org.osgi.framework

## Interface Bundle

All Superinterfaces:
  Comparable<Bundle>

All Known Subinterfaces:
  Framework

All Known Implementing Classes:
  Felix

    @ProviderType
    public interface Bundle
    extends Comparable<Bundle>

An installed bundle in the Framework.

A `Bundle` object is the access point to define the lifecycle of an installed bundle. Each bundle installed in the OSGi environment must have an associated `Bundle` object.

A bundle must have a unique identity, a `long`, chosen by the Framework. This identity must not change during the lifecycle of a bundle, even when the bundle is updated. Uninstalling and then reinstalling the bundle must create a new unique identity.

A bundle can be in one of six states:

- `UNINSTALLED`
- `INSTALLED`
- `RESOLVED`
- `STARTING`
- `STOPPING`
- `ACTIVE`

Values assigned to these states have no specified ordering; they represent bit values that may be ORed together to determine if a bundle is in one of the valid states.

A bundle should only have active threads of execution when its state is one of `STARTING`,`ACTIVE`, or `STOPPING`. An `UNINSTALLED` bundle can not be set to another state; it is a zombie and can only be reached because references are kept somewhere.

The Framework is the only entity that is allowed to create `Bundle` objects, and these objects are only valid within the Framework that created them.

Bundles have a natural ordering such that if two `Bundle`s have the same `bundle id` they are equal. A `Bundle` is less than another `Bundle` if it has a lower `bundle id` and is greater if it has a higher bundle id.

Author:
  $Id: 545299bc454bb01ef73a14693ffec76a13430eea $

### Field Summary

Fields
`static int` `ACTIVE` The bundle is now running.
`static int` `INSTALLED` The bundle is installed but not yet resolved.
`static int` `RESOLVED` The bundle is resolved and is able to be started.
`static int` `SIGNERS_ALL` Request that all certificates used to sign the bundle be returned.
`static int` `SIGNERS_TRUSTED` Request that only certificates used to sign the bundle that are trusted by the framework be returned.
`static int` `START_ACTIVATION_POLICY` The bundle start operation must activate the bundle according to the bundle's declared `activation policy`.
`static int` `START_TRANSIENT` The bundle start operation is transient and the persistent autostart setting of the bundle is not modified.
`static int` `STARTING` The bundle is in the process of starting.
`static int` `STOP_TRANSIENT` The bundle stop is transient and the persistent autostart setting of the bundle is not modified.
`static int` `STOPPING` The bundle is in the process of stopping.
`static int` `UNINSTALLED` The bundle is uninstalled and may not be used.

### Method Summary

All Methods Instance Methods Abstract Methods
`<A> A` `adapt(Class<A> type)` Adapt this bundle to the specified type.
`Enumeration<URL>` `findEntries(String path, String filePattern, boolean recurse)` Returns entries in this bundle and its attached fragments.
`BundleContext` `getBundleContext()` Returns this bundle's `BundleContext`.
`long` `getBundleId()` Returns this bundle's unique identifier.
`File` `getDataFile(String filename)` Creates a `File` object for a file in the persistent storage area provided for this bundle by the Framework.
`URL` `getEntry(String path)` Returns a URL to the entry at the specified path in this bundle.
`Enumeration<String>` `getEntryPaths(String path)` Returns an Enumeration of all the paths (`String` objects) to entries within this bundle whose longest sub-path matches the specified path.
`Dictionary<String,String>` `getHeaders()` Returns this bundle's Manifest headers and values.
`Dictionary<String,String>` `getHeaders(String locale)` Returns this bundle's Manifest headers and values localized to the specified locale.
`long` `getLastModified()` Returns the time when this bundle was last modified.
`String` `getLocation()` Returns this bundle's location identifier.
`ServiceReference<?>[]` `getRegisteredServices()` Returns this bundle's `ServiceReference` list for all services it has registered or `null` if this bundle has no registered services.
`URL` `getResource(String name)` Find the specified resource from this bundle's class loader.
`Enumeration<URL>` `getResources(String name)` Find the specified resources from this bundle's class loader.
`ServiceReference<?>[]` `getServicesInUse()` Returns this bundle's `ServiceReference` list for all services it is using or returns `null` if this bundle is not using any services.
`Map<X509Certificate,List<X509Certificate>>` `getSignerCertificates(int signersType)` Return the certificates for the signers of this bundle and the certificate chains for those signers.
`int` `getState()` Returns this bundle's current state.
`String` `getSymbolicName()` Returns the symbolic name of this bundle as specified by its `Bundle-SymbolicName` manifest header.
`Version` `getVersion()` Returns the version of this bundle as specified by its `Bundle-Version` manifest header.
`boolean` `hasPermission(Object permission)` Determines if this bundle has the specified permissions.
`Class<?>` `loadClass(String name)` Loads the specified class using this bundle's class loader.
`void` `start()` Starts this bundle with no options.
`void` `start(int options)` Starts this bundle.
`void` `stop()` Stops this bundle with no options.
`void` `stop(int options)` Stops this bundle.
`void` `uninstall()` Uninstalls this bundle.
`void` `update()` Updates this bundle.
`void` `update(InputStream input)` Updates this bundle from an `InputStream`.

