself a data object, whose primary (and only) file object is a file folder.

Has special support for determining the sorting of the folder, or even explicit ordering of the children.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	DataFolder.FolderNode Node for a folder.
static class	DataFolder.Index Support for index cookie for folder nodes.
static class	DataFolder.SortMode Type-safe enumeration of sort modes for data folders.

Nested classes/interfaces inherited from class org.openide.loaders.MultiDataObject

MultiDataObject.Entry

Nested classes/interfaces inherited from class org.openide.loaders.DataObject

DataObject.Container, DataObject.Factory, DataObject.Registration, DataObject.Registrations, DataObject.Registry

Field Summary

Fields

Modifier and Type	Field and Description
static String	PROP_CHILDREN Name of property that holds children of this node.
static String	PROP_ORDER Name of property for order of children.
static String	PROP_SORT_MODE Name of property which decides sorting mode.
static String	SET_SORTING Name of set with sorting options.

Fields inherited from class org.openide.loaders.DataObject

PROP_COOKIE, PROP_FILES, PROP_HELP, PROP_MODIFIED, PROP_NAME, PROP_PRIMARY_FILE, PROP_TEMPLATE, PROP_VALID

Constructor Summary

Constructors

Modifier	Constructor and Description
	DataFolder(FileObject fo) Deprecated. This method should not be used in client code. If you are searching for a DataFolder for a FileObject use DataFolder.findFolder(org.openide.filesystems.FileObject) factory method.
protected	DataFolder(FileObject fo, DataLoader loader) Deprecated. Since 1.13 do not use this constructor, it is for backward compatibility only.
protected	DataFolder(FileObject fo, MultiFileLoader loader) Create a data folder from a folder file object.

Method Summary

Modifier and Type	Method and Description
Enumeration<DataObject>	children() Get enumeration of children of this folder.
Enumeration<DataObject>	children(boolean rec) Enumerate all children of this folder.
static DataFolder	create(DataFolder folder, String name) Helper method to find or create a folder of a given path.
Children	createNodeChildren(DataFilter filter) Support method to obtain a children object that can be added to any Node.
protected Node	createNodeDelegate() Create node representative for this folder.
static DataObject.Container	findContainer(FileObject fo) Finds a DataObject.Container representing given folder.
static DataFolder	findFolder(FileObject fo) Create a folder for a specified file object.
DataObject[]	getChildren() Get the children of this folder.
HelpCtx	getHelpCtx() Get help context for this object.
Lookup	getLookup() Represents a context of the data object.
String	getName() Get the name of the data folder.
DataFolder.SortMode	getSortMode() Get the sort mode of the folder.
protected DataObject	handleCopy(DataFolder f) Copies primary and secondary files to new folder.
protected DataObject	handleCreateFromTemplate(DataFolder f, String name) Create a new data object from template (implemented in subclasses).
protected DataShadow	handleCreateShadow(DataFolder f) Creates shadow for this object in specified folder (overridable in subclasses).
protected void	handleDelete() Delete this object (implemented by subclasses).
protected FileObject	handleMove(DataFolder df) Moves primary and secondary files to a new folder.
protected FileObject	handleRename(String name) Rename this object (implemented in subclasses).
boolean	isCopyAllowed() Test whether the object may be copied.
boolean	isDeleteAllowed() Test whether the object may be deleted.
boolean	isMoveAllowed() Test whether the object may be moved.
boolean	isRenameAllowed() Test whether the object may be renamed.
void	setOrder(DataObject[] arr) Set the order of the children.
void	setSortMode(DataFolder.SortMode mode) Set the sort mode for the folder.

Methods inherited from class org.openide.loaders.MultiDataObject

addSecondaryEntry, associateLookup, files, findSecondaryEntry, getCookie, getCookieSet, getMultiFileLoader, getPrimaryEntry, handleCopyRename, registerEditor, registerEntry, removeSecondaryEntry, secondaryEntries, setCookieSet, takePrimaryFileLock

Methods inherited from class org.openide.loaders.DataObject

addPropertyChangeListener, addVetoableChangeListener, copy, createFromTemplate, createFromTemplate, createFromTemplate, createShadow, delete, dispose, find, firePropertyChange, fireVetoableChange, getCookie, getFolder, getLoader, getNodeDelegate, getPrimaryFile, getRegistry, isModified, isShadowAllowed, isTemplate, isValid, markFiles, move, removePropertyChangeListener, removeVetoableChangeListener, rename, setModified, setTemplate, setValid, toString, writeReplace

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openide.loaders.DataObject.Container

addPropertyChangeListener, removePropertyChangeListener

Field Detail

PROP_CHILDREN

public static final String PROP_CHILDREN

Name of property that holds children of this node.

