codeql/java/ql/test/library-tests/frameworks/android/intent/TestStartActivityToGetIntent.java

import android.app.Activity;
import android.content.Context;
import android.content.Intent;

public class TestStartActivityToGetIntent {

    static Object source(String kind) {
        return null;
    }

    static void sink(Object sink) {
    }

    public void test(Context ctx, Activity act) {
        {
            Intent intentCtx = new Intent(null, SomeActivity.class);
            Intent intentAct = new Intent(null, SomeActivity.class);
            intentCtx.putExtra("data", (String) source("context"));
            intentAct.putExtra("data", (String) source("activity"));
            ctx.startActivity(intentCtx);
            act.startActivity(intentAct);
        }

        {
            Intent intentCtx = new Intent(null, SafeActivity.class);
            Intent intentAct = new Intent(null, SafeActivity.class);
            ctx.startActivity(intentCtx);
            act.startActivity(intentAct);
        }
    }

    static class SomeActivity extends Activity {

        public void test() {
            sink(getIntent().getStringExtra("data")); // $ hasValueFlow=context hasValueFlow=activity
        }
    }

    static class SafeActivity extends Activity {

        public void test() {
            sink(getIntent().getStringExtra("data")); // Safe
        }
    }
}