Class Folder
- java.lang.Object
-
- jakarta.mail.Folder
-
- All Implemented Interfaces:
AutoCloseable
public abstract class Folder extends Object implements AutoCloseable
Folder is an abstract class that represents a folder for mail messages. Subclasses implement protocol specific Folders.Folders can contain Messages, other Folders or both, thus providing a tree-like hierarchy rooted at the Store's default folder. (Note that some Folder implementations may not allow both Messages and other Folders in the same Folder).
The interpretation of folder names is implementation dependent. The different levels of hierarchy in a folder's full name are separated from each other by the hierarchy delimiter character.
The case-insensitive full folder name (that is, the full name relative to the default folder for a Store) INBOX is reserved to mean the "primary folder for this user on this server". Not all Stores will provide an INBOX folder, and not all users will have an INBOX folder at all times. The name INBOX is reserved to refer to this folder, when it exists, in Stores that provide it.
A Folder object obtained from a Store need not actually exist in the backend store. The
exists
method tests whether the folder exists or not. Thecreate
method creates a Folder.A Folder is initially in the closed state. Certain methods are valid in this state; the documentation for those methods note this. A Folder is opened by calling its 'open' method. All Folder methods, except
open
,delete
andrenameTo
, are valid in this state.The only way to get a Folder is by invoking the
getFolder
method on Store, Folder, or Session, or by invoking thelist
orlistSubscribed
methods on Folder. Folder objects returned by the above methods are not cached by the Store. Thus, invoking thegetFolder
method with the same folder name multiple times will return distinct Folder objects. Likewise for thelist
andlistSubscribed
methods.The Message objects within the Folder are cached by the Folder. Thus, invoking
getMessage(msgno)
on the same message number multiple times will return the same Message object, until an expunge is done on this Folder.Message objects from a Folder are only valid while a Folder is open and should not be accessed after the Folder is closed, even if the Folder is subsequently reopened. Instead, new Message objects must be fetched from the Folder after the Folder is reopened.
Note that a Message's message number can change within a session if the containing Folder is expunged using the expunge method. Clients that use message numbers as references to messages should be aware of this and should be prepared to deal with this situation (probably by flushing out existing message number references and reloading them). Because of this complexity, it is better for clients to use Message objects as references to messages, rather than message numbers. Expunged Message objects still have to be pruned, but other Message objects in that folder are not affected by the expunge.
- Author:
- John Mani, Bill Shannon
-
-
Field Summary
Fields Modifier and Type Field Description static int
HOLDS_FOLDERS
This folder can contain other foldersstatic int
HOLDS_MESSAGES
This folder can contain messagesprotected int
mode
The open mode of this folder.static int
READ_ONLY
The Folder is read only.static int
READ_WRITE
The state and contents of this folder can be modified.protected Store
store
The parent store.
-
Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description void
addConnectionListener(ConnectionListener l)
Add a listener for Connection events on this Folder.void
addFolderListener(FolderListener l)
Add a listener for Folder events on this Folder.void
addMessageChangedListener(MessageChangedListener l)
Add a listener for MessageChanged events on this Folder.void
addMessageCountListener(MessageCountListener l)
Add a listener for MessageCount events on this Folder.abstract void
appendMessages(Message[] msgs)
Append given Messages to this folder.void
close()
Close this Folder and expunge deleted messages.abstract void
close(boolean expunge)
Close this Folder.void
copyMessages(Message[] msgs, Folder folder)
Copy the specified Messages from this Folder into another Folder.abstract boolean
create(int type)
Create this folder on the Store.abstract boolean
delete(boolean recurse)
Delete this Folder.abstract boolean
exists()
Tests if this folder physically exists on the Store.abstract Message[]
expunge()
Expunge (permanently remove) messages marked DELETED.void
fetch(Message[] msgs, FetchProfile fp)
Prefetch the items specified in the FetchProfile for the given Messages.protected void
finalize()
int
getDeletedMessageCount()
Get the number of deleted messages in this Folder.abstract Folder
getFolder(String name)
Return the Folder object corresponding to the given name.abstract String
getFullName()
Returns the full name of this Folder.abstract Message
getMessage(int msgnum)
Get the Message object corresponding to the given message number.abstract int
getMessageCount()
Get total number of messages in this Folder.Message[]
getMessages()
Get all Message objects from this Folder.Message[]
getMessages(int[] msgnums)
Get the Message objects for message numbers specified in the array.Message[]
getMessages(int start, int end)
Get the Message objects for message numbers ranging from start through end, both start and end inclusive.int
getMode()
Return the open mode of this folder.abstract String
getName()
Returns the name of this Folder.int
getNewMessageCount()
Get the number of new messages in this Folder.abstract Folder
getParent()
Returns the parent folder of this folder.abstract Flags
getPermanentFlags()
Get the permanent flags supported by this Folder.abstract char
getSeparator()
Return the delimiter character that separates this Folder's pathname from the names of immediate subfolders.Store
getStore()
Returns the Store that owns this Folder object.abstract int
getType()
Returns the type of this Folder, that is, whether this folder can hold messages or subfolders or both.int
getUnreadMessageCount()
Get the total number of unread messages in this Folder.URLName
getURLName()
Return a URLName representing this folder.abstract boolean
hasNewMessages()
Returns true if this Folder has new messages since the last time this indication was reset.abstract boolean
