Interceptor.java

package components;

import org.apache.felix.ipojo.annotations.*;
import org.apache.felix.ipojo.architecture.PropertyDescription;
import org.apache.felix.ipojo.dependency.interceptors.DefaultServiceTrackingInterceptor;
import org.apache.felix.ipojo.dependency.interceptors.ServiceTrackingInterceptor;
import org.apache.felix.ipojo.dependency.interceptors.TransformedServiceReference;
import org.apache.felix.ipojo.handlers.configuration.ConfigurationHandler;
import org.apache.felix.ipojo.handlers.configuration.ConfigurationHandlerDescription;
import org.apache.felix.ipojo.util.DependencyModel;
import org.osgi.framework.BundleContext;

import java.util.Arrays;

/**
 * Created with IntelliJ IDEA.
 * User: clement
 * Date: 29/11/2013
 * Time: 11:24
 * To change this template use File | Settings | File Templates.
 */
@Component(immediate = true)
@Provides
@Instantiate
public class Interceptor extends DefaultServiceTrackingInterceptor implements ServiceTrackingInterceptor {

    private final BundleContext context;
    @ServiceProperty
    private String target = "(instance.name=components.FooComponent-0)";


    public Interceptor(BundleContext context) {
        this.context = context;
    }

    @Override
    public <S> TransformedServiceReference<S> accept(DependencyModel dependency, BundleContext context, TransformedServiceReference<S> ref) {
        ConfigurationHandlerDescription h = (ConfigurationHandlerDescription) dependency.getComponentInstance().getInstanceDescription()
                .getHandlerDescription("org.apache.felix.ipojo:properties");

        if (h == null) {
            return ref;
        }

        PropertyDescription description = h.getPropertyByName("ids");
        if (description == null) {
            return ref;
        }

        System.out.println(description.getValue() + " / " + Arrays.toString(
                (String[]) description.getCurrentValue()));

        return ref;
    }
}