See Also:

Constant Field Values

PROP_SORT_MODE

public static final String PROP_SORT_MODE

Name of property which decides sorting mode.

See Also:

Constant Field Values

PROP_ORDER

public static final String PROP_ORDER

Name of property for order of children.

See Also:

Constant Field Values

SET_SORTING

public static final String SET_SORTING

Name of set with sorting options.

See Also:

Constant Field Values

Constructor Detail

DataFolder

@Deprecated
public DataFolder(FileObject fo)
                       throws DataObjectExistsException,
                              IllegalArgumentException

Deprecated. This method should not be used in client code. If you are searching for a DataFolder for a FileObject use DataFolder.findFolder(org.openide.filesystems.FileObject) factory method.

Create a data folder from a folder file object.

Parameters:

fo - file folder to work on

Throws:

DataObjectExistsException - if there is one already

IllegalArgumentException - if fo is not folder

DataFolder

protected DataFolder(FileObject fo,
                     MultiFileLoader loader)
              throws DataObjectExistsException,
                     IllegalArgumentException

Create a data folder from a folder file object.

Parameters:

fo - file folder to work on

loader - data loader for this data object

Throws:

DataObjectExistsException - if there is one already

IllegalArgumentException - if fo is not folder

DataFolder

@Deprecated
protected DataFolder(FileObject fo,
                                 DataLoader loader)
                          throws DataObjectExistsException,
                                 IllegalArgumentException

Deprecated. Since 1.13 do not use this constructor, it is for backward compatibility only.

Create a data folder from a folder file object.

Parameters:

fo - file folder to work on

loader - data loader for this data object

Throws:

DataObjectExistsException - if there is one already

IllegalArgumentException - if fo is not folder

Method Detail

create

public static DataFolder create(DataFolder folder,
                                String name)
                         throws IOException

Helper method to find or create a folder of a given path. Tries to find such a subfolder, or creates it if it needs to.

Parameters:

folder - the folder to start in

name - a subfolder path (e.g. com/mycom/testfolder)

Returns:

a folder with the given name

Throws:

IOException - if the I/O fails

setSortMode

public final void setSortMode(DataFolder.SortMode mode)
                       throws IOException

Set the sort mode for the folder.

Parameters:

mode - an constant from DataFolder.SortMode

Throws:

IOException - if the mode cannot be set

getSortMode

public final DataFolder.SortMode getSortMode()

Get the sort mode of the folder.

Returns:

the sort mode

setOrder

public final void setOrder(DataObject[] arr)
                    throws IOException

Set the order of the children. The provided array defines the order of some children for the folder. Such children will be returned at the beginning of the array returned from DataFolder.getChildren(). If there are any other children, they will be appended to the array.

Parameters:

arr - array of data objects (children of this folder) to define the order; or null if any particular ordering should be cancelled

Throws:

IOException - if the order cannot be set

getLookup

public Lookup getLookup()

Description copied from class: DataObject

Represents a context of the data object. This method is a more general replacement for DataObject.getCookie(java.lang.Class<T>) and should preferably be used instead of the old method. The default implementation inside a data object returns the getNodeDelegate().getLookup() - which is the most compatible behaviour with previous versions. However this code has significant potential to deadlocks. That is why the preferred advice is to override the method to:

 class MyDataObject extends MultiDataObject {
   public @Override Lookup getLookup() {
     return getCookieSet().getLookup();
   }
 }
 

Warning: the DataObject.getCookie(java.lang.Class<T>) method and DataObject.getLookup() method are ment to be interchangable - e.g. if you override one of them be sure to override also the other and try as much as possible to keep the same content in each of them. The default implementation tries to do that as much as possible.

Specified by:

getLookup in interface Lookup.Provider

Overrides:

getLookup in class MultiDataObject

Returns:

lookup representing this data object and its content

getName

public String getName()

Get the name of the data folder.

This implementation uses the name and extension of the primary file.

Overrides:

getName in class DataObject

Returns:

the name

getChildren

public DataObject[] getChildren()

Get the children of this folder.

Specified by:

getChildren in interface DataObject.Container

Returns:

array of children

children

public Enumeration<DataObject> children()

Get enumeration of children of this folder.

Returns:

enumeration of DataObjects

children

public Enumeration<DataObject> children(boolean rec)

Enumerate all children of this folder. If the children should be enumerated recursively, first all direct children are listed; then children of direct subfolders; and so on.