### Methods inherited from interface java.lang.Comparable

`compareTo`

### Field Detail

#### UNINSTALLED

    static final int UNINSTALLED

The bundle is uninstalled and may not be used.

The `UNINSTALLED` state is only visible after a bundle is uninstalled; the bundle is in an unusable state but references to the `Bundle` object may still be available and used for introspection.

The value of `UNINSTALLED` is 0x00000001.

See Also:
  Constant Field Values

#### INSTALLED

    static final int INSTALLED

The bundle is installed but not yet resolved.

A bundle is in the `INSTALLED` state when it has been installed in the Framework but is not or cannot be resolved.

This state is visible if the bundle's code dependencies are not resolved. The Framework may attempt to resolve an `INSTALLED` bundle's code dependencies and move the bundle to the `RESOLVED` state.

The value of `INSTALLED` is 0x00000002.

See Also:
  Constant Field Values

#### RESOLVED

    static final int RESOLVED

The bundle is resolved and is able to be started.

A bundle is in the `RESOLVED` state when the Framework has successfully resolved the bundle's code dependencies. These dependencies include:

- The bundle's class path from its `Constants.BUNDLE_CLASSPATH` Manifest header.
- The bundle's package dependencies from its `Constants.EXPORT_PACKAGE` and `Constants.IMPORT_PACKAGE` Manifest headers.
- The bundle's required bundle dependencies from its `Constants.REQUIRE_BUNDLE` Manifest header.
- A fragment bundle's host dependency from its `Constants.FRAGMENT_HOST` Manifest header.

Note that the bundle is not active yet. A bundle must be put in the `RESOLVED` state before it can be started. The Framework may attempt to resolve a bundle at any time.

The value of `RESOLVED` is 0x00000004.

See Also:
  Constant Field Values

#### STARTING

    static final int STARTING

The bundle is in the process of starting.

A bundle is in the `STARTING` state when its `start` method is active. A bundle must be in this state when the bundle's `BundleActivator.start(BundleContext)` is called. If the `BundleActivator.start` method completes without exception, then the bundle has successfully started and must move to the `ACTIVE` state.

If the bundle has a `lazy activation policy`, then the bundle may remain in this state for some time until the activation is triggered.

The value of `STARTING` is 0x00000008.

See Also:
  Constant Field Values

#### STOPPING

    static final int STOPPING

The bundle is in the process of stopping.

A bundle is in the `STOPPING` state when its `stop` method is active. A bundle must be in this state when the bundle's `BundleActivator.stop(BundleContext)` method is called. When the `BundleActivator.stop` method completes the bundle is stopped and must move to the `RESOLVED` state.

The value of `STOPPING` is 0x00000010.

See Also:
  Constant Field Values

#### ACTIVE

    static final int ACTIVE

The bundle is now running.

A bundle is in the `ACTIVE` state when it has been successfully started and activated.

The value of `ACTIVE` is 0x00000020.

See Also:
  Constant Field Values

#### START_TRANSIENT

    static final int START_TRANSIENT

The bundle start operation is transient and the persistent autostart setting of the bundle is not modified.

This bit may be set when calling `start(int)` to notify the framework that the autostart setting of the bundle must not be modified. If this bit is not set, then the autostart setting of the bundle is modified.

Since:
  1.4
See Also:
  `start(int)`, Constant Field Values

#### START_ACTIVATION_POLICY

    static final int START_ACTIVATION_POLICY

The bundle start operation must activate the bundle according to the bundle's declared `activation policy`.

This bit may be set when calling `start(int)` to notify the framework that the bundle must be activated using the bundle's declared activation policy.

Since:
  1.4
See Also:
  `Constants.BUNDLE_ACTIVATIONPOLICY`, `start(int)`, Constant Field Values

#### STOP_TRANSIENT

    static final int STOP_TRANSIENT

The bundle stop is transient and the persistent autostart setting of the bundle is not modified.

This bit may be set when calling `stop(int)` to notify the framework that the autostart setting of the bundle must not be modified. If this bit is not set, then the autostart setting of the bundle is modified.

Since:
  1.4
See Also:
  `stop(int)`, Constant Field Values

#### SIGNERS_ALL

    static final int SIGNERS_ALL

Request that all certificates used to sign the bundle be returned.

Since:
  1.5
See Also:
  `getSignerCertificates(int)`, Constant Field Values

#### SIGNERS_TRUSTED

    static final int SIGNERS_TRUSTED

Request that only certificates used to sign the bundle that are trusted by the framework be returned.

Since:
  1.5
See Also:
  `getSignerCertificates(int)`, Constant Field Values

### Method Detail

#### getState

    int getState()

Returns this bundle's current state.

A bundle can be in only one state at any time.

Returns:
  An element of `UNINSTALLED`,`INSTALLED`, `RESOLVED`, `STARTING`, `STOPPING`, `ACTIVE`.

#### start

    void start(int options)
        throws BundleException

Starts this bundle.

If this bundle's state is `UNINSTALLED` then an `IllegalStateException` is thrown.