isOpen()
Indicates whether this Folder is in the 'open' state.boolean
isSubscribed()
Returns true if this Folder is subscribed.Folder[]
list()
Convenience method that returns the list of folders under this Folder.abstract Folder[]
list(String pattern)
Returns a list of Folders belonging to this Folder's namespace that match the specified pattern.Folder[]
listSubscribed()
Convenience method that returns the list of subscribed folders under this Folder.Folder[]
listSubscribed(String pattern)
Returns a list of subscribed Folders belonging to this Folder's namespace that match the specified pattern.protected void
notifyConnectionListeners(int type)
Notify all ConnectionListeners.protected void
notifyFolderListeners(int type)
Notify all FolderListeners registered on this Folder and this folder's Store.protected void
notifyFolderRenamedListeners(Folder folder)
Notify all FolderListeners registered on this Folder and this folder's Store about the renaming of this folder.protected void
notifyMessageAddedListeners(Message[] msgs)
Notify all MessageCountListeners about the addition of messages into this folder.protected void
notifyMessageChangedListeners(int type, Message msg)
Notify all MessageChangedListeners.protected void
notifyMessageRemovedListeners(boolean removed, Message[] msgs)
Notify all MessageCountListeners about the removal of messages from this Folder.abstract void
open(int mode)
Open this Folder.void
removeConnectionListener(ConnectionListener l)
Remove a Connection event listener.void
removeFolderListener(FolderListener l)
Remove a Folder event listener.void
removeMessageChangedListener(MessageChangedListener l)
Remove a MessageChanged listener.void
removeMessageCountListener(MessageCountListener l)
Remove a MessageCount listener.abstract boolean
renameTo(Folder f)
Rename this Folder.Message[]
search(SearchTerm term)
Search this Folder for messages matching the specified search criterion.Message[]
search(SearchTerm term, Message[] msgs)
Search the given array of messages for those that match the specified search criterion.void
setFlags(int[] msgnums, Flags flag, boolean value)
Set the specified flags on the messages whose message numbers are in the array.void
setFlags(int start, int end, Flags flag, boolean value)
Set the specified flags on the messages numbered from start through end, both start and end inclusive.void
setFlags(Message[] msgs, Flags flag, boolean value)
Set the specified flags on the messages specified in the array.void
setSubscribed(boolean subscribe)
Subscribe or unsubscribe this Folder.String
toString()
override the default toString(), it will return the String from Folder.getFullName() or if that is null, it will use the default toString() behavior.
-
-
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Field Detail
-
store
protected Store store
The parent store.
-
mode
protected int mode
The open mode of this folder. The open mode isFolder.READ_ONLY
,Folder.READ_WRITE
, or -1 if not known.- Since:
- JavaMail 1.1
-
HOLDS_MESSAGES
public static final int HOLDS_MESSAGES
This folder can contain messages- See Also:
- Constant Field Values
-
HOLDS_FOLDERS
public static final int HOLDS_FOLDERS
This folder can contain other folders- See Also:
- Constant Field Values
-
READ_ONLY
public static final int READ_ONLY
The Folder is read only. The state and contents of this folder cannot be modified.- See Also:
- Constant Field Values
-
READ_WRITE
public static final int READ_WRITE
The state and contents of this folder can be modified.- See Also:
- Constant Field Values
-
-
Constructor Detail
-
Folder
protected Folder(Store store)
Constructor that takes a Store object.- Parameters:
store
- the Store that holds this folder
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Method Detail
-
getName
public abstract String getName()
Returns the name of this Folder.This method can be invoked on a closed Folder.
- Returns:
- name of the Folder
-
getFullName
public abstract String getFullName()
Returns the full name of this Folder. If the folder resides under the root hierarchy of this Store, the returned name is relative to the root. Otherwise an absolute name, starting with the hierarchy delimiter, is returned.This method can be invoked on a closed Folder.
- Returns:
- full name of the Folder
-
getURLName
public URLName getURLName() throws MessagingException
Return a URLName representing this folder. The returned URLName does not include the password used to access the store.- Returns:
- the URLName representing this folder
- Throws:
MessagingException
- for failures- Since:
- JavaMail 1.1
- See Also:
URLName
-
getStore
public Store getStore()
Returns the Store that owns this Folder object. This method can be invoked on a closed Folder.- Returns:
- the Store
-
getParent
public abstract Folder getParent() throws MessagingException
Returns the parent folder of this folder. This method can be invoked on a closed Folder. If this folder is the top of a folder hierarchy, this method returns null.Note that since Folder objects are not cached, invoking this method returns a new distinct Folder object.
- Returns:
- Parent folder
- Throws:
MessagingException
- for failures
-
exists
public abstract boolean exists() throws MessagingException
Tests if this folder physically exists on the Store. This method can be invoked on a closed Folder.- Returns:
- true if the folder exists, otherwise false
- Throws:
MessagingException
- typically if the connection to the server is lost.- See Also:
create(int)
-
list
public abstract Folder[] list(String pattern) throws MessagingException
Returns a list of Folders belonging to this Folder's namespace that match the specified pattern. Patterns may contain the wildcard characters"%"
, which matches any character except hierarchy delimiters, and"*"
, which matches any character.As an example, given the folder hierarchy:
Personal/ Finance/ Stocks Bonus StockOptions Jokes
list("*")
on "Personal" will return the whole hierarchy.
list("%")
on "Personal" will return "Finance" and "Jokes".
list("Jokes")
on "Personal" will return "Jokes".
list("Stock*")
on "Finance" will return "Stocks" and "StockOptions".Folder objects are not cached by the Store, so invoking this method on the same pattern multiple times will return that many distinct Folder objects.
