Package org.eclipse.core.resources

Interface IResourceDelta

  • All Superinterfaces:
    IAdaptable
    public interface IResourceDelta
extends IAdaptable
    A resource delta represents changes in the state of a resource tree between two discrete points in time.

    Resource deltas implement the IAdaptable interface; extensions are managed by the platform's adapter manager.

    See Also:
    IResource, Platform.getAdapterManager()
    Restriction:
    This interface is not intended to be implemented by clients.
    Restriction:
    This interface is not intended to be extended by clients.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static int ADDED
      Delta kind constant (bit mask) indicating that the resource has been added to its parent.
      static int ADDED_PHANTOM
      Delta kind constant (bit mask) indicating that a phantom resource has been added at the location of the delta node.
      static int ALL_WITH_PHANTOMS
      The bit mask which describes all possible delta kinds, including ones involving phantoms.
      static int CHANGED
      Delta kind constant (bit mask) indicating that the resource has been changed.
      static int CONTENT
      Change constant (bit mask) indicating that the content of the resource has changed.
      static int COPIED_FROM
      Change constant (bit mask) indicating that the resource was copied from another location.
      static int DELETE_CONTENT_PROPOSED
      Change constant (bit mask) indicating that the content of the resource is proposed to be deleted.
      static int DERIVED_CHANGED
      Change constant (bit mask) indicating that the derived flag of the resource has changed.
      static int DESCRIPTION
      Change constant (bit mask) indicating that a project's description has changed.
      static int ENCODING
      Change constant (bit mask) indicating that the encoding of the resource has changed.
      static int LOCAL_CHANGED
      Change constant (bit mask) indicating that the underlying file or folder of the linked resource has been added or removed.
      static int MARKERS
      Change constant (bit mask) indicating that the resource's markers have changed.
      static int MOVED_FROM
      Change constant (bit mask) indicating that the resource was moved from another location.
      static int MOVED_TO
      Change constant (bit mask) indicating that the resource was moved to another location.
      static int NO_CHANGE
      Delta kind constant indicating that the resource has not been changed in any way.
      static int OPEN
      Change constant (bit mask) indicating that the resource was opened or closed.
      static int REMOVED
      Delta kind constant (bit mask) indicating that the resource has been removed from its parent.
      static int REMOVED_PHANTOM
      Delta kind constant (bit mask) indicating that a phantom resource has been removed from the location of the delta node.
      static int REPLACED
      Change constant (bit mask) indicating that the resource has been replaced by another at the same location (i.e., the resource has been deleted and then added).
      static int SYNC
      Change constant (bit mask) indicating that the resource's sync status has changed.
      static int TYPE
      Change constant (bit mask) indicating that the type of the resource has changed.

    • Field Detail

      • NO_CHANGE

        static final int NO_CHANGE
        Delta kind constant indicating that the resource has not been changed in any way.
        See Also:
        getKind(), Constant Field Values

      • ADDED

        static final int ADDED
        Delta kind constant (bit mask) indicating that the resource has been added to its parent. That is, one that appears in the "after" state, not in the "before" one.
        See Also:
        getKind(), Constant Field Values

      • REMOVED

        static final int REMOVED
        Delta kind constant (bit mask) indicating that the resource has been removed from its parent. That is, one that appears in the "before" state, not in the "after" one.
        See Also:
        getKind(), Constant Field Values

      • CHANGED

        static final int CHANGED
        Delta kind constant (bit mask) indicating that the resource has been changed. That is, one that appears in both the "before" and "after" states.
        See Also:
        getKind(), Constant Field Values

      • ADDED_PHANTOM

        static final int ADDED_PHANTOM
        Delta kind constant (bit mask) indicating that a phantom resource has been added at the location of the delta node.
        See Also:
        getKind(), Constant Field Values

      • REMOVED_PHANTOM

        static final int REMOVED_PHANTOM
        Delta kind constant (bit mask) indicating that a phantom resource has been removed from the location of the delta node.
        See Also:
        getKind(), Constant Field Values