If the current start level is less than this bundle's start level:

- If the `START_TRANSIENT` option is set, then a `BundleException` is thrown indicating this bundle cannot be started due to the Framework's current start level.
- Otherwise, the Framework must set this bundle's persistent autostart setting to Started with declared activation if the `START_ACTIVATION_POLICY` option is set or Started with eager activation if not set.

When the Framework's current start level becomes equal to or more than this bundle's start level, this bundle will be started.

Otherwise, the following steps are required to start this bundle:

1. If this bundle is in the process of being activated or deactivated then this method must wait for activation or deactivation to complete before continuing. If this does not occur in a reasonable time, a `BundleException` is thrown to indicate this bundle was unable to be started.
2. If the `START_TRANSIENT` option is not set then set this bundle's autostart setting to Started with declared activation if the `START_ACTIVATION_POLICY` option is set or Started with eager activation if not set. When the Framework is restarted and this bundle's autostart setting is not Stopped, this bundle must be automatically started.
3. If this bundle's state is `ACTIVE` then this method returns immediately.
4. If this bundle's state is not `RESOLVED`, an attempt is made to resolve this bundle. If the Framework cannot resolve this bundle, a `BundleException` is thrown.
5. If the `START_ACTIVATION_POLICY` option is set and this bundle's declared activation policy is `lazy` then:
   - If this bundle's state is `STARTING` then this method returns immediately.
   - This bundle's state is set to `STARTING`.
   - A bundle event of type `BundleEvent.LAZY_ACTIVATION` is fired.
   - This method returns immediately and the remaining steps will be followed when this bundle's activation is later triggered.
6. This bundle's state is set to `STARTING`.
7. A bundle event of type `BundleEvent.STARTING` is fired.
8. The `BundleActivator.start(BundleContext)` method of this bundle's `BundleActivator`, if one is specified, is called. If the `BundleActivator` is invalid or throws an exception then:
   - This bundle's state is set to `STOPPING`.
   - A bundle event of type `BundleEvent.STOPPING` is fired.
   - Any services registered by this bundle must be unregistered.
   - Any services used by this bundle must be released.
   - Any listeners registered by this bundle must be removed.
   - This bundle's state is set to `RESOLVED`.
   - A bundle event of type `BundleEvent.STOPPED` is fired.
   - A `BundleException` is then thrown.
9. This bundle's state is set to `ACTIVE`.
10. A bundle event of type `BundleEvent.STARTED` is fired.

Preconditions

- `getState()` in { `INSTALLED`, `RESOLVED` } or { `INSTALLED`, `RESOLVED`, `STARTING` } if this bundle has a lazy activation policy.

Postconditions, no exceptions thrown

- Bundle autostart setting is modified unless the `START_TRANSIENT` option was set.
- `getState()` in { `ACTIVE` } unless the lazy activation policy was used.
- `BundleActivator.start()` has been called and did not throw an exception unless the lazy activation policy was used.

Postconditions, when an exception is thrown

- Depending on when the exception occurred, bundle autostart setting is modified unless the `START_TRANSIENT` option was set.
- `getState()` not in { `STARTING`, `ACTIVE` }.

Parameters:
  `options` - The options for starting this bundle. See `START_TRANSIENT` and `START_ACTIVATION_POLICY`. The Framework must ignore unrecognized options.
Throws:
  `BundleException` - If this bundle could not be started. BundleException types thrown by this method include: `BundleException.START_TRANSIENT_ERROR`, `BundleException.NATIVECODE_ERROR`, `BundleException.RESOLVE_ERROR`, `BundleException.STATECHANGE_ERROR`, and `BundleException.ACTIVATOR_ERROR`.
  `IllegalStateException` - If this bundle has been uninstalled or this bundle tries to change its own state.
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,EXECUTE]`, and the Java Runtime Environment supports permissions.
Since:
  1.4

#### start

    void start()
        throws BundleException

Starts this bundle with no options.

This method performs the same function as calling `start(0)`.

Throws:
  `BundleException` - If this bundle could not be started. BundleException types thrown by this method include: `BundleException.NATIVECODE_ERROR`, `BundleException.RESOLVE_ERROR`, `BundleException.STATECHANGE_ERROR`, and `BundleException.ACTIVATOR_ERROR`.
  `IllegalStateException` - If this bundle has been uninstalled or this bundle tries to change its own state.
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,EXECUTE]`, and the Java Runtime Environment supports permissions.
See Also:
  `start(int)`

#### stop

    void stop(int options)
       throws BundleException

Stops this bundle.