Parameters:

rec - whether to enumerate recursively

Returns:

enumeration of type DataObject

createNodeDelegate

protected Node createNodeDelegate()

Create node representative for this folder.

Overrides:

createNodeDelegate in class MultiDataObject

Returns:

the node representation

See Also:

DataNode

createNodeChildren

public Children createNodeChildren(DataFilter filter)

Support method to obtain a children object that can be added to any Node. The provided filter can be used to exclude some objects from the list.

Overriding this method is deprecated!

Parameters:

filter - filter of data objects

Returns:

children object representing content of this folder

isDeleteAllowed

public boolean isDeleteAllowed()

Description copied from class: DataObject

Test whether the object may be deleted.

Overrides:

isDeleteAllowed in class MultiDataObject

Returns:

true if it may

isCopyAllowed

public boolean isCopyAllowed()

Description copied from class: DataObject

Test whether the object may be copied.

Overrides:

isCopyAllowed in class MultiDataObject

Returns:

true if it may

isMoveAllowed

public boolean isMoveAllowed()

Description copied from class: DataObject

Test whether the object may be moved.

Overrides:

isMoveAllowed in class MultiDataObject

Returns:

true if it may

isRenameAllowed

public boolean isRenameAllowed()

Description copied from class: DataObject

Test whether the object may be renamed.

Overrides:

isRenameAllowed in class MultiDataObject

Returns:

true if it may

getHelpCtx

public HelpCtx getHelpCtx()

Description copied from class: DataObject

Get help context for this object.

Specified by:

getHelpCtx in interface HelpCtx.Provider

Overrides:

getHelpCtx in class MultiDataObject

Returns:

the help context

findFolder

public static DataFolder findFolder(FileObject fo)

Create a folder for a specified file object.

Parameters:

fo - file object

Returns:

folder for the file object

Throws:

IllegalArgumentException - if the file object is not folder or if its responsible loader prevents the data object from being instantiated - e.g. DataObject.find(org.openide.filesystems.FileObject) throws DataObjectNotFoundException

findContainer

public static DataObject.Container findContainer(FileObject fo)

Finds a DataObject.Container representing given folder.

Parameters:

fo - file object (must be folder)

Returns:

the container for the file object

Throws:

IllegalArgumentException - if the file object is not folder

Since:

1.11

handleCopy

protected DataObject handleCopy(DataFolder f)
                         throws IOException

Description copied from class: MultiDataObject

Copies primary and secondary files to new folder. May ask for user confirmation before overwriting.

Overrides:

handleCopy in class MultiDataObject

Parameters:

f - the new folder

Returns:

data object for the new primary

Throws:

IOException - if there was a problem copying

UserCancelException - if the user cancelled the copy

handleDelete

protected void handleDelete()
                     throws IOException

Description copied from class: DataObject

Delete this object (implemented by subclasses).

Overrides:

handleDelete in class MultiDataObject

Throws:

IOException - if an error occures

handleRename

protected FileObject handleRename(String name)
                           throws IOException

Description copied from class: DataObject

Rename this object (implemented in subclasses).

Overrides:

handleRename in class MultiDataObject

Parameters:

name - name to rename the object to

Returns:

new primary file of the object

Throws:

IOException - if an error occures

handleMove

protected FileObject handleMove(DataFolder df)
                         throws IOException

Description copied from class: MultiDataObject

Moves primary and secondary files to a new folder. May ask for user confirmation before overwriting.

Overrides:

handleMove in class MultiDataObject

Parameters:

df - the new folder

Returns:

the moved primary file object

Throws:

IOException - if there was a problem moving

UserCancelException - if the user cancelled the move

handleCreateFromTemplate

protected DataObject handleCreateFromTemplate(DataFolder f,
                                              String name)
                                       throws IOException

Description copied from class: DataObject

Create a new data object from template (implemented in subclasses). This method should copy the content of the template to the destination folder and assign a new name to the new object.

Overrides:

handleCreateFromTemplate in class MultiDataObject

Parameters:

f - data folder to create object in

name - name to give to the new object (or null if the name should be chosen according to the template)

Returns:

the new data object

Throws:

IOException - if an error occured

handleCreateShadow

protected DataShadow handleCreateShadow(DataFolder f)
                                 throws IOException

Creates shadow for this object in specified folder (overridable in subclasses).

The default implementation creates a reference data shadow and pastes it into the specified folder.

Overrides:

handleCreateShadow in class DataObject

Parameters:

f - the folder to create a shortcut in

Returns:

the shadow

Throws:

IOException