Class ResourcePropertySource
- All Implemented Interfaces:
IPropertySource
- Direct Known Subclasses:
FilePropertySource
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Field Summary
Modifier and TypeFieldDescriptionprotected IResource
protected String
protected static String
protected static String
protected static String
protected static IPropertyDescriptor[]
protected static IPropertyDescriptor[]
protected static String
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Constructor Summary
ConstructorDescriptionCreates a PropertySource and stores its IResource -
Method Summary
Modifier and TypeMethodDescriptionReturns a value for this property source that can be edited in a property sheet.protected File
Get the java.io.File equivalent of the passed IFile.Returns the list of property descriptors for this property source.getPropertyValue
(Object name) Returns the value of the property with the given id if it has one.boolean
isPropertySet
(Object property) Returns whether the value of the property with the given id has changed from its default value.void
resetPropertyValue
(Object property) TheResourcePropertySource
implementation of thisIPropertySource
method does nothing since all properties are read-only.void
setPropertyValue
(Object name, Object value) TheResourcePropertySource
implementation of thisIPropertySource
method does nothing since all properties are read-only.
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Field Details
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NOT_LOCAL_TEXT
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FILE_NOT_FOUND
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UNDEFINED_PATH_VARIABLE
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FILE_NOT_EXIST_TEXT
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element
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errorMessage
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propertyDescriptors
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propertyDescriptorsLinkVariable
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Constructor Details
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ResourcePropertySource
Creates a PropertySource and stores its IResource- Parameters:
res
- the resource for which this is a property source
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Method Details
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getEditableValue
Description copied from interface:IPropertySource
Returns a value for this property source that can be edited in a property sheet.This value is used when this
IPropertySource
is appearing in the property sheet as the value of a property of some otherIPropertySource
This value is passed as the input to a cell editor opening on an
IPropertySource
.This value is also used when an
IPropertySource
is being used as the value in asetPropertyValue
message. The receiver of the message would then typically use the editable value to update the original property source or construct a new instance.For example an email address which is a property source may have an editable value which is a string so that it can be edited in a text cell editor. The email address would also have a constructor or setter that takes the edited string so that an appropriate instance can be created or the original instance modified when the edited value is set.
This behavior is important for another reason. When the property sheet is showing properties for more than one object (multiple selection), a property sheet entry will display and edit a single value (typically coming from the first selected object). After a property has been edited in a cell editor, the same value is set as the property value for all of the objects. This is fine for primitive types but otherwise all of the objects end up with a reference to the same value. Thus by creating an editable value and using it to update the state of the original property source object, one is able to edit several property source objects at once (multiple selection).
- Specified by:
getEditableValue
in interfaceIPropertySource
- Returns:
- a value that can be edited
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getPropertyDescriptors
Description copied from interface:IPropertySource
Returns the list of property descriptors for this property source. ThegetPropertyValue
andsetPropertyValue
methods are used to read and write the actual property values by specifying the property ids from these property descriptors.Implementors should cache the descriptors as they will be asked for the descriptors with any edit/update. Since descriptors provide cell editors, returning the same descriptors if possible allows for efficient updating.
- Specified by:
getPropertyDescriptors
in interfaceIPropertySource
- Returns:
- the property descriptors
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getPropertyValue
Description copied from interface:IPropertySource
Returns the value of the property with the given id if it has one. Returnsnull
if the property's value isnull
value or if this source does not have the specified property.- Specified by:
getPropertyValue
in interfaceIPropertySource
- Parameters:
name
- the id of the property being set- Returns:
- the value of the property, or
null
- See Also:
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isPropertySet
Description copied from interface:IPropertySource
Returns whether the value of the property with the given id has changed from its default value. Returnsfalse
if this source does not have the specified property.If the notion of default value is not meaningful for the specified property then
false
is returned.- Specified by:
isPropertySet
in interfaceIPropertySource
- Parameters:
property
- the id of the property- Returns:
true
if the value of the specified property has changed from its original default value,false
if the specified property does not have a meaningful default value, andfalse
if this source does not have the specified property- See Also:
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resetPropertyValue
TheResourcePropertySource
implementation of thisIPropertySource
method does nothing since all properties are read-only.- Specified by:
resetPropertyValue
in interfaceIPropertySource
- Parameters:
property
- the id of the property being reset- See Also:
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setPropertyValue
TheResourcePropertySource
implementation of thisIPropertySource
method does nothing since all properties are read-only.- Specified by:
setPropertyValue
in interfaceIPropertySource
- Parameters:
name
- the id of the property being setvalue
- the new value for the property;null
is allowed- See Also:
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getFile
Get the java.io.File equivalent of the passed IFile. If the location does not exist then returnnull
- Parameters:
resource
- the resource to lookup- Returns:
- java.io.File or
null
.
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