The following steps are required to stop a bundle:

1. If this bundle's state is `UNINSTALLED` then an `IllegalStateException` is thrown.
2. If this bundle is in the process of being activated or deactivated then this method must wait for activation or deactivation to complete before continuing. If this does not occur in a reasonable time, a `BundleException` is thrown to indicate this bundle was unable to be stopped.
3. If the `STOP_TRANSIENT` option is not set then set this bundle's persistent autostart setting to Stopped. When the Framework is restarted and this bundle's autostart setting is Stopped, this bundle must not be automatically started.
4. If this bundle's state is not `STARTING` or `ACTIVE` then this method returns immediately.
5. This bundle's state is set to `STOPPING`.
6. A bundle event of type `BundleEvent.STOPPING` is fired.
7. If this bundle's state was `ACTIVE` prior to setting the state to `STOPPING`, the `BundleActivator.stop(BundleContext)` method of this bundle's `BundleActivator`, if one is specified, is called. If that method throws an exception, this method must continue to stop this bundle and a `BundleException` must be thrown after completion of the remaining steps.
8. Any services registered by this bundle must be unregistered.
9. Any services used by this bundle must be released.
10. Any listeners registered by this bundle must be removed.
11. If this bundle's state is `UNINSTALLED`, because this bundle was uninstalled while the `BundleActivator.stop` method was running, a `BundleException` must be thrown.
12. This bundle's state is set to `RESOLVED`.
13. A bundle event of type `BundleEvent.STOPPED` is fired.

Preconditions

- `getState()` in { `ACTIVE` }.

Postconditions, no exceptions thrown

- Bundle autostart setting is modified unless the `STOP_TRANSIENT` option was set.
- `getState()` not in { `ACTIVE`, `STOPPING` }.
- `BundleActivator.stop` has been called and did not throw an exception.

Postconditions, when an exception is thrown

- Bundle autostart setting is modified unless the `STOP_TRANSIENT` option was set.

Parameters:
  `options` - The options for stopping this bundle. See `STOP_TRANSIENT`. The Framework must ignore unrecognized options.
Throws:
  `BundleException` - BundleException types thrown by this method include: `BundleException.STATECHANGE_ERROR` and `BundleException.ACTIVATOR_ERROR`.
  `IllegalStateException` - If this bundle has been uninstalled or this bundle tries to change its own state.
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,EXECUTE]`, and the Java Runtime Environment supports permissions.
Since:
  1.4

#### stop

    void stop()
       throws BundleException

Stops this bundle with no options.

This method performs the same function as calling `stop(0)`.

Throws:
  `BundleException` - BundleException types thrown by this method include: `BundleException.STATECHANGE_ERROR` and `BundleException.ACTIVATOR_ERROR`.
  `IllegalStateException` - If this bundle has been uninstalled or this bundle tries to change its own state.
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,EXECUTE]`, and the Java Runtime Environment supports permissions.
See Also:
  `start(int)`

#### update

    void update(InputStream input)
         throws BundleException

Updates this bundle from an `InputStream`.

If the specified `InputStream` is `null`, the Framework must create the `InputStream` from which to read the updated bundle by interpreting, in an implementation dependent manner, this bundle's `Bundle-UpdateLocation` Manifest header, if present, or this bundle's original location.

If this bundle's state is `ACTIVE`, it must be stopped before the update and started after the update successfully completes.

If this bundle has exported any packages that are imported by another bundle, these packages must remain exported until the `FrameworkWiring.refreshBundles` method has been has been called or the Framework is relaunched.

The following steps are required to update a bundle:

1. If this bundle's state is `UNINSTALLED` then an `IllegalStateException` is thrown.
2. If this bundle's state is `ACTIVE`, `STARTING` or `STOPPING`, this bundle is stopped as described in the `Bundle.stop` method. If `Bundle.stop` throws an exception, the exception is rethrown terminating the update.
3. The updated version of this bundle is read from the input stream and installed. If the Framework is unable to install the updated version of this bundle, the original version of this bundle must be restored and a `BundleException` must be thrown after completion of the remaining steps.
4. This bundle's state is set to `INSTALLED`.
5. If the updated version of this bundle was successfully installed, a bundle event of type `BundleEvent.UPDATED` is fired.
6. If this bundle's state was originally `ACTIVE`, the updated bundle is started as described in the `Bundle.start` method. If `Bundle.start` throws an exception, a Framework event of type `FrameworkEvent.ERROR` is fired containing the exception.

Preconditions

- `getState()` not in { `UNINSTALLED` }.

Postconditions, no exceptions thrown

- `getState()` in { `INSTALLED`, `RESOLVED`, `ACTIVE` }.
- This bundle has been updated.

Postconditions, when an exception is thrown

- `getState()` in { `INSTALLED`, `RESOLVED`, `ACTIVE` }.
- Original bundle is still used; no update occurred.

Parameters:
  `input` - The `InputStream` from which to read the new bundle or `null` to indicate the Framework must create the input stream from this bundle's `Bundle-UpdateLocation` Manifest header, if present, or this bundle's original location. The input stream must always be closed when this method completes, even if an exception is thrown.
Throws:
  `BundleException` - If this bundle could not be updated. BundleException types thrown by this method include: `BundleException.READ_ERROR`, `BundleException.DUPLICATE_BUNDLE_ERROR`, `BundleException.MANIFEST_ERROR`, `BundleException.NATIVECODE_ERROR`, `BundleException.RESOLVE_ERROR`, `BundleException.STATECHANGE_ERROR`, and `BundleException.ACTIVATOR_ERROR`.
  `IllegalStateException` - If this bundle has been uninstalled or this bundle tries to change its own state.
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,LIFECYCLE]` for both the current bundle and the updated bundle, and the Java Runtime Environment supports permissions.
See Also:
  `stop()`, `start()`

#### update

    void update()
         throws BundleException

Updates this bundle.

