Package org.eclipse.core.runtime.preferences

Class InstanceScope

java.lang.Object
org.eclipse.core.internal.preferences.AbstractScope
org.eclipse.core.runtime.preferences.InstanceScope
All Implemented Interfaces:
IScopeContext
public final class InstanceScope extends org.eclipse.core.internal.preferences.AbstractScope
Object representing the instance scope in the Eclipse preferences hierarchy. Can be used as a context for searching for preference values (in the IPreferencesService APIs) or for determining the correct preference node to set values in the store.

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.

Since:
3.0
See Also:

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final IScopeContext
    INSTANCE
    Singleton instance of an Instance Scope object.
    static final String
    SCOPE
    String constant (value of "instance") used for the scope name for the instance preference scope.

    Fields inherited from interface org.eclipse.core.runtime.preferences.IScopeContext

    BUNDLE_SCOPE_FILTER, PROPERTY_TYPE, TYPE_BUNDLE

  • Constructor Summary

    Constructors
    Constructor
    Description
    InstanceScope()
    Deprecated.
    call InstanceScope.INSTANCE instead.

  • Method Summary

    Modifier and Type
    Method
    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.

    Methods inherited from class org.eclipse.core.internal.preferences.AbstractScope

    equals, hashCode

    Methods inherited from class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • SCOPE

      public static final String SCOPE
      String constant (value of "instance") used for the scope name for the instance preference scope.
      See Also:

    • INSTANCE

      public static final IScopeContext INSTANCE
      Singleton instance of an Instance Scope object. Typical usage is: InstanceScope.INSTANCE.getNode(...);
      Since:
      3.4

  • Constructor Details

    • InstanceScope

      public InstanceScope()
      Deprecated.
      call InstanceScope.INSTANCE instead.
      Create and return a new instance scope instance.

  • Method Details

    • getLocation

      public IPath getLocation()
      Description copied from interface: IScopeContext
      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.

      Implementors may return null if the location is not known, is unavailable, or is not applicable to this scope.

      Specified by:
      getLocation in interface IScopeContext
      Specified by:
      getLocation in class org.eclipse.core.internal.preferences.AbstractScope
      Returns:
      a writable location in the file system or null

    • getName

      public String getName()
      Description copied from interface: IScopeContext
      Return the name of the scope that this context is associated with. Must not be null.
      Specified by:
      getName in interface IScopeContext
      Specified by:
      getName in class org.eclipse.core.internal.preferences.AbstractScope
      Returns:
      the name of the scope

    • getNode

      public IEclipsePreferences getNode(String qualifier)
      Description copied from interface: IScopeContext
      Return the preferences node that contains the preferences for the given qualifier or 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.

      Specified by:
      getNode in interface IScopeContext
      Overrides:
      getNode in class org.eclipse.core.internal.preferences.AbstractScope
      Parameters:
      qualifier - a qualifier for the preference name
      Returns:
      the node containing the plug-in preferences or null
      See Also: