public final class InstanceScope extends org.eclipse.core.internal.preferences.AbstractScope implements IScopeContext
Instance preferences are stored on a per instance basis in the
platform's instance area as specified by the Location
class
and the Location.INSTANCE_FILTER
filter.
The path for preferences defined in the instance scope hierarchy
is as follows: /instance/<qualifier>
This class is not intended to be subclassed. This class may be instantiated.
Location.INSTANCE_FILTER
Modifier and Type | Field and Description |
---|---|
static String |
SCOPE
String constant (value of
"instance" ) used for the
scope name for the instance preference scope. |
Constructor and Description |
---|
InstanceScope()
Create and return a new instance scope instance.
|
Modifier and Type | Method and Description |
---|---|
IPath |
getLocation()
Return a path to a location in the file-system where clients are able
to write files that will have the same sharing/scope properties as
preferences defined in this scope.
|
String |
getName()
Return the name of the scope that this context is associated with.
|
IEclipsePreferences |
getNode(String qualifier)
Return the preferences node that contains the preferences for the
given qualifier or
null if the node cannot be determined. |
public static final String SCOPE
"instance"
) used for the
scope name for the instance preference scope.public InstanceScope()
public IPath getLocation()
IScopeContext
Implementors may return null
if the location is not known,
is unavailable, or is not applicable to this scope.
getLocation
in interface IScopeContext
getLocation
in class org.eclipse.core.internal.preferences.AbstractScope
null
public String getName()
IScopeContext
null
.getName
in interface IScopeContext
getName
in class org.eclipse.core.internal.preferences.AbstractScope
public IEclipsePreferences getNode(String qualifier)
IScopeContext
null
if the node cannot be determined.
The given qualifier must not be null
but may be a path
to a sub-node within the scope.
An example of a qualifier in Eclipse 2.1 would be the plug-in identifier that the preference is associated with (e.g. the "org.eclipse.core.resources" plug-in defines the "description.autobuild" preference).
This method can be used to determine the appropriate preferences node
to aid in setting key/value pairs. For instance:
new InstanceScope().getNode("org.eclipse.core.resources");
returns the preference node in the instance scope where the preferences
for "org.eclipse.core.resources" are stored.
getNode
in interface IScopeContext
getNode
in class org.eclipse.core.internal.preferences.AbstractScope
qualifier
- a qualifier for the preference namenull
IPreferencesService
Guidelines for using Eclipse APIs. Copyright (c) IBM Corp. and others 2000, 2006. All rights reserved.