This method performs the same function as calling `update(InputStream)` with a `null` InputStream.

Throws:
  `BundleException` - If this bundle could not be updated. BundleException types thrown by this method include: `BundleException.READ_ERROR`, `BundleException.DUPLICATE_BUNDLE_ERROR`, `BundleException.MANIFEST_ERROR`, `BundleException.NATIVECODE_ERROR`, `BundleException.RESOLVE_ERROR`, `BundleException.STATECHANGE_ERROR`, and `BundleException.ACTIVATOR_ERROR`.
  `IllegalStateException` - If this bundle has been uninstalled or this bundle tries to change its own state.
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,LIFECYCLE]` for both the current bundle and the updated bundle, and the Java Runtime Environment supports permissions.
See Also:
  `update(InputStream)`

#### uninstall

    void uninstall()
            throws BundleException

Uninstalls this bundle.

This method causes the Framework to notify other bundles that this bundle is being uninstalled, and then puts this bundle into the `UNINSTALLED` state. The Framework must remove any resources related to this bundle that it is able to remove.

If this bundle has exported any packages, the Framework must continue to make these packages available to their importing bundles until the `FrameworkWiring.refreshBundles` method has been called or the Framework is relaunched.

The following steps are required to uninstall a bundle:

1. If this bundle's state is `UNINSTALLED` then an `IllegalStateException` is thrown.
2. If this bundle's state is `ACTIVE`, `STARTING` or `STOPPING`, this bundle is stopped as described in the `Bundle.stop` method. If `Bundle.stop` throws an exception, a Framework event of type `FrameworkEvent.ERROR` is fired containing the exception.
3. This bundle's state is set to `UNINSTALLED`.
4. A bundle event of type `BundleEvent.UNINSTALLED` is fired.
5. This bundle and any persistent storage area provided for this bundle by the Framework are removed.

Preconditions

- `getState()` not in { `UNINSTALLED` }.

Postconditions, no exceptions thrown

- `getState()` in { `UNINSTALLED` }.
- This bundle has been uninstalled.

Postconditions, when an exception is thrown

- `getState()` not in { `UNINSTALLED` }.
- This Bundle has not been uninstalled.

Throws:
  `BundleException` - If the uninstall failed. This can occur if another thread is attempting to change this bundle's state and does not complete in a timely manner. BundleException types thrown by this method include: `BundleException.STATECHANGE_ERROR`
  `IllegalStateException` - If this bundle has been uninstalled or this bundle tries to change its own state.
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,LIFECYCLE]`, and the Java Runtime Environment supports permissions.
See Also:
  `stop()`

#### getHeaders

    Dictionary<String,String> getHeaders()

Returns this bundle's Manifest headers and values. This method returns all the Manifest headers and values from the main section of this bundle's Manifest file; that is, all lines prior to the first blank line.

Manifest header names are case-insensitive. The methods of the returned `Dictionary` object must operate on header names in a case-insensitive manner. If a Manifest header value starts with "%", it must be localized according to the default locale. If no localization is found for a header value, the header value without the leading "%" is returned.

For example, the following Manifest headers and values are included if they are present in the Manifest file:

         Bundle-Name
         Bundle-Vendor
         Bundle-Version
         Bundle-Description
         Bundle-DocURL
         Bundle-ContactAddress

This method must continue to return Manifest header information while this bundle is in the `UNINSTALLED` state.

Returns:
  An unmodifiable `Dictionary` object containing this bundle's Manifest headers and values.
Throws:
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,METADATA]`, and the Java Runtime Environment supports permissions.
See Also:
  `Constants.BUNDLE_LOCALIZATION`

#### getBundleId

    long getBundleId()

Returns this bundle's unique identifier. This bundle is assigned a unique identifier by the Framework when it was installed in the OSGi environment.

A bundle's unique identifier has the following attributes:

- Is unique and persistent.
- Is a `long`.
- Its value is not reused for another bundle, even after a bundle is uninstalled.
- Does not change while a bundle remains installed.
- Does not change when a bundle is updated.

This method must continue to return this bundle's unique identifier while this bundle is in the `UNINSTALLED` state.

Returns:
  The unique identifier of this bundle.

#### getLocation

    String getLocation()

Returns this bundle's location identifier.

The location identifier is the location passed to `BundleContext.installBundle` when a bundle is installed. The location identifier does not change while this bundle remains installed, even if this bundle is updated.

This method must continue to return this bundle's location identifier while this bundle is in the `UNINSTALLED` state.

Returns:
  The string representation of this bundle's location identifier.
Throws:
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,METADATA]`, and the Java Runtime Environment supports permissions.

#### getRegisteredServices

    ServiceReference<?>[] getRegisteredServices()

Returns this bundle's `ServiceReference` list for all services it has registered or `null` if this bundle has no registered services.

If the Java runtime supports permissions, a `ServiceReference` object to a service is included in the returned list only if the caller has the `ServicePermission` to get the service using at least one of the named classes the service was registered under.

The list is valid at the time of the call to this method, however, as the Framework is a very dynamic environment, services can be modified or unregistered at anytime.

