weka.gui

Class GenericObjectEditor

java.lang.Object

weka.gui.GenericObjectEditor

All Implemented Interfaces:

PropertyEditor, CustomPanelSupplier

public class GenericObjectEditor
extends Object
implements PropertyEditor, CustomPanelSupplier

A PropertyEditor for objects. It can be used either in a static or a dynamic way.

In the static way (USE_DYNAMIC is false) the objects have been defined as editable in the GenericObjectEditor configuration file, which lists possible values that can be selected from, and themselves configured. The configuration file is called "GenericObjectEditor.props" and may live in either the location given by "user.home" or the current directory (this last will take precedence), and a default properties file is read from the Weka distribution. For speed, the properties file is read only once when the class is first loaded -- this may need to be changed if we ever end up running in a Java OS ;-).

If it is used in a dynamic way (the UseDynamic property of the GenericPropertiesCreator props file is set to true) then the classes to list are discovered by the GenericPropertiesCreator class (it checks the complete classpath).

Version:

$Revision: 7059 $

Author:

Len Trigg ([email protected]), Xin Xu ([email protected]), Richard Kirkby ([email protected]), FracPete (fracpete at waikato dot ac dot nz)

See Also:

GenericPropertiesCreator, GenericPropertiesCreator.useDynamic(), GenericPropertiesCreator.CREATOR_FILE, ClassDiscovery

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	GenericObjectEditor.CapabilitiesFilterDialog A dialog for selecting Capabilities to look for in the GOE tree.
class	GenericObjectEditor.GOEPanel Handles the GUI side of editing values.
class	GenericObjectEditor.GOETreeNode A specialized TreeNode for supporting filtering via Capabilities.
class	GenericObjectEditor.JTreePopupMenu Creates a popup menu containing a tree that is aware of the screen dimensions.

Field Summary

Fields

Modifier and Type	Field and Description
static String	GUIEDITORS_PROPERTY_FILE the properties files containing the class/editor mappings.

Constructor Summary

Constructors

Constructor and Description
GenericObjectEditor() Default constructor.
GenericObjectEditor(boolean canChangeClassInDialog) Constructor that allows specifying whether it is possible to change the class within the editor dialog.

Method Summary

Methods

Modifier and Type	Method and Description
void	addPropertyChangeListener(PropertyChangeListener l) Adds a PropertyChangeListener who will be notified of value changes.
String	getAsText() Returns null as we don't support getting/setting values as text.
Object	getBackup() Returns the backup object (may be null if there is no backup.
boolean	getCanChangeClassInDialog() Returns whether the user can change the class in the dialog.
Capabilities	getCapabilitiesFilter() Returns the current Capabilities filter, can be null.
JPopupMenu	getChooseClassPopupMenu() Returns a popup menu that allows the user to change the class of object.
static Vector<String>	getClassnames(String property) Returns the available classnames for a certain property in the props file.
Component	getCustomEditor() Returns the array editing component.
JPanel	getCustomPanel() Gets the custom panel used for editing the object.
String	getJavaInitializationString() Supposedly returns an initialization string to create a Object identical to the current one, including it's state, but this doesn't appear possible given that the initialization string isn't supposed to contain multiple statements.
String[]	getTags() Returns null as we don't support getting values as tags.
Object	getValue() Gets the current Object.
boolean	isPaintable() Returns true to indicate that we can paint a representation of the Object.
static void	main(String[] args) Tests out the Object editor from the command line.
static Object	makeCopy(Object source) Makes a copy of an object using serialization.
void	paintValue(Graphics gfx, Rectangle box) Paints a representation of the current Object.
static void	registerEditors() registers all the editors in Weka.
void	removeCapabilitiesFilter() Removes the current Capabilities filter.
void	removePropertyChangeListener(PropertyChangeListener l) Removes a PropertyChangeListener.
void	setAsText(String text) Returns null as we don't support getting/setting values as text.
void	setCanChangeClassInDialog(boolean value) Sets whether the user can change the class in the dialog.
void	setCapabilitiesFilter(Capabilities value) Sets the capabilities to use for filtering.
void	setClassType(Class type) Sets the class of values that can be edited.
void	setDefaultValue() Sets the current object to be the default, taken as the first item in the chooser.
void	setEnabled(boolean newVal) Sets whether the editor is "enabled", meaning that the current values will be painted.
void	setValue(Object o) Sets the current Object.
static Hashtable	sortClassesByRoot(String classes) parses the given string of classes separated by ", " and returns the a hashtable with as many entries as there are different root elements in the class names (the key is the root element).
boolean	supportsCustomEditor() Returns true because we do support a custom editor.

Methods inherited from class java.lang.Object

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

Field Detail

GUIEDITORS_PROPERTY_FILE

public static final String GUIEDITORS_PROPERTY_FILE

the properties files containing the class/editor mappings.

See Also:

Constant Field Values

Constructor Detail

GenericObjectEditor

public GenericObjectEditor()

Default constructor.

GenericObjectEditor

public GenericObjectEditor(boolean canChangeClassInDialog)

Constructor that allows specifying whether it is possible to change the class within the editor dialog.

