Examples with ProxyIterable org.graalvm.polyglot.proxy.ProxyIterable used on opensource projects

Example 1 with ProxyIterable

use of org.graalvm.polyglot.proxy.ProxyIterable in project graal by oracle.

the class IteratorTest method testProxyIterable.

@Test
public void testProxyIterable() {
    Object[] values = { "a", "b" };
    setupEnv(Context.newBuilder().allowAllAccess(true).build());
    Value iterable = context.asValue(ProxyIterable.from(Arrays.asList(values)));
    verifyIterable(iterable, values, false);
    iterable = context.asValue(new ProxyIterable() {

        @Override
        public Object getIterator() {
            return Arrays.asList(values).iterator();
        }
    });
    verifyIterable(iterable, values, false);
    iterable = context.asValue(new ProxyIterable() {

        @Override
        public Object getIterator() {
            return ProxyIterator.from(Arrays.asList(values).iterator());
        }
    });
    verifyIterable(iterable, values, false);
    iterable = context.asValue(new ProxyIterable() {

        @Override
        public Object getIterator() {
            return new SimpleIterator(values);
        }
    });
    verifyIterable(iterable, values, false);
    Value invalidIterable = context.asValue(new ProxyIterable() {

        @Override
        public Object getIterator() {
            return ProxyObject.fromMap(Collections.emptyMap());
        }
    });
    assertFails(() -> invalidIterable.getIterator(), PolyglotException.class, (pe) -> assertTrue(pe.asHostException() instanceof IllegalStateException));
}

Example 2 with ProxyIterable

use of org.graalvm.polyglot.proxy.ProxyIterable in project graal by oracle.

the class HostProxy method getIterator.

@ExportMessage
@TruffleBoundary
Object getIterator(@CachedLibrary("this") InteropLibrary library, @Shared("cache") @Cached(value = "this.context.getGuestToHostCache()", allowUncached = true) GuestToHostCodeCache cache) throws UnsupportedMessageException {
    if (proxy instanceof ProxyIterable) {
        Object result = guestToHostCall(library, cache.getIterator, context, proxy);
        Object guestValue = context.toGuestValue(library, result);
        InteropLibrary interop = InteropLibrary.getFactory().getUncached();
        if (!interop.isIterator(guestValue)) {
            throw illegalProxy(context, "getIterator() returned an invalid value %s but must return an iterator.", context.asValue(library, guestValue).toString());
        }
        return guestValue;
    } else {
        throw UnsupportedMessageException.create();
    }
}