Returns:
  An array of `ServiceReference` objects or `null`.
Throws:
  `IllegalStateException` - If this bundle has been uninstalled.
See Also:
  `ServiceRegistration`, `ServiceReference`, `ServicePermission`

#### getServicesInUse

    ServiceReference<?>[] getServicesInUse()

Returns this bundle's `ServiceReference` list for all services it is using or returns `null` if this bundle is not using any services. A bundle is considered to be using a service if it has any unreleased service objects.

If the Java Runtime Environment supports permissions, a `ServiceReference` object to a service is included in the returned list only if the caller has the `ServicePermission` to get the service using at least one of the named classes the service was registered under.

The list is valid at the time of the call to this method, however, as the Framework is a very dynamic environment, services can be modified or unregistered at anytime.

Returns:
  An array of `ServiceReference` objects or `null`.
Throws:
  `IllegalStateException` - If this bundle has been uninstalled.
See Also:
  `ServiceReference`, `ServicePermission`

#### hasPermission

    boolean hasPermission(Object permission)

Determines if this bundle has the specified permissions.

If the Java Runtime Environment does not support permissions, this method always returns `true`.

`permission` is of type `Object` to avoid referencing the `java.security.Permission` class directly. This is to allow the Framework to be implemented in Java environments which do not support permissions.

If the Java Runtime Environment does support permissions, this bundle and all its resources including embedded JAR files, belong to the same `java.security.ProtectionDomain`; that is, they must share the same set of permissions.

Parameters:
  `permission` - The permission to verify.
Returns:
  `true` if this bundle has the specified permission or the permissions possessed by this bundle imply the specified permission; `false` if this bundle does not have the specified permission or `permission` is not an `instanceof` `java.security.Permission`.
Throws:
  `IllegalStateException` - If this bundle has been uninstalled.

#### getResource

    URL getResource(String name)

Find the specified resource from this bundle's class loader. This bundle's class loader is called to search for the specified resource. If this bundle's state is `INSTALLED`, this method must attempt to resolve this bundle before attempting to get the specified resource. If this bundle cannot be resolved, then only this bundle must be searched for the specified resource. Imported packages cannot be searched when this bundle has not been resolved. If this bundle is a fragment bundle then `null` is returned.

Note: Jar and zip files are not required to include directory entries. URLs to directory entries will not be returned if the bundle contents do not contain directory entries.

Parameters:
  `name` - The name of the resource. See `ClassLoader.getResource` for a description of the format of a resource name.
Returns:
  A URL to the named resource, or `null` if the resource could not be found or if this bundle is a fragment bundle or if the caller does not have the appropriate `AdminPermission[this,RESOURCE]`, and the Java Runtime Environment supports permissions.
Throws:
  `IllegalStateException` - If this bundle has been uninstalled.
Since:
  1.1
See Also:
  `getEntry(String)`, `findEntries(String, String, boolean)`

#### getHeaders

    Dictionary<String,String> getHeaders(String locale)

Returns this bundle's Manifest headers and values localized to the specified locale.

This method performs the same function as `Bundle.getHeaders()` except the manifest header values are localized to the specified locale.

If a Manifest header value starts with "%", it must be localized according to the specified locale. If a locale is specified and cannot be found, then the header values must be returned using the default locale. Localizations are searched for in the following order:

       bn + "_" + Ls + "_" + Cs + "_" + Vs
       bn + "_" + Ls + "_" + Cs
       bn + "_" + Ls
       bn + "_" + Ld + "_" + Cd + "_" + Vd
       bn + "_" + Ld + "_" + Cd
       bn + "_" + Ld
       bn

Where `bn` is this bundle's localization basename, `Ls`, `Cs` and `Vs` are the specified locale (language, country, variant) and `Ld`, `Cd` and `Vd` are the default locale (language, country, variant). If `null` is specified as the locale string, the header values must be localized using the default locale. If the empty string ("") is specified as the locale string, the header values must not be localized and the raw (unlocalized) header values, including any leading "%", must be returned. If no localization is found for a header value, the header value without the leading "%" is returned.

This method must continue to return Manifest header information while this bundle is in the `UNINSTALLED` state, however the header values must only be available in the raw and default locale values.

Parameters:
  `locale` - The locale name into which the header values are to be localized. If the specified locale is `null` then the locale returned by `java.util.Locale.getDefault` is used. If the specified locale is the empty string, this method will return the raw (unlocalized) manifest headers including any leading "%".
Returns:
  An unmodifiable `Dictionary` object containing this bundle's Manifest headers and values.
Throws:
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,METADATA]`, and the Java Runtime Environment supports permissions.
Since:
  1.3
See Also:
  `getHeaders()`, `Constants.BUNDLE_LOCALIZATION`

#### getSymbolicName

    String getSymbolicName()

Returns the symbolic name of this bundle as specified by its `Bundle-SymbolicName` manifest header. The bundle symbolic name should be based on the reverse domain name naming convention like that used for java packages.

This method must continue to return this bundle's symbolic name while this bundle is in the `UNINSTALLED` state.

