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## oracle.portal.provider.v2
Class DefaultPortletInstance

    java.lang.Object
      |
      +--oracle.portal.provider.v2.PortletInstance
            |
            +--oracle.portal.provider.v2.DefaultPortletInstance

public class DefaultPortletInstance
extends PortletInstance

`DefaultPortletInstance` is the default implementation of a `PortletInstance`, which carries out the responsibilities of a single 'instance' of a portlet on a single Portal page. A `DefaultPortletInstance` is driven by meta data information in a `DefaultPortletDefinition` and thus has the various portlet 'controller objects' at its disposal.

Constructor Summary
`DefaultPortletInstance()`

Method Summary
`void` | `copyTo(ProviderUser user, PortletInstance dest)` Called when the portlet instance is copied to another page.
`void` | `deregister(ProviderUser user)` Called when the portlet instance is removed from the page.
`java.lang.Object` | `getEditData(ProviderUser user, java.util.Locale locale, RenderContext rc)` Retrieves an object containing the customizable data for the given user in the given locale within the given context.
`java.lang.Object` | `getEditDefaultData(java.util.Locale locale, RenderContext rc)` Retrieves an object containing the default data for the `PortletInstance` in the given locale.
`boolean` | `hasAccess(ProviderUser user, java.util.Locale locale)` Verifies whether the user is authorized to use this particular portlet instance.
`void` | `init(ProviderInstance providerInstance, PortletDefinition portletDefinition, java.lang.String name, java.util.Locale defLocale)` Deprecated. Replaced by `init(ProviderInstance, PortletDefinition, String, Locale, PerfMonitor)`
`void` | `init(ProviderInstance providerInstance, PortletDefinition portletDefinition, java.lang.String name, java.util.Locale defLocale, PerfMonitor perfMonitor)` Initialize the portlet instance after construction.
`void` | `register(ProviderUser user)` Called when the portlet instance is first created on a page.
`void` | `render(ProviderUser user, java.util.Locale locale, RenderContext rc)` Renders a visual representation of this portlet instance for the given user in the given locale in the given context.
`void` | `submitEditData(ProviderUser user, java.util.Locale locale, RenderContext rc, java.lang.Object o)` Stores an object containing the customizable data for the given user in the given locale within the given context.

Methods inherited from class oracle.portal.provider.v2.PortletInstance
`getActionParameterName, getDefaultLocale, getInstanceName, getPortletDefinition, getPortletId, getPreferenceStore, getProviderId, getProviderInstance, getShortTitle, getTitle, hasTimeoutElapsed`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### DefaultPortletInstance

    public DefaultPortletInstance()

Method Detail

### init

    public void init(ProviderInstance providerInstance,
                     PortletDefinition portletDefinition,
                     java.lang.String name,
                     java.util.Locale defLocale)
              throws PortletException

  Deprecated. Replaced by `init(ProviderInstance, PortletDefinition, String, Locale, PerfMonitor)`

  Initialize the portlet instance after construction.

  Overrides:
    `init` in class `PortletInstance`
  Parameters:
    `providerInstance` - Provider of this instance
    `portletDefinition` - definition of this instance. This must be a `DefaultPortletDefinition`.
    `name` - Portal generated name of this instance
    `defLocale` - the default language/locale setting of the portal, if available, or `null` if the default locale defined on the `PortletDefinition` should be used.
  Throws:
    `PortletException` - if an error occurs during initialization.

### init

    public void init(ProviderInstance providerInstance,
                     PortletDefinition portletDefinition,
                     java.lang.String name,
                     java.util.Locale defLocale,
                     PerfMonitor perfMonitor)
              throws PortletException

  Initialize the portlet instance after construction.

  Overrides:
    `init` in class `PortletInstance`
  Parameters:
    `providerInstance` - Provider of this instance
    `portletDefinition` - definition of this instance. This must be a `DefaultPortletDefinition`.
    `name` - Portal generated name of this instance
    `defLocale` - the default language/locale setting of the portal, if available, or `null` if the default locale defined on the `PortletDefinition` should be used.
    `perfMonitor` - a performance monitor object used for tracking request progress
  Throws:
    `PortletException` - if an error occurs during initialization.

### register

    public void register(ProviderUser user)
                  throws java.io.IOException,
                         PortletAlreadyExistsException,
                         AccessControlException

  Called when the portlet instance is first created on a page. This gives the `DefaultPortletInstance` the opportunity to ask its `PortletPersonalizationManager` to initialize defaults for persisted customization data.

  Overrides:
    `register` in class `PortletInstance`
  Parameters:
    `user` - the user performing this operation.
  Throws:
    `java.io.IOException` - if an I/O error occurs whilst accessing persistent storage.
    `PortletAlreadyExistsException` - if this instance has already been registered.
    `AccessControlException` - if the given user isn't authorized to access this instance.

### deregister

    public void deregister(ProviderUser user)
                    throws java.io.IOException,
                           PortletNotFoundException,
                           AccessControlException

  Called when the portlet instance is removed from the page. This gives the `DefaultPortletInstance` the opportunity to ask its `PortletPersonalizationManager` to remove any persisted customization data.

  Overrides:
    `deregister` in class `PortletInstance`
  Parameters:
    `user` - the user performing this operation.
  Throws:
    `java.io.IOException` - if an I/O error occurs whilst accessing persistent storage.
    `PortletNotFoundException` - if this instance isn't known to exist in the Portal, i.e. hasn't been registered.
    `AccessControlException` - if the given user isn't authorized to access this instance.

