以编程方式获取已安装的功能

最好使用P2 API。下面是一个工作原理示例(未经测试,但您会明白):

Set<IInstallableUnit> findFeatures() throws ProvisionException {

    Set<IInstallableUnit> result = Sets.newHashSet();

    // 1. initialize necessary p2 services
    BundleContext ctx = FrameworkUtil.getBundle(getClass()).getBundleContext();
    ServiceReference<IProvisioningAgentProvider> ref = ctx.getServiceReference(IProvisioningAgentProvider.class);

    IProvisioningAgentProvider agentProvider = ctx.getService(ref);

    String profileId = IProfileRegistry.SELF; // the profile id for the currently running system
    URI location = null; // the location for the currently running system is null

    IProvisioningAgent provisioningAgent = agentProvider.createAgent(location);
    IProfileRegistry profileRegistry = (IProfileRegistry) provisioningAgent.getService(IProfileRegistry.SERVICE_NAME);
    IProfile p2Profile = profileRegistry.getProfile(profileId);

    // 2. create a query (check QueryUtil for options)
    IQuery<IInstallableUnit> query = QueryUtil.createIUGroupQuery();

    // 3. perform query
    IQueryResult<IInstallableUnit> queryResult = p2Profile.query(query, null);
    result = queryResult.toSet();

    return result;
}