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module com { module sun { module star { module ucb {
/** specifies actions which can be transported with content events.
< p >
The situations under which contents will send ContentEvents of the various
action types are described below . The description is broken into a list of
useful definitions , a list of events that happen to contents , and a list of
reactions taken by contents in response to those events .
< / p >
< p >
The definitions are as follows :
< / p >
< table border = 1 >
< tr > < td > D1 < / td > < td > A content C has an identifier id ( C ) . < / td > < / tr >
< tr > < td > D2 < / td > < td > A content C is in one of two states , Alive or Deleted .
< / td > < / tr >
< tr > < td > D3 < / td > < td > A folder content F has a set of children H ( F ) that is a
set of content identifiers . For example , an " open "
command will usually return a subset of the contents
denoted by H ( F ) . < / td > < / tr >
< / table >
< p >
The events that can happen to contents ( and that are of interest in this
context ) are listed next . Note that " event " here does not mean an
ContentEvent , but rather some event that occurs either because some content
processes a command , or because a content gets informed about a relevant
change in the underlying system it represents .
< / p >
< table border = 1 >
< tr > < td > E1 < / td > < td > The identifier of a content C changes from id1 ( C ) = = A
to id2 ( C ) = = B , denoted as E1 ( C : A - > B ) . For example ,
this event may occur when content C processes a
" setPropertyValues " command changing its " Title " property ,
or when a folder that hierarchically contains C changes
its identity . < / td > < / tr >
< tr > < td > E2 < / td > < td > The state of a content C changes from Alive to Deleted ,
denoted as E2 ( C ) . For example , this event may occur when
content C processes a " delete " command , or when a content
representing an IMAP message gets informed by the IMAP
server that the message has been deleted . < / td > < / tr >
< tr > < td > E3 < / td > < td > The set of children of a folder content F is enlarged by
some identifier A ( that was not previously in that set ,
i . e . , ! ( A in H1 ( F ) ) & & ( A in H2 ( F ) ) ) , denoted as E3 ( F , A ) .
For example , this event may occur when a new content
created at folder F processes its " insert " command , or
when a folder representing an IMAP mailbox gets informed
by the IMAP server that a new message has arrived at that
mailbox . < / td > < / tr >
< / table >
< p >
Finally , the list of reactions taken by contents in response to the above
events gives a description of what kinds of ContentEvents are sent in which
situations :
< / p >
< table border = 1 >
< tr > < td > R1 < / td > < td > E1 ( C : A - > B ) results in C sending an EXCHANGED
ContentEvent , which then results in the following : All
folders F that used to have A as a child , but will not
have B as a child , i . e . , ( A in H1 ( F ) ) & & ! ( B in H2 ( F ) ) ,
send a REMOVED ContentEvent . < / td > < / tr >
< tr > < td > R2 < / td > < td > E2 ( C ) results in C sending a DELETED ContentEvent ,
which then results in the following : All folders F that
used to have A as a child , but will not continue to have
A as a child , i . e . , ( A in H1 ( F ) ) & & ! ( A in H2 ( F ) ) , send
a REMOVED event . < / td > < / tr >
< tr > < td > R3 < / td > < td > E3 ( F , A ) results in F sending an INSERTED event . < / td > < / tr >
< / table >
*/
published constants ContentAction
{
/** A content was inserted into a folder content (i.e., while updating the
folder ) .
< p > This action must be notified at the listeners of the folder content .
*/
const long INSERTED = 0 ;
/** A content was removed from a folder content, but not physically
destroyed ( i . e . , due to rules just applied to the folder ) .
< p > This action must be notified at the listeners of the folder content .
*/
const long REMOVED = 1 ;
/** A content was physically destroyed.
< p > Events containing this action may be generated at any time . So a
content event listener should be prepared to get notified the " death "
of the related content !
< p > This action must be notified at the listeners of the deleted
content .
*/
const long DELETED = 2 ;
/** This Action indicates that a content has changed its identity (i.e.
after renaming a file system folder ) .
< p > This action must be notified at the listeners of the exchanged
content .
*/
const long EXCHANGED = 4 ;
/** This is obsolete and should no longer be used.
@ deprecated
*/
const long SEARCH_MATCHED = 128 ;
};
}; }; }; };
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