      • ALL_WITH_PHANTOMS

        static final int ALL_WITH_PHANTOMS
        The bit mask which describes all possible delta kinds, including ones involving phantoms.
        See Also:
        getKind(), Constant Field Values

      • CONTENT

        static final int CONTENT
        Change constant (bit mask) indicating that the content of the resource has changed.
        See Also:
        getFlags(), Constant Field Values

      • MOVED_FROM

        static final int MOVED_FROM
        Change constant (bit mask) indicating that the resource was moved from another location. The location in the "before" state can be retrieved using getMovedFromPath().
        See Also:
        getFlags(), Constant Field Values

      • MOVED_TO

        static final int MOVED_TO
        Change constant (bit mask) indicating that the resource was moved to another location. The location in the new state can be retrieved using getMovedToPath().
        See Also:
        getFlags(), Constant Field Values

      • COPIED_FROM

        static final int COPIED_FROM
        Change constant (bit mask) indicating that the resource was copied from another location. The location in the "before" state can be retrieved using getMovedFromPath(). This flag is only used when describing potential changes using an IResourceChangeDescriptionFactory.
        Since:
        3.2
        See Also:
        getFlags(), Constant Field Values

      • OPEN

        static final int OPEN
        Change constant (bit mask) indicating that the resource was opened or closed. This flag is also set when the project did not exist in the "before" state. For example, if the current state of the resource is open then it was previously closed or did not exist.
        See Also:
        getFlags(), Constant Field Values

      • SYNC

        static final int SYNC
        Change constant (bit mask) indicating that the resource's sync status has changed. This type of change is not included in build deltas, only in those for resource notification.
        See Also:
        getFlags(), Constant Field Values

      • MARKERS

        static final int MARKERS
        Change constant (bit mask) indicating that the resource's markers have changed. This type of change is not included in build deltas, only in those for resource notification.
        See Also:
        getFlags(), Constant Field Values

      • REPLACED

        static final int REPLACED
        Change constant (bit mask) indicating that the resource has been replaced by another at the same location (i.e., the resource has been deleted and then added).
        See Also:
        getFlags(), Constant Field Values

      • DESCRIPTION

        static final int DESCRIPTION
        Change constant (bit mask) indicating that a project's description has changed.
        See Also:
        getFlags(), Constant Field Values

      • ENCODING

        static final int ENCODING
        Change constant (bit mask) indicating that the encoding of the resource has changed.
        Since:
        3.0
        See Also:
        getFlags(), Constant Field Values

      • LOCAL_CHANGED

        static final int LOCAL_CHANGED
        Change constant (bit mask) indicating that the underlying file or folder of the linked resource has been added or removed.
        Since:
        3.4
        See Also:
        getFlags(), Constant Field Values

      • DERIVED_CHANGED

        static final int DERIVED_CHANGED
        Change constant (bit mask) indicating that the derived flag of the resource has changed.
        Since:
        3.6
        See Also:
        getFlags(), Constant Field Values

      • DELETE_CONTENT_PROPOSED

        static final int DELETE_CONTENT_PROPOSED
        Change constant (bit mask) indicating that the content of the resource is proposed to be deleted. This flag can only be found in deltas created by IResourceChangeDescriptionFactory and indicates that the underlined file object is proposed to be deleted from the file system (as opposite to the change where only workspace model is deleted).
        Since:
        3.16
        See Also:
        IResourceChangeDescriptionFactory, getFlags(), Constant Field Values

    • Method Detail

      • accept

        void accept​(IResourceDeltaVisitor visitor)
     throws CoreException
        Accepts the given visitor. The only kinds of resource deltas visited are ADDED, REMOVED, and CHANGED. The visitor's visit method is called with this resource delta if applicable. If the visitor returns true, the resource delta's children are also visited.

        This is a convenience method, fully equivalent to accept(visitor, IResource.NONE). Although the visitor will be invoked for this resource delta, it will not be invoked for any team-private member resources.

