Package org.apache.felix.framework.cache

Class BundleArchiveRevision

java.lang.Object

org.apache.felix.framework.cache.BundleArchiveRevision

public abstract class BundleArchiveRevision
extends java.lang.Object

This class implements an abstract revision of a bundle archive. A revision is an abstraction of a bundle's actual content and is associated with a parent bundle archive. A bundle archive may have multiple revisions assocaited with it at one time, since updating a bundle results in a new version of the bundle's content until the bundle is refreshed. Upon a refresh, then old revisions are then purged. This abstract class is the base class for all concrete types of revisions, such as ones for a JAR file or directories. All revisions are assigned a root directory into which all of their state should be stored, if necessary. Clean up of this directory is the responsibility of the parent bundle archive and not of the revision itself.

See Also:

BundleCache, BundleArchive

Constructor Summary

Constructors

Constructor	Description
BundleArchiveRevision(Logger logger, java.util.Map configMap, java.io.File revisionRootDir, java.lang.String location)	This class is abstract and cannot be created.

Method Summary

Modifier and Type	Method	Description
protected abstract void	close()	This method is called when the revision is no longer needed.
java.util.Map	getConfig()	Returns the configuration map for this revision.
abstract Content	getContent()
java.lang.String	getLocation()	Returns the location string this revision.
Logger	getLogger()	Returns the logger for this revision.
abstract java.util.Map	getManifestHeader()	Returns the main attributes of the JAR file manifest header of the revision.
java.io.File	getRevisionRootDir()	Returns the root directory for this revision.

Methods inherited from class java.lang.Object

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

Constructor Detail

BundleArchiveRevision

public BundleArchiveRevision(Logger logger,
                             java.util.Map configMap,
                             java.io.File revisionRootDir,
                             java.lang.String location)
                      throws java.lang.Exception

This class is abstract and cannot be created. It represents a revision of a bundle, i.e., its content. A revision is associated with a particular location string, which is typically in URL format. Subclasses of this class provide particular functionality, such as a revision in the form of a JAR file or a directory. Each revision subclass is expected to use the root directory associated with the abstract revision instance to store any state; this will ensure that resources used by the revision are properly freed when the revision is no longer needed.

Parameters:

logger - a logger for use by the revision.

revisionRootDir - the root directory to be used by the revision subclass for storing any state.

location - the location string associated with the revision.

trustedCaCerts - the trusted CA certificates if any.

Throws:

java.lang.Exception - if any errors occur.

Method Detail

getLogger

public Logger getLogger()

Returns the logger for this revision.

Returns:

the logger instance for this revision.

getConfig

public java.util.Map getConfig()

Returns the configuration map for this revision.

Returns:

the configuration map for this revision.

getRevisionRootDir

public java.io.File getRevisionRootDir()

Returns the root directory for this revision.

Returns:

the root directory for this revision.

getLocation

public java.lang.String getLocation()

Returns the location string this revision.

Returns:

the location string for this revision.

getManifestHeader

public abstract java.util.Map getManifestHeader()
                                         throws java.lang.Exception

Returns the main attributes of the JAR file manifest header of the revision. The returned map is case insensitive.

Returns:

the case-insensitive JAR file manifest header of the revision.

Throws:

java.lang.Exception - if any error occurs.

getContent

public abstract Content getContent()
                            throws java.lang.Exception

Throws:

java.lang.Exception

close

protected abstract void close()
                       throws java.lang.Exception

This method is called when the revision is no longer needed. The directory associated with the revision will automatically be removed for each revision, so this method only needs to be concerned with other issues, such as open files.

Throws:

java.lang.Exception - if any error occurs.