This method can be invoked on a closed Folder.
- Parameters:
pattern
- the match pattern- Returns:
- array of matching Folder objects. An empty array is returned if no matching Folders exist.
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- for other failures- See Also:
listSubscribed(java.lang.String)
-
listSubscribed
public Folder[] listSubscribed(String pattern) throws MessagingException
Returns a list of subscribed Folders belonging to this Folder's namespace that match the specified pattern. If the folder does not support subscription, this method should resolve tolist
. (The default implementation provided here, does just this). The pattern can contain wildcards as forlist
.Note that, at a given level of the folder hierarchy, a particular folder may not be subscribed, but folders underneath that folder in the folder hierarchy may be subscribed. In order to allow walking the folder hierarchy, such unsubscribed folders may be returned, indicating that a folder lower in the hierarchy is subscribed. The
isSubscribed
method on a folder will tell whether any particular folder is actually subscribed.Folder objects are not cached by the Store, so invoking this method on the same pattern multiple times will return that many distinct Folder objects.
This method can be invoked on a closed Folder.
- Parameters:
pattern
- the match pattern- Returns:
- array of matching subscribed Folder objects. An empty array is returned if no matching subscribed folders exist.
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- for other failures- See Also:
list(java.lang.String)
-
list
public Folder[] list() throws MessagingException
Convenience method that returns the list of folders under this Folder. This method just calls thelist(String pattern)
method with"%"
as the match pattern. This method can be invoked on a closed Folder.- Returns:
- array of Folder objects under this Folder. An empty array is returned if no subfolders exist.
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- for other failures- See Also:
list(java.lang.String)
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listSubscribed
public Folder[] listSubscribed() throws MessagingException
Convenience method that returns the list of subscribed folders under this Folder. This method just calls thelistSubscribed(String pattern)
method with"%"
as the match pattern. This method can be invoked on a closed Folder.- Returns:
- array of subscribed Folder objects under this Folder. An empty array is returned if no subscribed subfolders exist.
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- for other failures- See Also:
listSubscribed(java.lang.String)
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getSeparator
public abstract char getSeparator() throws MessagingException
Return the delimiter character that separates this Folder's pathname from the names of immediate subfolders. This method can be invoked on a closed Folder.- Returns:
- Hierarchy separator character
- Throws:
FolderNotFoundException
- if the implementation requires the folder to exist, but it does notMessagingException
-
getType
public abstract int getType() throws MessagingException
Returns the type of this Folder, that is, whether this folder can hold messages or subfolders or both. The returned value is an integer bitfield with the appropriate bits set. This method can be invoked on a closed folder.- Returns:
- integer with appropriate bits set
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- See Also:
HOLDS_FOLDERS
,HOLDS_MESSAGES
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create
public abstract boolean create(int type) throws MessagingException
Create this folder on the Store. When this folder is created, any folders in its path that do not exist are also created.If the creation is successful, a CREATED FolderEvent is delivered to any FolderListeners registered on this Folder and this Store.
- Parameters:
type
- The type of this folder.- Returns:
- true if the creation succeeds, else false.
- Throws:
MessagingException
- for failures- See Also:
HOLDS_FOLDERS
,HOLDS_MESSAGES
,FolderEvent
-
isSubscribed
public boolean isSubscribed()
Returns true if this Folder is subscribed.This method can be invoked on a closed Folder.
The default implementation provided here just returns true.
- Returns:
- true if this Folder is subscribed
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setSubscribed
public void setSubscribed(boolean subscribe) throws MessagingException
Subscribe or unsubscribe this Folder. Not all Stores support subscription.This method can be invoked on a closed Folder.
The implementation provided here just throws the MethodNotSupportedException.
- Parameters:
subscribe
- true to subscribe, false to unsubscribe- Throws:
FolderNotFoundException
- if this folder does not exist.MethodNotSupportedException
- if this store does not support subscriptionMessagingException
- for other failures
-
hasNewMessages
public abstract boolean hasNewMessages() throws MessagingException
Returns true if this Folder has new messages since the last time this indication was reset. When this indication is set or reset depends on the Folder implementation (and in the case of IMAP, depends on the server). This method can be used to implement a lightweight "check for new mail" operation on a Folder without opening it. (For example, a thread that monitors a mailbox and flags when it has new mail.) This method should indicate whether any messages in the Folder have theRECENT
flag set.Note that this is not an incremental check for new mail, i.e., it cannot be used to determine whether any new messages have arrived since the last time this method was invoked. To implement incremental checks, the Folder needs to be opened.
This method can be invoked on a closed Folder that can contain Messages.
- Returns:
- true if the Store has new Messages
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- for other failures
-
getFolder
public abstract Folder getFolder(String name) throws MessagingException
Return the Folder object corresponding to the given name. Note that this folder does not physically have to exist in the Store. Theexists()
method on a Folder indicates whether it really exists on the Store.In some Stores, name can be an absolute path if it starts with the hierarchy delimiter. Otherwise, it is interpreted relative to this Folder.