Returns:
  The symbolic name of this bundle or `null` if this bundle does not have a symbolic name.
Since:
  1.3

#### loadClass

    Class<?> loadClass(String name)
                throws ClassNotFoundException

Loads the specified class using this bundle's class loader.

If this bundle is a fragment bundle then this method must throw a `ClassNotFoundException`.

If this bundle's state is `INSTALLED`, this method must attempt to resolve this bundle before attempting to load the class.

If this bundle cannot be resolved, a Framework event of type `FrameworkEvent.ERROR` is fired containing a `BundleException` with details of the reason this bundle could not be resolved. This method must then throw a `ClassNotFoundException`.

If this bundle's state is `UNINSTALLED`, then an `IllegalStateException` is thrown.

Parameters:
  `name` - The name of the class to load.
Returns:
  The Class object for the requested class.
Throws:
  `ClassNotFoundException` - If no such class can be found or if this bundle is a fragment bundle or if the caller does not have the appropriate `AdminPermission[this,CLASS]`, and the Java Runtime Environment supports permissions.
  `IllegalStateException` - If this bundle has been uninstalled.
Since:
  1.3

#### getResources

    Enumeration<URL> getResources(String name)
                           throws IOException

Find the specified resources from this bundle's class loader. This bundle's class loader is called to search for the specified resources. If this bundle's state is `INSTALLED`, this method must attempt to resolve this bundle before attempting to get the specified resources. If this bundle cannot be resolved, then only this bundle must be searched for the specified resources. Imported packages cannot be searched when a bundle has not been resolved. If this bundle is a fragment bundle then `null` is returned.

Note: Jar and zip files are not required to include directory entries. URLs to directory entries will not be returned if the bundle contents do not contain directory entries.

Parameters:
  `name` - The name of the resource. See `ClassLoader.getResources` for a description of the format of a resource name.
Returns:
  An enumeration of URLs to the named resources, or `null` if the resource could not be found or if this bundle is a fragment bundle or if the caller does not have the appropriate `AdminPermission[this,RESOURCE]`, and the Java Runtime Environment supports permissions.
Throws:
  `IllegalStateException` - If this bundle has been uninstalled.
  `IOException` - If there is an I/O error.
Since:
  1.3

#### getEntryPaths

    Enumeration<String> getEntryPaths(String path)

Returns an Enumeration of all the paths (`String` objects) to entries within this bundle whose longest sub-path matches the specified path. This bundle's class loader is not used to search for entries. Only the contents of this bundle are searched.

The specified path is always relative to the root of this bundle and may begin with a "/". A path value of "/" indicates the root of this bundle.

Returned paths indicating subdirectory paths end with a "/". The returned paths are all relative to the root of this bundle and must not begin with "/".

Note: Jar and zip files are not required to include directory entries. Paths to directory entries will not be returned if the bundle contents do not contain directory entries.

Parameters:
  `path` - The path name for which to return entry paths.
Returns:
  An Enumeration of the entry paths (`String` objects) or `null` if no entry could be found or if the caller does not have the appropriate `AdminPermission[this,RESOURCE]` and the Java Runtime Environment supports permissions.
Throws:
  `IllegalStateException` - If this bundle has been uninstalled.
Since:
  1.3

#### getEntry

    URL getEntry(String path)

Returns a URL to the entry at the specified path in this bundle. This bundle's class loader is not used to search for the entry. Only the contents of this bundle are searched for the entry.

The specified path is always relative to the root of this bundle and may begin with "/". A path value of "/" indicates the root of this bundle.

Note: Jar and zip files are not required to include directory entries. URLs to directory entries will not be returned if the bundle contents do not contain directory entries.

Parameters:
  `path` - The path name of the entry.
Returns:
  A URL to the entry, or `null` if no entry could be found or if the caller does not have the appropriate `AdminPermission[this,RESOURCE]` and the Java Runtime Environment supports permissions.
Throws:
  `IllegalStateException` - If this bundle has been uninstalled.
Since:
  1.3

#### getLastModified

    long getLastModified()

Returns the time when this bundle was last modified. A bundle is considered to be modified when it is installed, updated or uninstalled.

The time value is the number of milliseconds since January 1, 1970, 00:00:00 UTC.

Returns:
  The time when this bundle was last modified.
Since:
  1.3

#### findEntries

    Enumeration<URL> findEntries(String path,
                                 String filePattern,
                                 boolean recurse)

Returns entries in this bundle and its attached fragments. This bundle's class loader is not used to search for entries. Only the contents of this bundle and its attached fragments are searched for the specified entries. If this bundle's state is `INSTALLED`, this method must attempt to resolve this bundle before attempting to find entries.

This method is intended to be used to obtain configuration, setup, localization and other information from this bundle. This method takes into account that the "contents" of this bundle can be extended with fragments. This "bundle space" is not a namespace with unique members; the same entry name can be present multiple times. This method therefore returns an enumeration of URL objects. These URLs can come from different JARs but have the same path name. This method can either return only entries in the specified path or recurse into subdirectories returning entries in the directory tree beginning at the specified path. Fragments can be attached after this bundle is resolved, possibly changing the set of URLs returned by this method. If this bundle is not resolved, only the entries in the JAR file of this bundle are returned.

