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org.apache.jetspeed.portal.portlets
Class AbstractPortlet

java.lang.Object
  org.apache.jetspeed.portal.portlets.AbstractPortlet

All Implemented Interfaces:

Cacheable, Portlet, PortletState, org.apache.turbine.services.cache.Refreshable, java.io.Serializable

Direct Known Subclasses:

AbstractInstancePortlet, AbstractPortletControl, AggregatePortlet, ApplicationsPortlet, BadURLManagerPortlet, ClearPortlet, DaemonAdminPortlet, GlobalAdminPortlet, JavaRuntimePortlet, JetspeedContentAdmin, JetspeedPropertiesPortlet, LinkPortlet, PortletInfoPortlet, PreviewPortlet, ServletContextPortlet, ServletInvokerPortlet, ServletProxyPortlet, TurbineScreenPortlet, XMLPortlet

public abstract class AbstractPortlet

extends java.lang.Object

implements Portlet, PortletState, Cacheable, org.apache.turbine.services.cache.Refreshable

Should be used by most Portlets that wish to conform to default behavior

PERFORMANCE NOTE: getContent returns a StringElement that was generated on setContent(). This is used so that performance is increased since ECS does not have to work overtime to generate output.

Version:

$Id: AbstractPortlet.java,v 1.67 2005/04/02 17:31:08 jford Exp $

Author:

Kevin A. Burton, Raphaël Luta, Santiago Gala, Paul Spencer, Mark Orciuch

See Also:

Serialized Form

Field Summary

protected java.util.Hashtable

content Holds instances of ConcreteElements (Portlet output/content) based on its current CapabilityMap.

Fields inherited from interface org.apache.jetspeed.portal.Portlet

PORTLET_MAXIMIZED, PORTLET_MINIMIZED, PORTLET_NORMAL

Constructor Summary

AbstractPortlet()

Method Summary

boolean	allowClose(org.apache.turbine.util.RunData rundata) Implements the default close behavior: security permissions will be checked.
boolean	allowCustomize(org.apache.turbine.util.RunData rundata) Implements the default customize behavior: security permissions will be checked.
boolean	allowInfo(org.apache.turbine.util.RunData rundata) Implements the default info behavior: security permissions will be checked.
boolean	allowMaximize(org.apache.turbine.util.RunData rundata) Implements the default maximize behavior: security permissions will be checked.
boolean	allowMinimize(org.apache.turbine.util.RunData rundata) Implements the default info behavior: security permissions will be checked.
boolean	allowPrintFriendly(org.apache.turbine.util.RunData rundata) Implements the default print friendly format behavior: security permissions will be checked.
boolean	allowView(org.apache.turbine.util.RunData rundata) Implements the default view behavior: security permissions will be checked.
protected void	clearContent()
boolean	getAllowEdit(org.apache.turbine.util.RunData rundata) Is the portled editable/customizeable.
boolean	getAllowMaximize(org.apache.turbine.util.RunData rundata) Can this portlet be maximized
boolean	getAllowView(org.apache.turbine.util.RunData rundata) Is the portled viewable.
java.lang.String	getAttribute(java.lang.String attrName, java.lang.String attrDefValue, org.apache.turbine.util.RunData rundata) Retrieve a portlet attribute from persistent storage
org.apache.ecs.ConcreteElement	getContent(org.apache.turbine.util.RunData rundata) Returns an HTML representation of this portlet.
org.apache.ecs.ConcreteElement	getContent(org.apache.turbine.util.RunData rundata, CapabilityMap map)
org.apache.ecs.ConcreteElement	getContent(org.apache.turbine.util.RunData rundata, CapabilityMap map, boolean allowRecurse)
long	getCreationTime() Get the creation time for this Portlet
java.lang.String	getDescription() Provide a description within PML if the user has specified one.
java.lang.String	getDescription(java.lang.String instanceDescription) Provide a Description within PML if the user has specified one.
java.lang.Long	getExpirationMillis() Set the expiration time in milliseconds.
Expire	getExpire() Used by a Cacheable object to determine when it should expire itself from the cache.
java.lang.String	getHandle() Used by the cache to get a unique reference on what you want to add and then retrieve in the future from the cache
static java.lang.Object	getHandle(java.lang.Object config) Builds a new cache handle for this cacheable class with the specified config object.
java.lang.String	getID() Retrieve a unique portlet id
java.lang.String	getImage() Getter for property image.
java.lang.String	getImage(java.lang.String instanceImage) Getter for property image.
PortletInstance	getInstance(org.apache.turbine.util.RunData rundata) Gets the portlet instance associated with this portlet.
java.lang.String	getName() Get the portlet's name
PortletConfig	getPortletConfig() Get the config of this servlet
java.lang.String	getTitle() Provide a title within PML if the user has specified one.
java.lang.String	getTitle(java.lang.String instanceTitle) Provide a title within PML if the user has specified one.
void	init() By default don't provide any initialization
boolean	isCacheable() Is this portlet cacheable.
boolean	isClosed(org.apache.turbine.util.RunData rundata) Returns true if this portlet is currently closed
boolean	isMinimized(org.apache.turbine.util.RunData rundata) Returns true if this portlet is currently minimized
boolean	isShowTitleBar(org.apache.turbine.util.RunData rundata) Returns TRUE if the title bar in should be displayed.
boolean	providesCustomization()
void	refresh() Usually called by caching system when portlet is marked as expired, but has not be idle longer then TimeToLive.
void	setAttribute(java.lang.String attrName, java.lang.String attrValue, org.apache.turbine.util.RunData rundata) Stores a portlet attribute in persistent storage
void	setCacheable(boolean cacheable) Set cachable.
void	setCachedObject(org.apache.turbine.services.cache.CachedObject cachedObject) Set this portlet's cached object.
void	setClosed(boolean close, org.apache.turbine.util.RunData rundata) Toggles the portlet state between closed and normal
protected void	setContent(org.apache.ecs.ConcreteElement content)
protected void	setContent(org.apache.ecs.ConcreteElement content, CapabilityMap map)
protected void	setContent(java.lang.String content)
void	setCreationTime(long creationTime) Set the creation time for this Portlet
void	setDescription(java.lang.String description) Set the description for this Portlet
void	setExpirationMillis(long expirationMillis) Sets the cache expiration time.
void	setHandle(java.lang.String handle) Deprecated. cacheable classes should now implement a static getHandle(config) method
void	setID(java.lang.String id)
void	setImage(java.lang.String image) Setter for property image.
void	setMinimized(boolean minimize, org.apache.turbine.util.RunData rundata) Change the portlet visibility state ( minimized <-> normal )
void	setName(java.lang.String name) Set the name of the portlet
void	setPortletConfig(PortletConfig pc) Set's the configuration of this servlet.
void	setTitle(java.lang.String title) Set the title for this Portlet.
void	setTitle(java.lang.String title, org.apache.turbine.util.RunData rundata)
boolean	supportsType(MimeType mimeType) Returns true portlet is able to output content for given mimetype