Folder objects are not cached by the Store, so invoking this method on the same name multiple times will return that many distinct Folder objects.
This method can be invoked on a closed Folder.
- Parameters:
name
- name of the Folder- Returns:
- Folder object
- Throws:
MessagingException
- for failures
-
delete
public abstract boolean delete(boolean recurse) throws MessagingException
Delete this Folder. This method will succeed only on a closed Folder.The
recurse
flag controls whether the deletion affects subfolders or not. If true, all subfolders are deleted, then this folder itself is deleted. If false, the behaviour is dependent on the folder type and is elaborated below:-
The folder can contain only messages: (type == HOLDS_MESSAGES).
All messages within the folder are removed. The folder itself is then removed. An appropriate FolderEvent is generated by the Store and this folder. -
The folder can contain only subfolders: (type == HOLDS_FOLDERS).
If this folder is empty (does not contain any subfolders at all), it is removed. An appropriate FolderEvent is generated by the Store and this folder.
If this folder contains any subfolders, the delete fails and returns false. -
The folder can contain subfolders as well as messages:
If the folder is empty (no messages or subfolders), it is removed. If the folder contains no subfolders, but only messages, then all messages are removed. The folder itself is then removed. In both the above cases, an appropriate FolderEvent is generated by the Store and this folder.If the folder contains subfolders there are 3 possible choices an implementation is free to do:
- The operation fails, irrespective of whether this folder contains messages or not. Some implementations might elect to go with this simple approach. The delete() method returns false.
- Any messages within the folder are removed. Subfolders
are not removed. The folder itself is not removed or affected
in any manner. The delete() method returns true. And the
exists() method on this folder will return true indicating that
this folder still exists.
An appropriate FolderEvent is generated by the Store and this folder. - Any messages within the folder are removed. Subfolders are
not removed. The folder itself changes its type from
HOLDS_FOLDERS | HOLDS_MESSAGES to HOLDS_FOLDERS. Thus new
messages cannot be added to this folder, but new subfolders can
be created underneath. The delete() method returns true indicating
success. The exists() method on this folder will return true
indicating that this folder still exists.
An appropriate FolderEvent is generated by the Store and this folder.
- Parameters:
recurse
- also delete subfolders?- Returns:
- true if the Folder is deleted successfully
- Throws:
FolderNotFoundException
- if this folder does not existIllegalStateException
- if this folder is not in the closed state.MessagingException
- for other failures- See Also:
FolderEvent
-
The folder can contain only messages: (type == HOLDS_MESSAGES).
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renameTo
public abstract boolean renameTo(Folder f) throws MessagingException
Rename this Folder. This method will succeed only on a closed Folder.If the rename is successful, a RENAMED FolderEvent is delivered to FolderListeners registered on this folder and its containing Store.
- Parameters:
f
- a folder representing the new name for this Folder- Returns:
- true if the Folder is renamed successfully
- Throws:
FolderNotFoundException
- if this folder does not existIllegalStateException
- if this folder is not in the closed state.MessagingException
- for other failures- See Also:
FolderEvent
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open
public abstract void open(int mode) throws MessagingException
Open this Folder. This method is valid only on Folders that can contain Messages and that are closed.If this folder is opened successfully, an OPENED ConnectionEvent is delivered to any ConnectionListeners registered on this Folder.
The effect of opening multiple connections to the same folder on a specifc Store is implementation dependent. Some implementations allow multiple readers, but only one writer. Others allow multiple writers as well as readers.
- Parameters:
mode
- open the Folder READ_ONLY or READ_WRITE- Throws:
FolderNotFoundException
- if this folder does not exist.IllegalStateException
- if this folder is not in the closed state.MessagingException
- for other failures- See Also:
READ_ONLY
,READ_WRITE
,getType()
,ConnectionEvent
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close
public abstract void close(boolean expunge) throws MessagingException
Close this Folder. This method is valid only on open Folders.A CLOSED ConnectionEvent is delivered to any ConnectionListeners registered on this Folder. Note that the folder is closed even if this method terminates abnormally by throwing a MessagingException.
- Parameters:
expunge
- expunges all deleted messages if this flag is true- Throws:
IllegalStateException
- if this folder is not openedMessagingException
- for other failures- See Also:
ConnectionEvent
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close
public void close() throws MessagingException
Close this Folder and expunge deleted messages.A CLOSED ConnectionEvent is delivered to any ConnectionListeners registered on this Folder. Note that the folder is closed even if this method terminates abnormally by throwing a MessagingException.
This method supports the
AutoCloseable
interface.This implementation calls
close(true)
.- Specified by:
close
in interfaceAutoCloseable
- Throws:
IllegalStateException
- if this folder is not openedMessagingException
- for other failures- Since:
- JavaMail 1.6
- See Also:
ConnectionEvent
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isOpen
public abstract boolean isOpen()
Indicates whether this Folder is in the 'open' state.- Returns:
- true if this Folder is in the 'open' state.
