org.osgi.annotation.bundle

Annotation Type Export

@Documented
 @Retention(value=CLASS)
 @Target(value=PACKAGE)
public @interface Export

Mark a package to be exported from its bundle.

The package must also be annotation with the Version annotation to specify the export version of the package.

This annotation is not retained at runtime. It is for use by tools to generate bundle manifests or otherwise process the package.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
java.lang.String[]	attribute A list of attribute or directive names and values.
Export.Substitution	substitution Specify the policy for substitutably importing this package.
java.lang.String[]	uses A list of package names that are used by this package.

Element Detail

uses

public abstract java.lang.String[] uses

A list of package names that are used by this package.

If the uses directive must be omitted from the export package clause for this package, the empty value {} must be specified.

If not specified, the uses directive for the export package clause is calculated by inspection of the classes in this package.

Default:

{}

attribute

public abstract java.lang.String[] attribute

A list of attribute or directive names and values.

Each string should be specified in the form:

• "name=value" for attributes.
• "name:type=value" for typed attributes.
• "name:=value" for directives.

These are added, separated by semicolons, to the export package clause.

Default:

{}

substitution

public abstract Export.Substitution substitution

Specify the policy for substitutably importing this package.

Bundles that collaborate require the same class loader for types used in the collaboration. If multiple bundles export packages with collaboration types then they will have to be placed in disjoint class spaces, making collaboration impossible. Collaboration is significantly improved when bundles are willing to import exported packages; these imports will allow a framework to substitute exports for imports.

If not specified, the Export.Substitution.CALCULATED substitution policy is used for this package.

Default:

org.osgi.annotation.bundle.Export.Substitution.CALCULATED