import director_ownership.*; public class director_ownership_runme { static { try { System.loadLibrary("director_ownership"); } catch (UnsatisfiedLinkError e) { System.err.println("Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" + e); System.exit(1); } } public static void set_content_and_release(Container container, ContentBase content) { content.swigReleaseOwnership(); container.set_content(content); } public static void main(String argv[]) { Container container = new Container(); // make a content in java (cMemoryOwn true) ContentBase content_java = new ContentDerived(); // make a content in c++ (cMemoryOwn true) ContentBase content_cpp = director_ownership.make_content(); set_content_and_release(container, content_java); if (!container.get_content().get_name().equals("ContentDerived")) throw new RuntimeException("did not get ContentDerived"); // when swigReleaseOwnership() is called on content_cpp, swig tries a static_cast to director and calls the method // director->swig_java_change_ownership. The content created in c++ native library is not a director, therefore a // segfault may occur. // With a check done using dynamic_cast this issue could be avoided. set_content_and_release(container, content_cpp); if (!container.get_content().get_name().equals("ContentDerived")) throw new RuntimeException("did not get ContentDerived"); } }