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getMode
public int getMode()
Return the open mode of this folder. ReturnsFolder.READ_ONLY
,Folder.READ_WRITE
, or -1 if the open mode is not known (usually only because an olderFolder
provider has not been updated to use this new method).- Returns:
- the open mode of this folder
- Throws:
IllegalStateException
- if this folder is not opened- Since:
- JavaMail 1.1
-
getPermanentFlags
public abstract Flags getPermanentFlags()
Get the permanent flags supported by this Folder. Returns a Flags object that contains all the flags supported.The special flag
Flags.Flag.USER
indicates that this Folder supports arbitrary user-defined flags.The supported permanent flags for a folder may not be available until the folder is opened.
- Returns:
- permanent flags, or null if not known
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getMessageCount
public abstract int getMessageCount() throws MessagingException
Get total number of messages in this Folder.This method can be invoked on a closed folder. However, note that for some folder implementations, getting the total message count can be an expensive operation involving actually opening the folder. In such cases, a provider can choose not to support this functionality in the closed state, in which case this method must return -1.
Clients invoking this method on a closed folder must be aware that this is a potentially expensive operation. Clients must also be prepared to handle a return value of -1 in this case.
- Returns:
- total number of messages. -1 may be returned by certain implementations if this method is invoked on a closed folder.
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- for other failures
-
getNewMessageCount
public int getNewMessageCount() throws MessagingException
Get the number of new messages in this Folder.This method can be invoked on a closed folder. However, note that for some folder implementations, getting the new message count can be an expensive operation involving actually opening the folder. In such cases, a provider can choose not to support this functionality in the closed state, in which case this method must return -1.
Clients invoking this method on a closed folder must be aware that this is a potentially expensive operation. Clients must also be prepared to handle a return value of -1 in this case.
This implementation returns -1 if this folder is closed. Else this implementation gets each Message in the folder using
getMessage(int)
and checks whether itsRECENT
flag is set. The total number of messages that have this flag set is returned.- Returns:
- number of new messages. -1 may be returned by certain implementations if this method is invoked on a closed folder.
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- for other failures
-
getUnreadMessageCount
public int getUnreadMessageCount() throws MessagingException
Get the total number of unread messages in this Folder.This method can be invoked on a closed folder. However, note that for some folder implementations, getting the unread message count can be an expensive operation involving actually opening the folder. In such cases, a provider can choose not to support this functionality in the closed state, in which case this method must return -1.
Clients invoking this method on a closed folder must be aware that this is a potentially expensive operation. Clients must also be prepared to handle a return value of -1 in this case.
This implementation returns -1 if this folder is closed. Else this implementation gets each Message in the folder using
getMessage(int)
and checks whether itsSEEN
flag is set. The total number of messages that do not have this flag set is returned.- Returns:
- total number of unread messages. -1 may be returned by certain implementations if this method is invoked on a closed folder.
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- for other failures
-
getDeletedMessageCount
public int getDeletedMessageCount() throws MessagingException
Get the number of deleted messages in this Folder.This method can be invoked on a closed folder. However, note that for some folder implementations, getting the deleted message count can be an expensive operation involving actually opening the folder. In such cases, a provider can choose not to support this functionality in the closed state, in which case this method must return -1.
Clients invoking this method on a closed folder must be aware that this is a potentially expensive operation. Clients must also be prepared to handle a return value of -1 in this case.
This implementation returns -1 if this folder is closed. Else this implementation gets each Message in the folder using
getMessage(int)
and checks whether itsDELETED
flag is set. The total number of messages that have this flag set is returned.- Returns:
- number of deleted messages. -1 may be returned by certain implementations if this method is invoked on a closed folder.
- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- for other failures- Since:
- JavaMail 1.3
-
getMessage
public abstract Message getMessage(int msgnum) throws MessagingException
Get the Message object corresponding to the given message number. A Message object's message number is the relative position of this Message in its Folder. Messages are numbered starting at 1 through the total number of message in the folder. Note that the message number for a particular Message can change during a session if other messages in the Folder are deleted and the Folder is expunged.Message objects are light-weight references to the actual message that get filled up on demand. Hence Folder implementations are expected to provide light-weight Message objects.
Unlike Folder objects, repeated calls to getMessage with the same message number will return the same Message object, as long as no messages in this folder have been expunged.
Since message numbers can change within a session if the folder is expunged , clients are advised not to use message numbers as references to messages. Use Message objects instead.
- Parameters:
msgnum
- the message number- Returns:
- the Message object
- Throws:
FolderNotFoundException
- if this folder does not exist.IllegalStateException
- if this folder is not openedIndexOutOfBoundsException
- if the message number is out of range.MessagingException
- for other failures- See Also:
getMessageCount()
,fetch(jakarta.mail.Message[], jakarta.mail.FetchProfile)
-
getMessages
public Message[] getMessages(int start, int end) throws MessagingException
Get the Message objects for message numbers ranging from start through end, both start and end inclusive. Note that message numbers start at 1, not 0.Message objects are light-weight references to the actual message that get filled up on demand. Hence Folder implementations are expected to provide light-weight Message objects.
