Add Java 9 system module and compile in eclipse

I have some legacy java code, namely:

package org.alo.test.j9;
import javax.activation.DataHandler;   // in java.activation module
import javax.annotation.postconstruct; // in java.xml.ws.annotation module
public class OldClass {
    public static void main(String[] args) {
        DataHandler dh = new DataHandler(null,null);
        System.out.println(dh);
    }
}

This is not yet modular, so you need to use – add modules to compile using java 9

$javac -version
javac 9
$javac org/alo/test/j9/OldClass.java
src/org/alo/test/j9/OldClass.java:3: error: package javax.activation is not visible
import javax.activation.DataHandler;   // in java.activation module
            ^
  (package javax.activation is declared in module java.activation,which is not in the module graph)
src/org/alo/test/j9/OldClass.java:4: error: package javax.annotation is not visible
import javax.annotation.postconstruct; // in java.xml.ws.annotation module
            ^
  (package javax.annotation is declared in module java.xml.ws.annotation,which is not in the module graph)
2 errors

I need to add the module I am using to compile successfully:

$javac org/test/OldClass.java --add-modules=java.activation,java.xml.ws.annotation

I want to compile it in eclipse using java 9 (using oxygen. 1a) But I got to import javax Activation failed to resolve compilation errors

How do I tell the eclipse compiler to add these modules? I didn't find any hints about it in eclipse documentation

Here you can find a simple eclipse project I'm testing

Solution

Complete documentation of these functions still needs to be written, but new & notation for photon m3 (in progress) has begun The function you are looking for is in Mentioned in the opening paragraph

This dialog tab combines the effects of – add modules and – limit modules