### copyTo

    public void copyTo(ProviderUser user,
                       PortletInstance dest)
                throws java.io.IOException,
                       PortletNotFoundException,
                       AccessControlException

  Called when the portlet instance is copied to another page. This gives the `DefaultPortletInstance` the opportunity to ask its `PortletPersonalizationManager` to export defaults for persisted customization data to the new instance.

  Overrides:
    `copyTo` in class `PortletInstance`
  Parameters:
    `user` - the user performing this operation.
    `dest` - the `PortletInstance` to export data to.
  Throws:
    `java.io.IOException` - if an I/O error occurs whilst accessing persistent storage.
    `PortletNotFoundException` - if this instance or the destination instance isn't known to exist in the Portal, i.e. hasn't been registered.
    `AccessControlException` - if the given user isn't authorized to access this instance or the destination instance.

### hasAccess

    public boolean hasAccess(ProviderUser user,
                             java.util.Locale locale)
                      throws PortletNotFoundException

  Verifies whether the user is authorized to use this particular portlet instance. This implementation uses the portlet's `PortletSecurityManager` to verify access, if one is defined, or returns `true` otherwise.

  Overrides:
    `hasAccess` in class `PortletInstance`
  Parameters:
    `user` - the current user we are being asked to authorize.
    `locale` - the language setting with which the user has logged on to portal.
  Returns:
    `true` if the user is authorized to access this portlet instance.
  Throws:
    `PortletNotFoundException` - if this instance isn't known to exist in the Portal, i.e. hasn't been registered.

### getEditData

    public java.lang.Object getEditData(ProviderUser user,
                                        java.util.Locale locale,
                                        RenderContext rc)
                                 throws java.io.IOException,
                                        PortletNotFoundException,
                                        AccessControlException

  Retrieves an object containing the customizable data for the given user in the given locale within the given context. If the context is "Edit Defaults" mode, the data should correspond to the defaults for that locale, rather than the data for that specific user.

  This implementation first checks whether any customization data has been cached for this portlet instance during this request. If so, it returns it. Otherwise, if a `PortletPersonalizationManager` is defined for the portlet, it is used to retrieve a `PersonalizationObject`, which is returned and cached for the duration of this request. Otherwise, `null` is returned.

  Overrides:
    `getEditData` in class `PortletInstance`
  Parameters:
    `user` - the user for whom the data is being retrieved.
    `locale` - the language setting with which the user has logged on to portal.
    `rc` - an object describing the context in which this `PortletInstance` is being rendered.
  Returns:
    a `PersonalizationObject` containing the customizable data for the given user in the given locale within the given context, or `null` if none exists.
  Throws:
    `java.io.IOException` - if an I/O error occurs whilst retrieving the data
    `PortletNotFoundException` - if this instance isn't known to exist in the Portal, i.e. hasn't been registered.
    `AccessControlException` - if the given user isn't authorized to access this instance.

### getEditDefaultData

    public java.lang.Object getEditDefaultData(java.util.Locale locale,
                                               RenderContext rc)
                                        throws java.io.IOException,
                                               PortletNotFoundException,
                                               AccessControlException

  Retrieves an object containing the default data for the `PortletInstance` in the given locale. If any default data has been previously cached for this portlet instance during this request then it is returned. Otherwise, if a `PortletPersonalizationManager` is defined for the portlet, it is used to retrieve a `PersonalizationObject`, which is returned and cached for the duration of this request. Otherwise, `null` is returned.

  Overrides:
    `getEditDefaultData` in class `PortletInstance`
  Parameters:
    `locale` - the language setting with which the user has logged on to Portal.
    `rc` - an object describing the context in which this `PortletInstance` is being rendered.
  Returns:
    an object containing the default data for the `PortletInstance` in the given locale within the given context, or `null` if none exists.
  Throws:
    `java.io.IOException` - if an I/O error occurs whilst retrieving the data
    `PortletNotFoundException` - if this instance isn't known to exist in the Portal, i.e. hasn't been registered.
    `AccessControlException` - if the given user isn't authorized to access this instance.

### submitEditData

    public void submitEditData(ProviderUser user,
                               java.util.Locale locale,
                               RenderContext rc,
                               java.lang.Object o)
                        throws java.io.IOException,
                               AccessControlException

  Stores an object containing the customizable data for the given user in the given locale within the given context. If the context is "Edit Defaults" mode, the data should be stored as the defaults for that locale, rather than the data for that specific user.

  This implementation caches the given object for the duration of this request, and if a `PortletPersonalizationManager` is defined for the portlet, it is used to persist the data so that it is available for subsequent requests.

  Overrides:
    `submitEditData` in class `PortletInstance`
  Parameters:
    `user` - the user for whom the data is being stored.
    `locale` - the language setting with which the user has logged on to portal.
    `rc` - an object describing the context in which this `PortletInstance` is being rendered.
    `o` - an object containing the customizable data for the given user in the given locale within the given context. Should be a `PersonalizationObject`.
  Throws:
    `java.io.IOException` - if an I/O error occurs whilst retrieving the data
    `AccessControlException` - if the given user isn't authorized to access this instance.

### render

    public void render(ProviderUser user,
                       java.util.Locale locale,
                       RenderContext rc)
                throws AccessControlException,
                       PortletException

  Renders a visual representation of this portlet instance for the given user in the given locale in the given context. This implementation uses the portlet's `PortletRenderer` to perform the rendering.

  Specified by:
    `render` in class `PortletInstance`
  Parameters:
    `user` - the user for whom this `PortletInstance` is being rendered.
    `locale` - the language setting with which the user has logged on to portal.
    `rc` - an object describing the context in which this `PortletInstance` is being rendered.
  Throws:
    `AccessControlException` - if the given user isn't authorized to access this instance.
    `PortletException` - if a general portlet exception occurs whilst rendering.

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