This implementation uses getMessage(index) to obtain the required Message objects. Note that the returned array must contain
(end-start+1)
Message objects.- Parameters:
start
- the number of the first messageend
- the number of the last message- Returns:
- the Message objects
- Throws:
FolderNotFoundException
- if this folder does not exist.IllegalStateException
- if this folder is not opened.IndexOutOfBoundsException
- if the start or end message numbers are out of range.MessagingException
- for other failures- See Also:
fetch(jakarta.mail.Message[], jakarta.mail.FetchProfile)
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getMessages
public Message[] getMessages(int[] msgnums) throws MessagingException
Get the Message objects for message numbers specified in the array.Message objects are light-weight references to the actual message that get filled up on demand. Hence Folder implementations are expected to provide light-weight Message objects.
This implementation uses getMessage(index) to obtain the required Message objects. Note that the returned array must contain
msgnums.length
Message objects- Parameters:
msgnums
- the array of message numbers- Returns:
- the array of Message objects.
- Throws:
FolderNotFoundException
- if this folder does not exist.IllegalStateException
- if this folder is not opened.IndexOutOfBoundsException
- if any message number in the given array is out of range.MessagingException
- for other failures- See Also:
fetch(jakarta.mail.Message[], jakarta.mail.FetchProfile)
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getMessages
public Message[] getMessages() throws MessagingException
Get all Message objects from this Folder. Returns an empty array if the folder is empty. Clients can use Message objects (instead of sequence numbers) as references to the messages within a folder; this method supplies the Message objects to the client. Folder implementations are expected to provide light-weight Message objects, which get filled on demand.This implementation invokes
getMessageCount()
to get the current message count and then usesgetMessage()
to get Message objects from 1 till the message count.- Returns:
- array of Message objects, empty array if folder is empty.
- Throws:
FolderNotFoundException
- if this folder does not exist.IllegalStateException
- if this folder is not opened.MessagingException
- for other failures- See Also:
fetch(jakarta.mail.Message[], jakarta.mail.FetchProfile)
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appendMessages
public abstract void appendMessages(Message[] msgs) throws MessagingException
Append given Messages to this folder. This method can be invoked on a closed Folder. An appropriate MessageCountEvent is delivered to any MessageCountListener registered on this folder when the messages arrive in the folder.Folder implementations must not abort this operation if a Message in the given message array turns out to be an expunged Message.
- Parameters:
msgs
- array of Messages to be appended- Throws:
FolderNotFoundException
- if this folder does not exist.MessagingException
- if the append failed.
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fetch
public void fetch(Message[] msgs, FetchProfile fp) throws MessagingException
Prefetch the items specified in the FetchProfile for the given Messages.Clients use this method to indicate that the specified items are needed en-masse for the given message range. Implementations are expected to retrieve these items for the given message range in a efficient manner. Note that this method is just a hint to the implementation to prefetch the desired items.
An example is a client filling its header-view window with the Subject, From and X-mailer headers for all messages in the folder.
Message[] msgs = folder.getMessages(); FetchProfile fp = new FetchProfile(); fp.add(FetchProfile.Item.ENVELOPE); fp.add("X-mailer"); folder.fetch(msgs, fp); for (int i = 0; i < folder.getMessageCount(); i++) { display(msg[i].getFrom()); display(msg[i].getSubject()); display(msg[i].getHeader("X-mailer")); }
The implementation provided here just returns without doing anything useful. Providers wanting to provide a real implementation for this method should override this method.
- Parameters:
msgs
- fetch items for these messagesfp
- the FetchProfile- Throws:
IllegalStateException
- if this folder is not openedMessagingException
- for other failures
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setFlags
public void setFlags(Message[] msgs, Flags flag, boolean value) throws MessagingException
Set the specified flags on the messages specified in the array. This will result in appropriate MessageChangedEvents being delivered to any MessageChangedListener registered on this Message's containing folder.Note that the specified Message objects must belong to this folder. Certain Folder implementations can optimize the operation of setting Flags for a group of messages, so clients might want to use this method, rather than invoking
Message.setFlags
for each Message.This implementation degenerates to invoking
setFlags()
on each Message object. Specific Folder implementations that can optimize this case should do so. Also, an implementation must not abort the operation if a Message in the array turns out to be an expunged Message.- Parameters:
msgs
- the array of message objectsflag
- Flags object containing the flags to be setvalue
- set the flags to this boolean value- Throws:
IllegalStateException
- if this folder is not opened or if it has been opened READ_ONLY.MessagingException
- for other failures- See Also:
Message.setFlags(jakarta.mail.Flags, boolean)
,MessageChangedEvent
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setFlags
public void setFlags(int start, int end, Flags flag, boolean value) throws MessagingException
Set the specified flags on the messages numbered from start through end, both start and end inclusive. Note that message numbers start at 1, not 0. This will result in appropriate MessageChangedEvents being delivered to any MessageChangedListener registered on this Message's containing folder.Certain Folder implementations can optimize the operation of setting Flags for a group of messages, so clients might want to use this method, rather than invoking
Message.setFlags
for each Message.The default implementation uses
getMessage(int)
to get eachMessage
object and then invokessetFlags
on that object to set the flags. Specific Folder implementations that can optimize this case should do so. Also, an implementation must not abort the operation if a message number refers to an expunged message.- Parameters:
start
- the number of the first messageend
- the number of the last messageflag
- Flags object containing the flags to be setvalue
- set the flags to this boolean value- Throws:
IllegalStateException
- if this folder is not opened or if it has been opened READ_ONLY.IndexOutOfBoundsException
- if the start or end message numbers are out of range.MessagingException
- for other failures- See Also:
Message.setFlags(jakarta.mail.Flags, boolean)
,MessageChangedEvent
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setFlags
public void setFlags(int[] msgnums, Flags flag, boolean value) throws MessagingException
Set the specified flags on the messages whose message numbers are in the array. This will result in appropriate MessageChangedEvents being delivered to any MessageChangedListener registered on this Message's containing folder.Certain Folder implementations can optimize the operation of setting Flags for a group of messages, so clients might want to use this method, rather than invoking
Message.setFlags
for each Message.The default implementation uses
getMessage(int)
to get eachMessage
object and then invokessetFlags
on that object to set the flags. Specific Folder implementations that can optimize this case should do so. Also, an implementation must not abort the operation if a message number refers to an expunged message.- Parameters:
msgnums
- the array of message numbersflag
- Flags object containing the flags to be setvalue
- set the flags to this boolean value- Throws:
IllegalStateException
- if this folder is not opened or if it has been opened READ_ONLY.IndexOutOfBoundsException
- if any message number in the given array is out of range.MessagingException
- for other failures- See Also:
Message.setFlags(jakarta.mail.Flags, boolean)
,MessageChangedEvent
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copyMessages
public void copyMessages(Message[] msgs, Folder folder) throws MessagingException
Copy the specified Messages from this Folder into another Folder. This operation appends these Messages to the destination Folder. The destination Folder does not have to be opened. An appropriate MessageCountEvent is delivered to any MessageCountListener registered on the destination folder when the messages arrive in the folder.Note that the specified Message objects must belong to this folder. Folder implementations might be able to optimize this method by doing server-side copies.
This implementation just invokes
appendMessages()
on the destination folder to append the given Messages. Specific folder implementations that support server-side copies should do so, if the destination folder's Store is the same as this folder's Store. Also, an implementation must not abort the operation if a Message in the array turns out to be an expunged Message.- Parameters:
msgs
- the array of message objectsfolder
- the folder to copy the messages to- Throws:
FolderNotFoundException
- if the destination folder does not exist.IllegalStateException
- if this folder is not opened.MessagingException
- for other failures- See Also:
appendMessages(jakarta.mail.Message[])
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expunge
public abstract Message[] expunge() throws MessagingException
Expunge (permanently remove) messages marked DELETED. Returns an array containing the expunged message objects. ThegetMessageNumber
method on each of these message objects returns that Message's original (that is, prior to the expunge) sequence number. A MessageCountEvent containing the expunged messages is delivered to any MessageCountListeners registered on the folder.Expunge causes the renumbering of Message objects subsequent to the expunged messages. Clients that use message numbers as references to messages should be aware of this and should be prepared to deal with the situation (probably by flushing out existing message number caches and reloading them). Because of this complexity, it is better for clients to use Message objects as references to messages, rather than message numbers. Any expunged Messages objects still have to be pruned, but other Messages in that folder are not affected by the expunge.
After a message is expunged, only the
isExpunged
andgetMessageNumber
methods are still valid on the corresponding Message object; other methods may throwMessageRemovedException
- Returns:
- array of expunged Message objects
- Throws:
FolderNotFoundException
- if this folder does not existIllegalStateException
- if this folder is not opened.MessagingException
- for other failures- See Also:
Message.isExpunged()
,MessageCountEvent
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search
public Message[] search(SearchTerm term) throws MessagingException
Search this Folder for messages matching the specified search criterion. Returns an array containing the matching messages . Returns an empty array if no matches were found.This implementation invokes
search(term, getMessages())
, to apply the search over all the messages in this folder. Providers that can implement server-side searching might want to override this method to provide a more efficient implementation.- Parameters:
term
- the search criterion- Returns:
- array of matching messages
- Throws:
SearchException
- if the search term is too complex for the implementation to handle.FolderNotFoundException
- if this folder does not exist.IllegalStateException
- if this folder is not opened.MessagingException
- for other failures- See Also:
SearchTerm
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search
public Message[] search(SearchTerm term, Message[] msgs) throws MessagingException
Search the given array of messages for those that match the specified search criterion. Returns an array containing the matching messages. Returns an empty array if no matches were found.Note that the specified Message objects must belong to this folder.
This implementation iterates through the given array of messages, and applies the search criterion on each message by calling its
match()
method with the given term. The messages that succeed in the match are returned. Providers that can implement server-side searching might want to override this method to provide a more efficient implementation. If the search term is too complex or contains user-defined terms that cannot be executed on the server, providers may elect to either throw a SearchException or degenerate to client-side searching by callingsuper.search()
to invoke this implementation.- Parameters:
term
- the search criterionmsgs
- the messages to be searched- Returns:
- array of matching messages
- Throws:
SearchException
- if the search term is too complex for the implementation to handle.IllegalStateException
- if this folder is not openedMessagingException
- for other failures- See Also:
SearchTerm
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addConnectionListener
public void addConnectionListener(ConnectionListener l)
Add a listener for Connection events on this Folder.The implementation provided here adds this listener to an internal list of ConnectionListeners.
- Parameters:
l
- the Listener for Connection events- See Also:
ConnectionEvent
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removeConnectionListener
public void removeConnectionListener(ConnectionListener l)
Remove a Connection event listener.The implementation provided here removes this listener from the internal list of ConnectionListeners.
