Java Code Examples for org.osgi.resource.Resource#getCapabilities()

/**
 * Get the MIME-type of a repository resource.
 *
 * @param resource
 *          The resource to get the MIME type for.
 *
 * @return Resource MIME type or {@code null} if no MIME-type available.
 */
public static String getResourceMime(Resource resource)
{
  String res = null;
  for (final Capability cap : resource
      .getCapabilities(ContentNamespace.CONTENT_NAMESPACE)) {
    final Map<String, Object> attrs = cap.getAttributes();
    final String mime =
      (String) attrs.get(ContentNamespace.CAPABILITY_MIME_ATTRIBUTE);
    if (mime != null) {
      res = mime;
      break;
    }
  }
  return res;
}
 

/**
 * Get the location to use when installing this resource.
 *
 * If available, the resource URL will be used as the location. Otherwise we
 * simply use the hash code of the resource.
 *
 * @param resource
 *          the resource to determine the installation location for.
 * @return location to use when installing this resource or {@code null} if
 *         location is available for this resource.
 */
public static String getLocation(Resource resource)
{
  for (final Capability cap : resource
      .getCapabilities(ContentNamespace.CONTENT_NAMESPACE)) {
    final Map<String, Object> attrs = cap.getAttributes();
    if (supportedMimeTypes.contains(attrs
        .get(ContentNamespace.CAPABILITY_MIME_ATTRIBUTE))) {
      final String url =
        (String) attrs.get(ContentNamespace.CAPABILITY_URL_ATTRIBUTE);
      if (url != null) {
        return url;
      }
    }
  }
  return null;
}
 

private void addToProvidersIfMatching(Resource res, List<Capability> providers, Requirement req) {
	String f = req.getDirectives().get(Namespace.REQUIREMENT_FILTER_DIRECTIVE);
	Filter filter = null;
	if(f != null) {
	  try {
	    filter = bc.createFilter(f);
	  } catch (InvalidSyntaxException e) {
	    // TODO log filter failure, skip
	    System.err.println("Failed, " + f + ". " + e);
	    return;
	  }
	}
	for(Capability c : res.getCapabilities(req.getNamespace())) {
	  if(filter != null && !filter.matches(c.getAttributes())) {
	    continue;
	  }
	  providers.add(c);
	}
}
 

/**
 * Get the name of a repository resource from the identity name space."
 */
public static String getResourceName(Resource resource)
{
  final List<Capability> idCaps =
    resource.getCapabilities(IdentityNamespace.IDENTITY_NAMESPACE);
  if (idCaps.size() != 1) {
    Activator.log.error("Found " + idCaps.size()
                        + " identity capabilites expected one: " + idCaps);
    return resource.toString();
  }
  final Capability idCap = idCaps.get(0);
  return idCap.getAttributes().get(IdentityNamespace.IDENTITY_NAMESPACE)
      .toString();
}
 

/**
 * Get version of a repository resource form the identity name space.
 */
public static Version getResourceVersion(Resource resource)
{
  final List<Capability> idCaps =
    resource.getCapabilities(IdentityNamespace.IDENTITY_NAMESPACE);
  if (idCaps.size() != 1) {
    Activator.log.error("Found " + idCaps.size()
                        + " identity capabilites expected one: " + idCaps);
    return Version.emptyVersion;
  }
  final Capability idCap = idCaps.get(0);
  return (Version) idCap.getAttributes()
      .get(IdentityNamespace.CAPABILITY_VERSION_ATTRIBUTE);
}
 