Parameters:

canChangeClassInDialog - whether the user can change the class

Method Detail

registerEditors

public static void registerEditors()

registers all the editors in Weka.

setCanChangeClassInDialog

public void setCanChangeClassInDialog(boolean value)

Sets whether the user can change the class in the dialog.

Parameters:

value - if true then the user can change the class

getCanChangeClassInDialog

public boolean getCanChangeClassInDialog()

Returns whether the user can change the class in the dialog.

Returns:

true if the user can change the class

getBackup

public Object getBackup()

Returns the backup object (may be null if there is no backup.

Returns:

the backup object

sortClassesByRoot

public static Hashtable sortClassesByRoot(String classes)

parses the given string of classes separated by ", " and returns the a hashtable with as many entries as there are different root elements in the class names (the key is the root element). E.g. if there's only "weka." as the prefix for all classes the a hashtable of size 1 is returned. if NULL is the input, then NULL is also returned.

Parameters:

classes - the classnames to work on

Returns:

for each distinct root element in the classnames, one entry in the hashtable (with the root element as key)

setEnabled

public void setEnabled(boolean newVal)

Sets whether the editor is "enabled", meaning that the current values will be painted.

Parameters:

newVal - a value of type 'boolean'

setClassType

public void setClassType(Class type)

Sets the class of values that can be edited.

Parameters:

type - a value of type 'Class'

setDefaultValue

public void setDefaultValue()

Sets the current object to be the default, taken as the first item in the chooser.

setValue

public void setValue(Object o)

Sets the current Object. If the Object is in the Object chooser, this becomes the selected item (and added to the chooser if necessary).

Specified by:

setValue in interface PropertyEditor

Parameters:

o - an object that must be a Object.

getValue

public Object getValue()

Gets the current Object.

Specified by:

getValue in interface PropertyEditor

Returns:

the current Object

getJavaInitializationString

public String getJavaInitializationString()

Supposedly returns an initialization string to create a Object identical to the current one, including it's state, but this doesn't appear possible given that the initialization string isn't supposed to contain multiple statements.

Specified by:

getJavaInitializationString in interface PropertyEditor

Returns:

the java source code initialisation string

isPaintable

public boolean isPaintable()

Returns true to indicate that we can paint a representation of the Object.

Specified by:

isPaintable in interface PropertyEditor

Returns:

true

paintValue

public void paintValue(Graphics gfx,
              Rectangle box)

Paints a representation of the current Object.

Specified by:

paintValue in interface PropertyEditor

Parameters:

gfx - the graphics context to use

box - the area we are allowed to paint into

getAsText

public String getAsText()

Returns null as we don't support getting/setting values as text.

Specified by:

getAsText in interface PropertyEditor

Returns:

null

setAsText

public void setAsText(String text)

Returns null as we don't support getting/setting values as text.

Specified by:

setAsText in interface PropertyEditor

Parameters:

text - the text value

Throws:

IllegalArgumentException - as we don't support getting/setting values as text.

getTags

public String[] getTags()

Returns null as we don't support getting values as tags.

Specified by:

getTags in interface PropertyEditor

Returns:

null

supportsCustomEditor

public boolean supportsCustomEditor()

Returns true because we do support a custom editor.

Specified by:

supportsCustomEditor in interface PropertyEditor

Returns:

true

getCustomEditor

public Component getCustomEditor()

Returns the array editing component.

Specified by:

getCustomEditor in interface PropertyEditor

Returns:

a value of type 'java.awt.Component'

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener l)

Adds a PropertyChangeListener who will be notified of value changes.

Specified by:

addPropertyChangeListener in interface PropertyEditor

Parameters:

l - a value of type 'PropertyChangeListener'

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener l)

Removes a PropertyChangeListener.

Specified by:

removePropertyChangeListener in interface PropertyEditor

Parameters:

l - a value of type 'PropertyChangeListener'

getCustomPanel

public JPanel getCustomPanel()

Gets the custom panel used for editing the object.

Specified by:

getCustomPanel in interface CustomPanelSupplier

Returns:

the panel

getChooseClassPopupMenu

public JPopupMenu getChooseClassPopupMenu()

Returns a popup menu that allows the user to change the class of object.

Returns:

a JPopupMenu that when shown will let the user choose the class

setCapabilitiesFilter

public void setCapabilitiesFilter(Capabilities value)

Sets the capabilities to use for filtering.

Parameters:

value - the object to get the filter capabilities from

getCapabilitiesFilter

public Capabilities getCapabilitiesFilter()

Returns the current Capabilities filter, can be null.

Returns:

the current Capabiliities used for filtering

removeCapabilitiesFilter

public void removeCapabilitiesFilter()

Removes the current Capabilities filter.

makeCopy

public static Object makeCopy(Object source)
                       throws Exception

Makes a copy of an object using serialization.

Parameters:

source - the object to copy

Returns:

a copy of the source object

Throws:

Exception - if the copy fails

getClassnames

public static Vector<String> getClassnames(String property)

Returns the available classnames for a certain property in the props file.

Parameters:

property - the property to get the classnames for

Returns:

the classnames

main

public static void main(String[] args)

Tests out the Object editor from the command line.

Parameters:

args - may contain the class name of a Object to edit