Examples:

     // List all XML files in the OSGI-INF directory and below
     Enumeration e = b.findEntries("OSGI-INF", "*.xml", true);

     // Find a specific localization file
     Enumeration e = b.findEntries("OSGI-INF/l10n",
         "bundle_nl_DU.properties", false);
     if (e.hasMoreElements())
         return (URL) e.nextElement();

URLs for directory entries must have their path end with "/".

Note: Jar and zip files are not required to include directory entries. URLs to directory entries will not be returned if the bundle contents do not contain directory entries.

Parameters:
  `path` - The path name in which to look. The path is always relative to the root of this bundle and may begin with "/". A path value of "/" indicates the root of this bundle.
  `filePattern` - The file name pattern for selecting entries in the specified path. The pattern is only matched against the last element of the entry path. If the entry is a directory then the trailing "/" is not used for pattern matching. Substring matching is supported, as specified in the Filter specification, using the wildcard character ("*"). If null is specified, this is equivalent to "*" and matches all files.
  `recurse` - If `true`, recurse into subdirectories. Otherwise only return entries from the specified path.
Returns:
  An enumeration of URL objects for each matching entry, or `null` if no matching entry could be found or if the caller does not have the appropriate `AdminPermission[this,RESOURCE]`, and the Java Runtime Environment supports permissions. The URLs are sorted such that entries from this bundle are returned first followed by the entries from attached fragments in attachment order. If this bundle is a fragment, then only matching entries in this fragment are returned.
Throws:
  `IllegalStateException` - If this bundle has been uninstalled.
Since:
  1.3

#### getBundleContext

    BundleContext getBundleContext()

Returns this bundle's `BundleContext`. The returned `BundleContext` can be used by the caller to act on behalf of this bundle.

If this bundle is not in the `STARTING`, `ACTIVE`, or `STOPPING` states or this bundle is a fragment bundle, then this bundle has no valid `BundleContext`. This method will return `null` if this bundle has no valid `BundleContext`.

Returns:
  A `BundleContext` for this bundle or `null` if this bundle has no valid `BundleContext`.
Throws:
  `SecurityException` - If the caller does not have the appropriate `AdminPermission[this,CONTEXT]`, and the Java Runtime Environment supports permissions.
Since:
  1.4

#### getSignerCertificates

    Map<X509Certificate,List<X509Certificate>> getSignerCertificates(int signersType)

Return the certificates for the signers of this bundle and the certificate chains for those signers.

Parameters:
  `signersType` - If `SIGNERS_ALL` is specified, then information on all signers of this bundle is returned. If `SIGNERS_TRUSTED` is specified, then only information on the signers of this bundle trusted by the framework is returned.
Returns:
  The `X509Certificate`s for the signers of this bundle and the `X509Certificate` chains for those signers. The keys of the `Map` are the `X509Certificate`s of the signers of this bundle. The value for a key is a `List` containing the `X509Certificate` chain for the signer. The first item in the `List` is the signer's `X509Certificate` which is then followed by the rest of the `X509Certificate` chain. The returned `Map` will be empty if there are no signers. The returned `Map` is the property of the caller who is free to modify it.
Throws:
  `IllegalArgumentException` - If the specified `signersType` is not `SIGNERS_ALL` or `SIGNERS_TRUSTED`.
Since:
  1.5

#### getVersion

    Version getVersion()

Returns the version of this bundle as specified by its `Bundle-Version` manifest header. If this bundle does not have a specified version then `Version.emptyVersion` is returned.

This method must continue to return this bundle's version while this bundle is in the `UNINSTALLED` state.

Returns:
  The version of this bundle.
Since:
  1.5

#### adapt

    <A> A adapt(Class<A> type)

Adapt this bundle to the specified type.

Adapting this bundle to the specified type may require certain checks, including security checks, to succeed. If a check does not succeed, then this bundle cannot be adapted and `null` is returned.

Type Parameters:
  `A` - The type to which this bundle is to be adapted.
Parameters:
  `type` - Class object for the type to which this bundle is to be adapted.
Returns:
  The object, of the specified type, to which this bundle has been adapted or `null` if this bundle cannot be adapted to the specified type.
Throws:
  `SecurityException` - If the caller does not have the appropriate `AdaptPermission[type,this,ADAPT]`, and the Java Runtime Environment supports permissions.
Since:
  1.6

#### getDataFile

    File getDataFile(String filename)

Creates a `File` object for a file in the persistent storage area provided for this bundle by the Framework. This method will return `null` if the platform does not have file system support or this bundle is a fragment bundle.

A `File` object for the base directory of the persistent storage area provided for this bundle by the Framework can be obtained by calling this method with an empty string as `filename`.

If the Java Runtime Environment supports permissions, the Framework will ensure that this bundle has the `java.io.FilePermission` with actions `read`,`write`,`delete` for all files (recursively) in the persistent storage area provided for this bundle.

Parameters:
  `filename` - A relative name to the file to be accessed.
Returns:
  A `File` object that represents the requested file or `null` if the platform does not have file system support or this bundle is a fragment bundle.
Throws:
  `IllegalStateException` - If this bundle has been uninstalled.
Since:
  1.6