1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/samples/instanceofclass/src-api2.0/api/InstanceProvider.java	Sat Jun 14 09:53:34 2008 +0200
     1.3 @@ -0,0 +1,40 @@
     1.4 +
     1.5 +package api;
     1.6 +
     1.7 +// BEGIN: instanceof.class.InstanceProvider2
     1.8 +public final class InstanceProvider {
     1.9 +    private final Object instance;
    1.10 +
    1.11 +    public InstanceProvider(Object instance) {
    1.12 +        this.instance = instance;
    1.13 +    }
    1.14 +    
    1.15 +    public Class<?> instanceClass() {
    1.16 +        return instance.getClass();
    1.17 +    }
    1.18 +    public Object instanceCreate() {
    1.19 +        return instance;
    1.20 +    }
    1.21 +    
    1.22 +    /** @since 2.0 */
    1.23 +    public boolean isInstanceOf(Class<?> c) {
    1.24 +        if (Helper.knownHowToDoItBetter()) {
    1.25 +            return Helper.computeTheResultOfIsInstanceOfInSomeBetterWay(c);
    1.26 +        } else {
    1.27 +            // fallback
    1.28 +            return c.isAssignableFrom(instanceClass());
    1.29 +        }
    1.30 +    }
    1.31 +
    1.32 +    
    1.33 +}
    1.34 +// END: instanceof.class.InstanceProvider2
    1.35 +
    1.36 +class Helper {
    1.37 +    static boolean computeTheResultOfIsInstanceOfInSomeBetterWay(Class<?> c) {
    1.38 +        return false;
    1.39 +    }
    1.40 +    static boolean knownHowToDoItBetter() {
    1.41 +        return false;
    1.42 +    }
    1.43 +}
    1.44 \ No newline at end of file