ExtensionDependency

Class Overview

This class checks dependent extensions a particular jar file may have declared through its manifest attributes.

Jar file declared dependent extensions through the extension-list attribute. The extension-list contains a list of keys used to fetch the other attributes describing the required extension. If key is the extension key declared in the extension-list attribute, the following describing attribute can be found in the manifest : key-Extension-Name: (Specification package name) key-Specification-Version: (Specification-Version) key-Implementation-Version: (Implementation-Version) key-Implementation-Vendor-Id: (Imlementation-Vendor-Id) key-Implementation-Version: (Implementation version) key-Implementation-URL: (URL to download the requested extension)

This class also maintain versioning consistency of installed extensions dependencies declared in jar file manifest.

Summary

Public Constructors
	ExtensionDependency()

Public Methods
synchronized static void	addExtensionInstallationProvider(ExtensionInstallationProvider eip) Register an ExtensionInstallationProvider.
static boolean	checkExtensionsDependencies(JarFile jar) Checks the dependencies of the jar file on installed extension.
synchronized static void	removeExtensionInstallationProvider(ExtensionInstallationProvider eip) Unregister a previously installed installation provider

Protected Methods
synchronized boolean	checkExtension(String extensionName, Attributes attr)
boolean	checkExtensionAgainst(String extensionName, Attributes attr, File file)
boolean	checkExtensions(JarFile jar)
boolean	installExtension(ExtensionInfo reqInfo, ExtensionInfo instInfo)

[Expand] Inherited Methods

From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait() Causes the current thread to wait until another thread invokes the notify() method or the notifyAll() method for this object. final void wait(long timeout, int nanos) Causes the current thread to wait until another thread invokes the notify() method or the notifyAll() method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed. final void wait(long timeout) Causes the current thread to wait until either another thread invokes the notify() method or the notifyAll() method for this object, or a specified amount of time has elapsed.