Methods inherited from class java.lang.Object

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

Field Detail

content

protected java.util.Hashtable content

Holds instances of ConcreteElements (Portlet output/content) based on its current CapabilityMap.

Constructor Detail

AbstractPortlet

public AbstractPortlet()

Method Detail

clearContent

protected void clearContent()

setContent

protected void setContent(org.apache.ecs.ConcreteElement content)

setContent

protected void setContent(java.lang.String content)

setContent

protected void setContent(org.apache.ecs.ConcreteElement content,
                          CapabilityMap map)
                   throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

refresh

public void refresh()

Usually called by caching system when portlet is marked as expired, but has not be idle longer then TimeToLive. This method should be implement in cachable portlets

Specified by:

refresh in interface org.apache.turbine.services.cache.Refreshable

isCacheable

public boolean isCacheable()

Is this portlet cacheable. It is the portlet's responsability to cache the content.

Specified by:

isCacheable in interface Cacheable

Returns:

true Cachable
false Not cachable

setCacheable

public void setCacheable(boolean cacheable)

Set cachable. This should only be called in the portlet's init().

Specified by:

setCacheable in interface Cacheable

Parameters:

cacheable - true Portlet is cachable
false Portlet is NOT cachable

getExpire

public Expire getExpire()

Used by a Cacheable object to determine when it should expire itself from the cache.

Specified by:

getExpire in interface Cacheable

Returns:

Expire

getHandle

public final java.lang.String getHandle()

Used by the cache to get a unique reference on what you want to add and then retrieve in the future from the cache

Most implementations should just call the CacheHandleManager with the given params within the implementation and just return this.

Specified by:

getHandle in interface Cacheable

Returns:

Cache handle (key)

setHandle

public final void setHandle(java.lang.String handle)

Deprecated. cacheable classes should now implement a static getHandle(config) method

Used by a Cacheable object to determine when it should expire itself from the cache.

Specified by:

setHandle in interface Cacheable

Parameters:

handle - Cache Handle

getExpirationMillis

public java.lang.Long getExpirationMillis()

Set the expiration time in milliseconds.

Specified by:

getExpirationMillis in interface Cacheable

Returns:

Expiration time in milliseconds since epoch, or null if the expiration was not set.

setExpirationMillis

public void setExpirationMillis(long expirationMillis)

Sets the cache expiration time. When the portlet is stale (expired), the refresh() will be called if the portlet has not been untouched longer then then it's TimeToLive.