        Parameters:
        visitor - the visitor
        Throws:
        CoreException - if the visitor failed with this exception.
        See Also:
        IResourceDeltaVisitor.visit(IResourceDelta)

      • accept

        void accept​(IResourceDeltaVisitor visitor,
            boolean includePhantoms)
     throws CoreException
        Accepts the given visitor. The visitor's visit method is called with this resource delta. If the visitor returns true, the resource delta's children are also visited.

        This is a convenience method, fully equivalent to:

           accept(visitor, includePhantoms ? INCLUDE_PHANTOMS : IResource.NONE);

        Although the visitor will be invoked for this resource delta, it will not be invoked for any team-private member resources.

        Parameters:
        visitor - the visitor
        includePhantoms - true if phantom resources are of interest; false if phantom resources are not of interest
        Throws:
        CoreException - if the visitor failed with this exception.
        See Also:
        accept(IResourceDeltaVisitor), IResource.isPhantom(), IResourceDeltaVisitor.visit(IResourceDelta)

      • accept

        void accept​(IResourceDeltaVisitor visitor,
            int memberFlags)
     throws CoreException
        Accepts the given visitor. The visitor's visit method is called with this resource delta. If the visitor returns true, the resource delta's children are also visited.

        The member flags determine which child deltas of this resource delta will be visited. The visitor will always be invoked for this resource delta.

        If the INCLUDE_PHANTOMS member flag is not specified (recommended), only child resource deltas involving existing resources will be visited (kinds ADDED, REMOVED, and CHANGED). If the INCLUDE_PHANTOMS member flag is specified, the result will also include additions and removes of phantom resources (kinds ADDED_PHANTOM and REMOVED_PHANTOM).

        If the INCLUDE_TEAM_PRIVATE_MEMBERS member flag is not specified (recommended), resource deltas involving team private member resources will be excluded from the visit. If the INCLUDE_TEAM_PRIVATE_MEMBERS member flag is specified, the visit will also include additions and removes of team private member resources.

        Parameters:
        visitor - the visitor
        memberFlags - bit-wise or of member flag constants (IContainer.INCLUDE_PHANTOMS, INCLUDE_HIDDEN and INCLUDE_TEAM_PRIVATE_MEMBERS) indicating which members are of interest
        Throws:
        CoreException - if the visitor failed with this exception.
        Since:
        2.0
        See Also:
        IResource.isPhantom(), IResource.isTeamPrivateMember(), IResource.isHidden(), IContainer.INCLUDE_PHANTOMS, IContainer.INCLUDE_TEAM_PRIVATE_MEMBERS, IContainer.INCLUDE_HIDDEN, IResourceDeltaVisitor.visit(IResourceDelta)

      • findMember

        IResourceDelta findMember​(IPath path)
        Finds and returns the descendent delta identified by the given path in this delta, or null if no such descendent exists. The supplied path may be absolute or relative; in either case, it is interpreted as relative to this delta. Trailing separators are ignored. If the path is empty this delta is returned.

        This is a convenience method to avoid manual traversal of the delta tree in cases where the listener is only interested in changes to particular resources. Calling this method will generally be faster than manually traversing the delta to a particular descendent.

        Parameters:
        path - the path of the desired descendent delta
        Returns:
        the descendent delta, or null if no such descendent exists in the delta
        Since:
        2.0

      • getAffectedChildren

        IResourceDelta[] getAffectedChildren()
        Returns resource deltas for all children of this resource which were added, removed, or changed. Returns an empty array if there are no affected children.

        This is a convenience method, fully equivalent to:

           getAffectedChildren(ADDED | REMOVED | CHANGED, IResource.NONE);

        Team-private member resources are not included in the result; neither are phantom resources.

        Returns:
        the resource deltas for all affected children
        See Also:
        ADDED, REMOVED, CHANGED, getAffectedChildren(int,int)

      • getAffectedChildren

        IResourceDelta[] getAffectedChildren​(int kindMask)
        Returns resource deltas for all children of this resource whose kind is included in the given mask. Kind masks are formed by the bitwise or of IResourceDelta kind constants. Returns an empty array if there are no affected children.

