Package org.eclipse.core.resources

Interface IResourceRuleFactory

All Known Implementing Classes:
ResourceRuleFactory
public interface IResourceRuleFactory
A resource rule factory returns scheduling rules for API methods that modify the workspace. These rules can be used when creating jobs or other operations that perform a series of modifications on the workspace. This allows clients to implement two phase commit semantics, where all necessary rules are obtained prior to executing a long running operation.

Note that simple use of the workspace APIs does not require use of scheduling rules. All workspace API methods that modify the workspace will automatically obtain any scheduling rules needed to perform the modification. However, if you are aggregating a set of changes to the workspace using WorkspaceJob or ICoreRunnable you can use scheduling rules to lock a portion of the workspace for the duration of the job or runnable. If you provide a non-null scheduling rule, a runtime exception will occur if you try to modify a portion of the workspace that is not covered by the rule for the runnable or job.

If more than one rule is needed, they can be aggregated using the MultiRule.combine method. Simplifying a group of rules does not change the set of resources that are covered, but can improve job scheduling performance.

Note that null is a valid scheduling rule (indicating that no resources need to be locked), and thus all methods in this class may return null.

Since:
3.0
See Also:
Restriction:
This interface is not intended to be implemented by clients.
Restriction:
This interface is not intended to be extended by clients.

  • Method Details

    • createRule

      ISchedulingRule createRule(IResource resource)
      Returns the scheduling rule that is required for creating a project, folder, or file.
      Parameters:
      resource - the resource being created
      Returns:
      a scheduling rule, or null

    • buildRule

      ISchedulingRule buildRule()
      Returns the scheduling rule that is required for building a project or the entire workspace.
      Returns:
      a scheduling rule, or null

    • charsetRule

      ISchedulingRule charsetRule(IResource resource)
      Returns the scheduling rule that is required for changing the charset setting for a file or the default charset setting for a container.
      Parameters:
      resource - the resource for which the charset will be changed
      Returns:
      a scheduling rule, or null
      Since:
      3.1

    • derivedRule

      ISchedulingRule derivedRule(IResource resource)
      Returns the scheduling rule that is required for changing the derived flag on a resource.
      Parameters:
      resource - the resource for which the derived flag will be changed
      Returns:
      a scheduling rule, or null
      Since:
      3.6

    • copyRule

      ISchedulingRule copyRule(IResource source, IResource destination)
      Returns the scheduling rule that is required for copying a resource.
      Parameters:
      source - the source of the copy
      destination - the destination of the copy
      Returns:
      a scheduling rule, or null

    • deleteRule

      ISchedulingRule deleteRule(IResource resource)
      Returns the scheduling rule that is required for deleting a resource.
      Parameters:
      resource - the resource to be deleted
      Returns:
      a scheduling rule, or null

    • markerRule

      ISchedulingRule markerRule(IResource resource)
      Returns the scheduling rule that is required for creating, modifying, or deleting markers on a resource.
      Parameters:
      resource - the resource owning the marker to be modified
      Returns:
      a scheduling rule, or null

    • modifyRule

      ISchedulingRule modifyRule(IResource resource)
      Returns the scheduling rule that is required for modifying a resource. For files, modification includes setting and appending contents. For projects, modification includes opening or closing the project, or setting the project description using the IResource.AVOID_NATURE_CONFIG flag. For all resources touch is considered to be a modification.
      Parameters:
      resource - the resource being modified
      Returns:
      a scheduling rule, or null

    • moveRule

      ISchedulingRule moveRule(IResource source, IResource destination)
      Returns the scheduling rule that is required for moving a resource.
      Parameters:
      source - the source of the move
      destination - the destination of the move
      Returns:
      a scheduling rule, or null

    • refreshRule

      ISchedulingRule refreshRule(IResource resource)
      Returns the scheduling rule that is required for performing refreshLocal on a resource.
      Parameters:
      resource - the resource to refresh
      Returns:
      a scheduling rule, or null

    • validateEditRule

      ISchedulingRule validateEditRule(IResource[] resources)
      Returns the scheduling rule that is required for a validateEdit
      Parameters:
      resources - the resources to be validated
      Returns:
      a scheduling rule, or null