Specified by:

setExpirationMillis in interface Cacheable

Parameters:

expirationMillis - setExpirationMillis Expiration in milliseconds since epoch

getHandle

public static java.lang.Object getHandle(java.lang.Object config)

Builds a new cache handle for this cacheable class with the specified config object.

Parameters:

config - The configuration object to use for building the handle

Returns:

A cache handle

setCachedObject

public void setCachedObject(org.apache.turbine.services.cache.CachedObject cachedObject)

Set this portlet's cached object.

Specified by:

setCachedObject in interface Cacheable

Parameters:

cachedObject - Cached Object associated to this portlet

getName

public java.lang.String getName()

Get the portlet's name

Specified by:

getName in interface Portlet

Returns:

Name of the portlet

setName

public void setName(java.lang.String name)

Set the name of the portlet

Specified by:

setName in interface Portlet

Parameters:

name - Name of the portlet

See Also:

Portlet.getName()

getPortletConfig

public PortletConfig getPortletConfig()

Get the config of this servlet

Specified by:

getPortletConfig in interface Portlet

Returns:

PortletConfig Portlet

setPortletConfig

public void setPortletConfig(PortletConfig pc)

Set's the configuration of this servlet.

Specified by:

setPortletConfig in interface Portlet

getContent

public org.apache.ecs.ConcreteElement getContent(org.apache.turbine.util.RunData rundata)

Description copied from interface: Portlet

Returns an HTML representation of this portlet. Usually a Portlet would initialized itself within init() and then when getContent is called it would return its presentation.

Specified by:

getContent in interface Portlet

Parameters:

rundata - The RunData object for the current request

getContent

public org.apache.ecs.ConcreteElement getContent(org.apache.turbine.util.RunData rundata,
                                                 CapabilityMap map)

getContent

public org.apache.ecs.ConcreteElement getContent(org.apache.turbine.util.RunData rundata,
                                                 CapabilityMap map,
                                                 boolean allowRecurse)

Parameters:

rundata - The RunData object for the current request

getDescription

public java.lang.String getDescription()

Provide a description within PML if the user has specified one.

Specified by:

getDescription in interface Portlet

Returns:

a null entry if the user hasn't defined anything

getDescription

public java.lang.String getDescription(java.lang.String instanceDescription)

Provide a Description within PML if the user has specified one.

Specified by:

getDescription in interface Portlet

Parameters:

instanceDescription - Description from PSML

Returns:

a null if entry AND portlet have not defined a description

setDescription

public void setDescription(java.lang.String description)

Description copied from interface: Portlet

Set the description for this Portlet

Specified by:

setDescription in interface Portlet

getTitle

public java.lang.String getTitle()

Provide a title within PML if the user has specified one.

Specified by:

getTitle in interface Portlet

Returns:

a null entry if the user hasn't defined anything

getTitle

public java.lang.String getTitle(java.lang.String instanceTitle)

Provide a title within PML if the user has specified one.

Specified by:

getTitle in interface Portlet

Parameters:

instanceTitle - Title from PSML

Returns:

a null if entry AND portlet have not defined a title

setTitle

public void setTitle(java.lang.String title)

Set the title for this Portlet.

Specified by:

setTitle in interface Portlet

Parameters:

title - Portlet title.

setTitle

public void setTitle(java.lang.String title,
                     org.apache.turbine.util.RunData rundata)

Specified by:

setTitle in interface Portlet

getImage

public java.lang.String getImage()

Getter for property image.

Returns:

Name of portlet image, icon. The name is expected to be in the form of a URL.

getImage

public java.lang.String getImage(java.lang.String instanceImage)

Getter for property image.

Specified by:

getImage in interface Portlet

Returns:

a null if entry AND portlet have not defined an icon.

setImage

public void setImage(java.lang.String image)

Description copied from interface: Portlet

Setter for property image.

Specified by:

setImage in interface Portlet

getAllowEdit

public boolean getAllowEdit(org.apache.turbine.util.RunData rundata)

Is the portled editable/customizeable.

Specified by:

getAllowEdit in interface Portlet

Parameters:

rundata - The RunData object for the current request

Returns:

true Editing is allow false Editing is NOT alowed

getAllowView

public boolean getAllowView(org.apache.turbine.util.RunData rundata)

Is the portled viewable.

Specified by:

getAllowView in interface Portlet

Parameters:

rundata - The RunData object for the current request

Returns:

true Viewing is allow false Viewing is NOT alowed Override this method to control your own View behavior

getAllowMaximize

public boolean getAllowMaximize(org.apache.turbine.util.RunData rundata)

Can this portlet be maximized

Specified by:

getAllowMaximize in interface Portlet

Parameters:

rundata - The RunData object for the current request

Returns:

true Portlet can be maximized
false Portlet can NOT be maximized

init

public void init()
          throws PortletException

By default don't provide any initialization

Specified by:

init in interface Portlet

Throws:

PortletException

getCreationTime

public long getCreationTime()

Description copied from interface: Portlet

Get the creation time for this Portlet

Specified by:

getCreationTime in interface Portlet

setCreationTime

public void setCreationTime(long creationTime)

Description copied from interface: Portlet

Set the creation time for this Portlet

Specified by:

setCreationTime in interface Portlet

supportsType

public boolean supportsType(MimeType mimeType)

Description copied from interface: Portlet

Returns true portlet is able to output content for given mimetype

Specified by:

supportsType in interface Portlet

allowClose

public boolean allowClose(org.apache.turbine.util.RunData rundata)

Implements the default close behavior: security permissions will be checked.