        This is a convenience method, fully equivalent to:

           getAffectedChildren(kindMask, IResource.NONE);

        Team-private member resources are not included in the result.

        Parameters:
        kindMask - a mask formed by the bitwise or of IResourceDelta delta kind constants
        Returns:
        the resource deltas for all affected children
        See Also:
        ADDED, REMOVED, CHANGED, ADDED_PHANTOM, REMOVED_PHANTOM, ALL_WITH_PHANTOMS, getAffectedChildren(int,int)

      • getAffectedChildren

        IResourceDelta[] getAffectedChildren​(int kindMask,
                                     int memberFlags)
        Returns resource deltas for all children of this resource whose kind is included in the given mask. Masks are formed by the bitwise or of IResourceDelta kind constants. Returns an empty array if there are no affected children.

        If the INCLUDE_TEAM_PRIVATE_MEMBERS member flag is not specified, (recommended), resource deltas involving team private member resources will be excluded. If the INCLUDE_TEAM_PRIVATE_MEMBERS member flag is specified, the result will also include resource deltas of the specified kinds to team private member resources.

        If the IContainer.INCLUDE_HIDDEN member flag is not specified, (recommended), resource deltas involving hidden resources will be excluded. If the IContainer.INCLUDE_HIDDEN member flag is specified, the result will also include resource deltas of the specified kinds to hidden resources.

        Specifying the IContainer.INCLUDE_PHANTOMS member flag is equivalent to including IContainer.ADDED_PHANTOM and IContainer.REMOVED_PHANTOM in the kind mask.

        Parameters:
        kindMask - a mask formed by the bitwise or of IResourceDelta delta kind constants
        memberFlags - bit-wise or of member flag constants (IContainer.INCLUDE_PHANTOMS, IContainer.INCLUDE_TEAM_PRIVATE_MEMBERS and IContainer.INCLUDE_HIDDEN) indicating which members are of interest
        Returns:
        the resource deltas for all affected children
        Since:
        2.0
        See Also:
        ADDED, REMOVED, CHANGED, ADDED_PHANTOM, REMOVED_PHANTOM, ALL_WITH_PHANTOMS, IContainer.INCLUDE_PHANTOMS, IContainer.INCLUDE_TEAM_PRIVATE_MEMBERS, IContainer.INCLUDE_HIDDEN

      • getFlags

        int getFlags()
        Returns flags which describe in more detail how a resource has been affected.

        The following codes (bit masks) are used when kind is CHANGED, and also when the resource is involved in a move:

        • CONTENT - The bytes contained by the resource have been altered, or IResource.touch has been called on the resource.
        • DERIVED_CHANGED - The derived flag of the resource has been altered.
        • ENCODING - The encoding of the resource may have been altered. This flag is not set when the encoding changes due to the file being modified, or being moved.
        • DESCRIPTION - The description of the project has been altered, or IResource.touch has been called on the project. This flag is only valid for project resources.
        • OPEN - The project's open/closed state has changed. If it is not open, it was closed, and vice versa. This flag is only valid for project resources.
        • TYPE - The resource (a folder or file) has changed its type.
        • SYNC - The resource's sync status has changed.
        • MARKERS - The resource's markers have changed.
        • REPLACED - The resource (and all its properties) was deleted (either by a delete or move), and was subsequently re-created (either by a create, move, or copy).
        • LOCAL_CHANGED - The resource is a linked resource, and the underlying file system object has been added or removed.
        The following code is only used if kind is REMOVED (or CHANGED in conjunction with REPLACED):
        • MOVED_TO - The resource has moved. getMovedToPath will return the path of where it was moved to.
        The following code is only used if kind is ADDED (or CHANGED in conjunction with REPLACED):
        • MOVED_FROM - The resource has moved. getMovedFromPath will return the path of where it was moved from.
        The following code is only used when describing potential changes using an IResourceChangeDescriptionFactory:
        • COPIED_FROM - Change constant (bit mask) indicating that the resource was copied from another location. The location in the "before" state can be retrieved using getMovedFromPath().

