Examples with SimpleFilter org.apache.felix.connect.felix.framework.capabilityset.SimpleFilter used on opensource projects

Example 1 with SimpleFilter

use of org.apache.felix.connect.felix.framework.capabilityset.SimpleFilter in project felix by apache.

the class PojoSRBundleContext method getServiceReferences.

/**
 * Retrieves an array of {@link ServiceReference} objects based on calling bundle,
 * service class name, and filter expression.  Optionally checks for isAssignable to
 * make sure that the service can be cast to the
 * @param className Service Classname or <code>null</code> for all
 * @param expr Filter Criteria or <code>null</code>
 * @return Array of ServiceReference objects that meet the criteria
 * @throws InvalidSyntaxException
 */
ServiceReference[] getServiceReferences(final String className, final String expr, final boolean checkAssignable) throws InvalidSyntaxException {
    // Define filter if expression is not null.
    SimpleFilter filter = null;
    if (expr != null) {
        try {
            filter = SimpleFilter.parse(expr);
        } catch (Exception ex) {
            throw new InvalidSyntaxException(ex.getMessage(), expr);
        }
    }
    // Ask the service registry for all matching service references.
    final Collection<ServiceReference<?>> refList = m_reg.getServiceReferences(className, filter);
    // Filter on assignable references
    if (checkAssignable) {
        for (Iterator<ServiceReference<?>> it = refList.iterator(); it.hasNext(); ) {
            // Get the current service reference.
            ServiceReference ref = it.next();
            // Now check for castability.
            if (!Util.isServiceAssignable(m_bundle, ref)) {
                it.remove();
            }
        }
    }
    // activate findhooks
    Set<ServiceReference<FindHook>> findHooks = m_reg.getHooks(org.osgi.framework.hooks.service.FindHook.class);
    for (ServiceReference<org.osgi.framework.hooks.service.FindHook> sr : findHooks) {
        org.osgi.framework.hooks.service.FindHook fh = m_reg.getService(getBundle(0), sr);
        if (fh != null) {
            try {
                fh.find(this, className, expr, !checkAssignable, new ShrinkableCollection<ServiceReference<?>>(refList));
            } catch (Throwable th) {
                System.err.println("Problem invoking service registry hook");
                th.printStackTrace();
            } finally {
                m_reg.ungetService(getBundle(0), sr);
            }
        }
    }
    if (refList.size() > 0) {
        return refList.toArray(new ServiceReference[refList.size()]);
    }
    return null;
}

Example 2 with SimpleFilter

use of org.apache.felix.connect.felix.framework.capabilityset.SimpleFilter in project felix by apache.

the class ServiceRegistry method getServiceReferences.

public synchronized Collection<ServiceReference<?>> getServiceReferences(String className, SimpleFilter filter) {
    if ((className == null) && (filter == null)) {
        // Return all services.
        filter = new SimpleFilter(Constants.OBJECTCLASS, "*", SimpleFilter.PRESENT);
    } else if ((className != null) && (filter == null)) {
        // Return services matching the class name.
        filter = new SimpleFilter(Constants.OBJECTCLASS, className, SimpleFilter.EQ);
    } else if ((className != null) && (filter != null)) {
        // Return services matching the class name and filter.
        List<Object> filters = new ArrayList<Object>(2);
        filters.add(new SimpleFilter(Constants.OBJECTCLASS, className, SimpleFilter.EQ));
        filters.add(filter);
        filter = new SimpleFilter(null, filters, SimpleFilter.AND);
    }
    // else just use the specified filter.
    Set<ServiceRegistrationImpl.ServiceReferenceImpl> matches = m_regCapSet.match(filter, false);
    return (Collection) matches;
}