Specified by:

allowClose in interface PortletState

Parameters:

rundata - The RunData object for the current request

isClosed

public boolean isClosed(org.apache.turbine.util.RunData rundata)

Returns true if this portlet is currently closed

Specified by:

isClosed in interface PortletState

Parameters:

rundata - The RunData object for the current request

setClosed

public void setClosed(boolean close,
                      org.apache.turbine.util.RunData rundata)

Toggles the portlet state between closed and normal

Specified by:

setClosed in interface PortletState

Parameters:

rundata - The RunData object for the current request

allowInfo

public boolean allowInfo(org.apache.turbine.util.RunData rundata)

Implements the default info behavior: security permissions will be checked.

Specified by:

allowInfo in interface PortletState

Parameters:

rundata - The RunData object for the current request

allowCustomize

public boolean allowCustomize(org.apache.turbine.util.RunData rundata)

Implements the default customize behavior: security permissions will be checked.

Specified by:

allowCustomize in interface PortletState

Parameters:

rundata - The RunData object for the current request

allowMaximize

public boolean allowMaximize(org.apache.turbine.util.RunData rundata)

Implements the default maximize behavior: security permissions will be checked.

Specified by:

allowMaximize in interface PortletState

Parameters:

rundata - The RunData object for the current request

allowMinimize

public boolean allowMinimize(org.apache.turbine.util.RunData rundata)

Implements the default info behavior: security permissions will be checked.

Specified by:

allowMinimize in interface PortletState

Parameters:

rundata - The RunData object for the current request

allowView

public boolean allowView(org.apache.turbine.util.RunData rundata)

Implements the default view behavior: security permissions will be checked.

Parameters:

rundata - The RunData object for the current request

allowPrintFriendly

public boolean allowPrintFriendly(org.apache.turbine.util.RunData rundata)

Implements the default print friendly format behavior: security permissions will be checked.

Specified by:

allowPrintFriendly in interface PortletState

Parameters:

rundata - The RunData object for the current request

isMinimized

public boolean isMinimized(org.apache.turbine.util.RunData rundata)

Returns true if this portlet is currently minimized

Specified by:

isMinimized in interface PortletState

Parameters:

rundata - The RunData object for the current request

setMinimized

public void setMinimized(boolean minimize,
                         org.apache.turbine.util.RunData rundata)

Change the portlet visibility state ( minimized <-> normal )

Specified by:

setMinimized in interface PortletState

Parameters:

minimize - True if the portlet change to minimized

rundata - The RunData object for the current request

isShowTitleBar

public boolean isShowTitleBar(org.apache.turbine.util.RunData rundata)

Returns TRUE if the title bar in should be displayed. The title bar includes the portlet title and action buttons. This

Specified by:

isShowTitleBar in interface Portlet

Parameters:

rundata - The RunData object for the current request

getAttribute

public java.lang.String getAttribute(java.lang.String attrName,
                                     java.lang.String attrDefValue,
                                     org.apache.turbine.util.RunData rundata)

Retrieve a portlet attribute from persistent storage

Specified by:

getAttribute in interface Portlet

Parameters:

attrName - The attribute to retrieve

attrDefValue - The value if the attr doesn't exists

rundata - The RunData object for the current request

Returns:

The attribute value

setAttribute

public void setAttribute(java.lang.String attrName,
                         java.lang.String attrValue,
                         org.apache.turbine.util.RunData rundata)

Stores a portlet attribute in persistent storage

Specified by:

setAttribute in interface Portlet

Parameters:

attrName - The attribute to retrieve

rundata - The RunData object for the current request

getInstance

public PortletInstance getInstance(org.apache.turbine.util.RunData rundata)

Gets the portlet instance associated with this portlet.

Specified by:

getInstance in interface Portlet

Parameters:

rundata - The RunData object for the current request

Returns:

PortletInstance

getID

public java.lang.String getID()

Description copied from interface: Portlet

Retrieve a unique portlet id

Specified by:

getID in interface Portlet

setID

public void setID(java.lang.String id)

Specified by:

setID in interface Portlet

providesCustomization

public boolean providesCustomization()

Specified by:

providesCustomization in interface Portlet

Returns:

true if the portlet does its own customization