OSGI Unresolved requirement: Import-Package: com.pi4j.io.gpio - eclipse

Question

I want to write an OSGI Bundle (Eclipse SmartHome Binding) for the GPIO's of a Raspberry Pi.
For the GPIO's i need to include the Pi4J libraries. I added them into a lib folder in my project folder and added the pi4j-core.jar to my Build Path.
This is my code:
/**
* Copyright (c) 2014 openHAB UG (haftungsbeschraenkt) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package org.openhab.binding.statusgpio.handler;
import static org.openhab.binding.statusgpio.StatusGPIOBindingConstants.*;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import org.eclipse.smarthome.core.library.types.StringType;
import org.eclipse.smarthome.core.thing.ChannelUID;
import org.eclipse.smarthome.core.thing.Thing;
import org.eclipse.smarthome.core.thing.binding.BaseThingHandler;
import org.eclipse.smarthome.core.types.Command;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
import com.pi4j.io.gpio.GpioController;
import com.pi4j.io.gpio.GpioFactory;
import com.pi4j.io.gpio.GpioPinDigitalInput;
import com.pi4j.io.gpio.PinPullResistance;
import com.pi4j.io.gpio.RaspiPin;
import com.pi4j.io.gpio.event.GpioPinDigitalStateChangeEvent;
import com.pi4j.io.gpio.event.GpioPinListenerDigital;
/**
* The {#link StatusGPIOHandler} is responsible for handling commands, which are
* sent to one of the channels.
*
* #author Arjuna W. - Initial contribution
*/
public class StatusGPIOHandler extends BaseThingHandler {
ScheduledFuture<?> refreshJob;
public StatusGPIOHandler(Thing thing) {
super(thing);
}
#Override
public void initialize() {
// TODO Auto-generated method stub
super.initialize();
startAutomaticRefresh();
}
#Override
public void handleCommand(ChannelUID channelUID, Command command) {
// TODO Auto-generated method stub
// do nothing ;)
}
private void startAutomaticRefresh() {
final GpioController gpio = GpioFactory.getInstance();
// provision gpio pin #02 as an input pin with its internal pull down
// resistor enabled
final GpioPinDigitalInput myButton = gpio.provisionDigitalInputPin(
RaspiPin.GPIO_02, PinPullResistance.PULL_DOWN);
// create and register gpio pin listener
myButton.addListener(new GpioPinListenerDigital() {
#Override
public void handleGpioPinDigitalStateChangeEvent(
GpioPinDigitalStateChangeEvent event) {
// display pin state on console
updateState(new ChannelUID(getThing().getUID(), CHANNEL_LOADING_STATE), new StringType(event.getState().toString()));
}
});
try {
for (;;) {
Thread.sleep(1000);
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
The Class has no problem to find the Pi4J imports and export to a jar is also no problem. Only if I run it directly in the Eclipse OpenHab_runtime I geht the Error:
!Validation:
The following Problems were detected:
org.openhab.binding.statusgpio
Missing Constraint: Import-Package: com.pi4j.io.gpio; version="0.0.0"
When I start the OSGI Bundle on my Raspberry Pi (and on my Win PC) I get the message:
start 92
gogo: BundleException: Could not resolve module: org.openhab.binding.statusgpio [92]
Unresolved requirement: Import-Package: com.pi4j.io.gpio
I think I have to do something more with the Bundle to let OSGI find the Pi4J Libs???
Thanks for Help.

Answer 1

I found my own mistake:
I thought I hat to add "com.pi4j.io.gpio" to the includes in the Manifest file, but I don't want to import it from other OSGI Bundles, I want to import it from an alteady imported JAR. So I just had to delete this line and everything worked.
Edit:
I found the answer here: https://github.com/ECF/RaspberryPI/tree/master/bundles/com.pi4j
This is my manifest.mf:
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: OutputGPIO Binding
Bundle-SymbolicName: org.openhab.binding.outputgpio;singleton:=true
Bundle-Vendor: openHAB
Bundle-Version: 2.0.0.qualifier
Bundle-RequiredExecutionEnvironment: JavaSE-1.7
Bundle-ClassPath: lib/pi4j-core.jar,
lib/pi4j-device.jar,
lib/pi4j-gpio-extension.jar,
lib/pi4j-service.jar,
.
Import-Package: com.google.common.collect,
org.eclipse.smarthome.config.core,
org.eclipse.smarthome.config.discovery,
org.eclipse.smarthome.core.library.types,
org.eclipse.smarthome.core.thing,
org.eclipse.smarthome.core.thing.binding,
org.eclipse.smarthome.core.types,
org.slf4j
Service-Component: OSGI-INF/*
Export-Package: org.openhab.binding.outputgpio,
org.openhab.binding.outputgpio.handler