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I'm looking at the manifest.mf for some apache libraries. While I can guess what Export-Package means, I can't find any documentation for these attributes ? Could anyone point me in the right direction. Here.s an example:
Manifest-Version: 1.0
Created-By: 1.6.0_07 (Sun Microsystems Inc.)
Built-By: pemben
Implementation-Title: Commons BeanUtils
Implementation-Vendor: The Apache Software Foundation
Implementation-Vendor-Id: org.apache
Implementation-Version: 1.8.2
Specification-Title: Commons BeanUtils
Specification-Vendor: The Apache Software Foundation
Specification-Version: 1.8.2
Export-Package: org.apache.commons.beanutils.locale.converters;
Private-Package: org.apache.commons.collections;version="1.8.2"
Ignore-Package: org.apache.commons.collections
Tool: Bnd-0.0.238
Bundle-Name: Commons BeanUtils
Bundle-Vendor: The Apache Software Foundation
Bundle-Version: 1.8.2
Bnd-LastModified: 1257775355133
Bundle-ManifestVersion: 2
Bundle-License: http://www.apache.org/licenses/LICENSE-2.0.txt
Bundle-Description: BeanUtils provides an easy-to-use but flexible wra
pper around reflection and introspection.
Import-Package: org.apache.commons.beanutils;version="1.8.2"
Bundle-SymbolicName: org.apache.commons.beanutils
Bundle-DocURL: http://commons.apache.org/beanutils/
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The bundle manifest file is an XML document that contains a list of app packages and resource packages in the bundle. The bundle manifest contains info about the architectures and resources of each package.
This header declares the external dependencies of the bundle that the OSGi Framework uses to resolve the bundle. Specific versions or version ranges for each package can be declared.
JAR files support a wide range of functionality, including electronic signing, version control, package sealing, and others. What gives a JAR file this versatility? The answer is the JAR file's manifest. The manifest is a special file that can contain information about the files packaged in a JAR file.
A MANIFEST file is an XML document that describes the manifest, or package contents, of a Windows software application. It is used by various Windows technologies for configuring and deploying software, including ClickOnce and the Common Language Runtime (CLR). MANIFEST files are often seen with the compound ".exe.
The Bundle attributes define info wrt. OSGi bundles. An OSGi bundle is simply a .jar file that also defines (via the attributes) what it exports, and what its dependencies are (including versions). Note that the .jar file can be used as a standard .jar file - the bundle information is only used in an OSGi container.
This JavaWorld article is a good introduction.
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