/**
 * Get the type of a repository resource from the identity name space."
 *
 * @param resource
 *          The resource to get the type for.
 *
 * @return Type as a string, one of {@link IdentityNamespace#TYPE_BUNDLE},
 *         {@link IdentityNamespace#TYPE_FRAGMENT}, and
 *         {@link IdentityNamespace#TYPE_UNKNOWN}.
 */
public static String getResourceType(Resource resource)
{
  final List<Capability> idCaps =
    resource.getCapabilities(IdentityNamespace.IDENTITY_NAMESPACE);
  for (final Capability idCap : idCaps) {
    final String type =
      (String) idCap.getAttributes()
          .get(IdentityNamespace.CAPABILITY_TYPE_ATTRIBUTE);
    if (type != null) {
      return type;
    }
  }
  return "&mdash;";
}
 

/**
 * Get the size in bytes of a repository resource.
 *
 * @param resource
 *          The resource to get the size of.
 *
 * @return Resource size in byte or {@code -1} if no size available.
 */
public static long getResourceSize(Resource resource)
{
  long res = -1;
  for (final Capability cap : resource
      .getCapabilities(ContentNamespace.CONTENT_NAMESPACE)) {
    final Map<String, Object> attrs = cap.getAttributes();
    final Long size =
      (Long) attrs.get(ContentNamespace.CAPABILITY_SIZE_ATTRIBUTE);
    if (size != null) {
      res = size.longValue();
    }
  }
  return res;
}
 

/**
 * Get the category of a repository resource.
 *
 * The category is specified as the value of the bundle manifest entry named
 * {@link Constants#BUNDLE_CATEGORY}.
 *
 * @param resource
 *          The resource to get the category for.
 *
 * @return Resource category or {@code "[no category]"} if no category is available.
 */
public static String getResourceCategory(Resource resource)
{
  for (final Capability cap : resource
      .getCapabilities(KF_EXTRAS_NAMESPACE)) {
    final Map<String, Object> attrs = cap.getAttributes();
    final Object val = attrs.get("category");
    if (val != null) {
      return (String) val;
    }
  }
  return "[no category]";
}
 

/**
 * Get the vendor of a repository resource.
 *
 * The vendor is specified as the value of the bundle manifest entry named
 * {@link Constants#BUNDLE_VENDOR}.
 *
 * @param resource
 *          The resource to get the vendor for.
 *
 * @return Resource vendor or {@code "[no vendor]"} if vendor information is
 *         not available.
 */
public static String getResourceVendor(Resource resource)
{
  for (final Capability cap : resource
      .getCapabilities(KF_EXTRAS_NAMESPACE)) {
    final Map<String, Object> attrs = cap.getAttributes();
    final Object val = attrs.get("vendor");
    if (val != null) {
      return (String) val;
    }
  }
  return "[no vendor]";
}
 

/**
 * Get the icon for a repository resource.
 *
 * The icon is specified as the value of the bundle manifest entry named
 * {@code Bundle-Icon}.
 *
 * @param resource
 *          The resource to get the icon for.
 *
 * @return Resource icon string or {@code null} if icon information is
 *         not available.
 */
public static String getResourceIcon(Resource resource)
{
  for (final Capability cap : resource
      .getCapabilities(KF_EXTRAS_NAMESPACE)) {
    final Map<String, Object> attrs = cap.getAttributes();
    final Object val = attrs.get("icon");
    if (val != null) {
      return (String) val;
    }
  }
  return null;
}
 

private static void ensureOsgiContentUrlsAreAbsolute(URL repositoryUrl, Collection<Resource> rs) throws Exception {
  for(Resource r : rs) {
    for(Capability c : r.getCapabilities(ContentNamespace.CONTENT_NAMESPACE)) {
      String url = (String)c.getAttributes().get(ContentNamespace.CAPABILITY_URL_ATTRIBUTE);
      url = new URL(repositoryUrl, url).toExternalForm();
      c.getAttributes().put(ContentNamespace.CAPABILITY_URL_ATTRIBUTE, url);
    }
  }
}
 

void addAll(final Resource res) {
	for (final Capability cap : res.getCapabilities(null)) {
		add(cap);
	}
}
 

void removeAll(final Resource res) {
	for (final Capability cap : res.getCapabilities(null)) {
		remove(cap);
	}
}