- Parameters:
l
- the listener- See Also:
addConnectionListener(jakarta.mail.event.ConnectionListener)
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notifyConnectionListeners
protected void notifyConnectionListeners(int type)
Notify all ConnectionListeners. Folder implementations are expected to use this method to broadcast connection events.The provided implementation queues the event into an internal event queue. An event dispatcher thread dequeues events from the queue and dispatches them to the registered ConnectionListeners. Note that the event dispatching occurs in a separate thread, thus avoiding potential deadlock problems.
- Parameters:
type
- the ConnectionEvent type- See Also:
ConnectionEvent
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addFolderListener
public void addFolderListener(FolderListener l)
Add a listener for Folder events on this Folder.The implementation provided here adds this listener to an internal list of FolderListeners.
- Parameters:
l
- the Listener for Folder events- See Also:
FolderEvent
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removeFolderListener
public void removeFolderListener(FolderListener l)
Remove a Folder event listener.The implementation provided here removes this listener from the internal list of FolderListeners.
- Parameters:
l
- the listener- See Also:
addFolderListener(jakarta.mail.event.FolderListener)
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notifyFolderListeners
protected void notifyFolderListeners(int type)
Notify all FolderListeners registered on this Folder and this folder's Store. Folder implementations are expected to use this method to broadcast Folder events.The implementation provided here queues the event into an internal event queue. An event dispatcher thread dequeues events from the queue and dispatches them to the FolderListeners registered on this folder. The implementation also invokes
notifyFolderListeners
on this folder's Store to notify any FolderListeners registered on the store.- Parameters:
type
- type of FolderEvent- See Also:
notifyFolderRenamedListeners(jakarta.mail.Folder)
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notifyFolderRenamedListeners
protected void notifyFolderRenamedListeners(Folder folder)
Notify all FolderListeners registered on this Folder and this folder's Store about the renaming of this folder. Folder implementations are expected to use this method to broadcast Folder events indicating the renaming of folders.The implementation provided here queues the event into an internal event queue. An event dispatcher thread dequeues events from the queue and dispatches them to the FolderListeners registered on this folder. The implementation also invokes
notifyFolderRenamedListeners
on this folder's Store to notify any FolderListeners registered on the store.- Parameters:
folder
- Folder representing the new name.- Since:
- JavaMail 1.1
- See Also:
notifyFolderListeners(int)
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addMessageCountListener
public void addMessageCountListener(MessageCountListener l)
Add a listener for MessageCount events on this Folder.The implementation provided here adds this listener to an internal list of MessageCountListeners.
- Parameters:
l
- the Listener for MessageCount events- See Also:
MessageCountEvent
-
removeMessageCountListener
public void removeMessageCountListener(MessageCountListener l)
Remove a MessageCount listener.The implementation provided here removes this listener from the internal list of MessageCountListeners.
- Parameters:
l
- the listener- See Also:
addMessageCountListener(jakarta.mail.event.MessageCountListener)
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notifyMessageAddedListeners
protected void notifyMessageAddedListeners(Message[] msgs)
Notify all MessageCountListeners about the addition of messages into this folder. Folder implementations are expected to use this method to broadcast MessageCount events for indicating arrival of new messages.The provided implementation queues the event into an internal event queue. An event dispatcher thread dequeues events from the queue and dispatches them to the registered MessageCountListeners. Note that the event dispatching occurs in a separate thread, thus avoiding potential deadlock problems.
- Parameters:
msgs
- the messages that were added
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notifyMessageRemovedListeners
protected void notifyMessageRemovedListeners(boolean removed, Message[] msgs)
Notify all MessageCountListeners about the removal of messages from this Folder. Folder implementations are expected to use this method to broadcast MessageCount events indicating removal of messages.The provided implementation queues the event into an internal event queue. An event dispatcher thread dequeues events from the queue and dispatches them to the registered MessageCountListeners. Note that the event dispatching occurs in a separate thread, thus avoiding potential deadlock problems.
- Parameters:
removed
- was the message removed by this client?msgs
- the messages that were removed
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addMessageChangedListener
public void addMessageChangedListener(MessageChangedListener l)
Add a listener for MessageChanged events on this Folder.The implementation provided here adds this listener to an internal list of MessageChangedListeners.
- Parameters:
l
- the Listener for MessageChanged events- See Also:
MessageChangedEvent
-
removeMessageChangedListener
public void removeMessageChangedListener(MessageChangedListener l)
Remove a MessageChanged listener.The implementation provided here removes this listener from the internal list of MessageChangedListeners.
- Parameters:
l
- the listener- See Also:
addMessageChangedListener(jakarta.mail.event.MessageChangedListener)
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notifyMessageChangedListeners
protected void notifyMessageChangedListeners(int type, Message msg)
Notify all MessageChangedListeners. Folder implementations are expected to use this method to broadcast MessageChanged events.The provided implementation queues the event into an internal event queue. An event dispatcher thread dequeues events from the queue and dispatches them to registered MessageChangedListeners. Note that the event dispatching occurs in a separate thread, thus avoiding potential deadlock problems.
- Parameters:
type
- the MessageChangedEvent typemsg
- the message that changed
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finalize
protected void finalize() throws Throwable
-
-