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org.apache.jetspeed.layout
Interface PortletPlacementContext

public interface PortletPlacementContext

Handles portlet placement for client such as AJAX client side on a per request basis. The context is associated with a request context, thus it is only valid for the span of a request.

Version:

$Id: $

Author:

David Gurney, David Sean Taylor

Method Summary

Coordinate	add(Fragment fragment, Coordinate coordinate) Add a portlet to its managed page.
Fragment	getFragmentAtNewCoordinate(Coordinate coordinate) Retrieve a portlet fragment for the given coordinate.
Fragment	getFragmentAtOldCoordinate(Coordinate coordinate) Retrieve the old portlet fragment for the given coordinate (prior to placement).
Fragment	getFragmentById(String fragmentId) Retrieve a fragment by fragment id.
int	getNumberColumns() retrieve the number of columns for the managed layout.
int	getNumberRows(int column) retrieve the number of rows for the managed layout at the given column.
Coordinate	moveAbsolute(Fragment fragment, Coordinate coordinate) Move a portlet fragment to a new absolute position as specified in the Coordinate parameter.
Coordinate	moveAbsolute(Fragment fragment, Coordinate coordinate, boolean addFragment) Move a portlet fragment to a new absolute position as specified in the Coordinate parameter.
Coordinate	moveDown(Fragment fragment) Move a portlet relative to its current position DOWN one row.
Coordinate	moveLeft(Fragment fragment) Move a portlet relative to its current position LEFT one column.
Coordinate	moveRight(Fragment fragment) Move a portlet relative to its current position RIGHT one column.
Coordinate	moveUp(Fragment fragment) Move a portlet relative to its current position UP one row.
Coordinate	remove(Fragment fragment) Remove the specified fragment.
Page	syncPageFragments() Takes the internal portlet placement state and writes it back out to the root fragment for the managed page layout.

Method Detail

moveAbsolute

Coordinate moveAbsolute(Fragment fragment,
                        Coordinate coordinate)
                        throws PortletPlacementException

Move a portlet fragment to a new absolute position as specified in the Coordinate parameter.

Parameters:

fragment - The fragment to be moved.

coordinate - The specification of the new absolute coordinate

Returns:

new coordinate location of the portlet

Throws:

PortletPlacementException

moveAbsolute

Coordinate moveAbsolute(Fragment fragment,
                        Coordinate coordinate,
                        boolean addFragment)
                        throws PortletPlacementException

Move a portlet fragment to a new absolute position as specified in the Coordinate parameter.

Parameters:

fragment - The fragment to be moved.

coordinate - The specification of the new absolute coordinate

addFragment - When true, the fragment is being added (i.e. it is not being moved within the column)

Returns:

new coordinate location of the portlet

Throws:

PortletPlacementException

moveUp

Coordinate moveUp(Fragment fragment)
                  throws PortletPlacementException

Move a portlet relative to its current position UP one row.

Parameters:

fragment - The fragment to be moved.

Returns:

new coordinate location of the portlet

Throws:

PortletPlacementException

moveDown

Coordinate moveDown(Fragment fragment)
                    throws PortletPlacementException

Move a portlet relative to its current position DOWN one row.

Parameters:

fragment - The fragment to be moved.

Returns:

new coordinate location of the portlet

Throws:

PortletPlacementException

moveLeft

Coordinate moveLeft(Fragment fragment)
                    throws PortletPlacementException

Move a portlet relative to its current position LEFT one column.

Parameters:

fragment - The fragment to be moved.

Returns:

new coordinate location of the portlet

Throws:

PortletPlacementException

moveRight

Coordinate moveRight(Fragment fragment)
                     throws PortletPlacementException

Move a portlet relative to its current position RIGHT one column.

Parameters:

fragment - The fragment to be moved.

Returns:

new coordinate location of the portlet

Throws:

PortletPlacementException

add

Coordinate add(Fragment fragment,
               Coordinate coordinate)
               throws PortletPlacementException

Add a portlet to its managed page.

Parameters:

fragment - The Fragment to add

coordinate - The coordinate where to place the new portlet

Returns:

Throws:

PortletPlacementException

remove

Coordinate remove(Fragment fragment)
                  throws PortletPlacementException

Remove the specified fragment.

Parameters:

fragment -

Returns:

Throws:

PortletPlacementException

getNumberColumns

int getNumberColumns()
                     throws PortletPlacementException

retrieve the number of columns for the managed layout.

Returns:

the number of columns in the manged layout

Throws:

PortletPlacementException

getNumberRows

int getNumberRows(int column)
                  throws PortletPlacementException

retrieve the number of rows for the managed layout at the given column.

Parameters:

column - the column to retrieve the number of rows for

Returns:

the number of rows for the given column

Throws:

PortletPlacementException

getFragmentAtNewCoordinate

Fragment getFragmentAtNewCoordinate(Coordinate coordinate)
                                    throws PortletPlacementException

Retrieve a portlet fragment for the given coordinate.

Parameters:

coordinate - the coordinate associated to a fragment.

Returns:

the fragment associated to the given coordinate

Throws:

PortletPlacementException

getFragmentAtOldCoordinate

Fragment getFragmentAtOldCoordinate(Coordinate coordinate)
                                    throws PortletPlacementException

Retrieve the old portlet fragment for the given coordinate (prior to placement).

Parameters:

coordinate - the coordinate associated to a fragment.

Returns:

the fragment associated to the given coordinate

Throws:

PortletPlacementException

getFragmentById

Fragment getFragmentById(String fragmentId)
                         throws PortletPlacementException

Retrieve a fragment by fragment id.

Parameters:

fragmentId - a string key for a fragment managed on this layout.

Returns:

The fragment associated with the given fragment id.

Throws:

PortletPlacementException

syncPageFragments

Page syncPageFragments()

Takes the internal portlet placement state and writes it back out to the root fragment for the managed page layout.

Returns:

the managed page layout with updated fragment state.