        A simple move operation would result in the following delta information. If a resource is moved from A to B (with no other changes to A or B), then A will have kind REMOVED, with flag MOVED_TO, and getMovedToPath on A will return the path for B. B will have kind ADDED, with flag MOVED_FROM, and getMovedFromPath on B will return the path for A. B's other flags will describe any other changes to the resource, as compared to its previous location at A.

        Note that the move flags only describe the changes to a single resource; they don't necessarily imply anything about the parent or children of the resource. If the children were moved as a consequence of a subtree move operation, they will have corresponding move flags as well.

        Note that it is possible for a file resource to be replaced in the workspace by a folder resource (or the other way around). The resource delta, which is actually expressed in terms of paths instead or resources, shows this as a change to either the content or children.

        Returns:
        the flags
        See Also:
        CONTENT, DERIVED_CHANGED, DESCRIPTION, ENCODING, LOCAL_CHANGED, OPEN, MOVED_TO, MOVED_FROM, COPIED_FROM, TYPE, SYNC, MARKERS, REPLACED, getKind(), getMovedFromPath(), getMovedToPath(), IResource.move(IPath, int, IProgressMonitor)

      • getFullPath

        IPath getFullPath()
        Returns the full, absolute path of this resource delta.

        Note: the returned path never has a trailing separator.

        Returns:
        the full, absolute path of this resource delta
        See Also:
        IResource.getFullPath(), getProjectRelativePath()

      • getKind

        int getKind()
        Returns the kind of this resource delta. Normally, one of ADDED, REMOVED, CHANGED. When phantom resources have been explicitly requested, there are two additional kinds: ADDED_PHANTOM and REMOVED_PHANTOM.
        Returns:
        the kind of this resource delta
        See Also:
        ADDED, REMOVED, CHANGED, ADDED_PHANTOM, REMOVED_PHANTOM

      • getMarkerDeltas

        IMarkerDelta[] getMarkerDeltas()
        Returns the changes to markers on the corresponding resource. Returns an empty array if no markers changed.
        Returns:
        the marker deltas

      • getMovedFromPath

        IPath getMovedFromPath()
        Returns the full path (in the "before" state) from which this resource (in the "after" state) was moved. This value is only valid if the MOVED_FROM change flag is set; otherwise, null is returned.

        Note: the returned path never has a trailing separator.

        Returns:
        a path, or null
        See Also:
        getMovedToPath(), getFullPath(), getFlags()

      • getMovedToPath

        IPath getMovedToPath()
        Returns the full path (in the "after" state) to which this resource (in the "before" state) was moved. This value is only valid if the MOVED_TO change flag is set; otherwise, null is returned.

        Note: the returned path never has a trailing separator.

        Returns:
        a path, or null
        See Also:
        getMovedFromPath(), getFullPath(), getFlags()

      • getProjectRelativePath

        IPath getProjectRelativePath()
        Returns the project-relative path of this resource delta. Returns the empty path for projects and the workspace root.

        A resource's project-relative path indicates the route from the project to the resource. Within a workspace, there is exactly one such path for any given resource. The returned path never has a trailing separator.

        Returns:
        the project-relative path of this resource delta
        See Also:
        IResource.getProjectRelativePath(), getFullPath(), Path.EMPTY

      • getResource

        IResource getResource()
        Returns a handle for the affected resource.

        For additions (ADDED), this handle describes the newly-added resource; i.e., the one in the "after" state.

        For changes (CHANGED), this handle also describes the resource in the "after" state. When a file or folder resource has changed type, the former type of the handle can be inferred.

        For removals (REMOVED), this handle describes the resource in the "before" state. Even though this resource would not normally exist in the current workspace, the type of resource that was removed can be determined from the handle.

        For phantom additions and removals (ADDED_PHANTOM and REMOVED_PHANTOM), this is the handle of the phantom resource.

        Returns:
        the affected resource (handle)