Examples of CallSiteDescriptor

org.dynalang.dynalink.CallSiteDescriptor
An immutable descriptor of a call site. It is an immutable object that contains all the information about a call site: the class performing the lookups, the name of the method being invoked, and the method signature. The library has a default {@link CallSiteDescriptorFactory} for descriptors that you can use, or you can create your owndescriptor classes, especially if you need to add further information (values passed in additional parameters to the bootstrap method) to them. Call site descriptors are used in this library in place of passing a real call site to guarding linkers so they aren't tempted to directly manipulate the call sites. The constructors of built-in {@link RelinkableCallSite} implementations all need a call site descriptor. Even if you create your own call sitedescriptors consider using {@link CallSiteDescriptorFactory#tokenizeName(String)} in your implementation. @author Attila Szegedi
org.dynalang.dynalink.linker.CallSiteDescriptor
org.perl6.nqp.runtime.CallSiteDescriptor
Contains the statically known details of a call site. These are shared rather than being one for every single callsite in the code.

Examples of org.dynalang.dynalink.CallSiteDescriptor

    }


    @Override
    public GuardedInvocation getGuardedInvocation(LinkRequest request, final LinkerServices linkerServices)
            throws Exception {
        final CallSiteDescriptor callSiteDescriptor = request.getCallSiteDescriptor();
        final int l = callSiteDescriptor.getNameTokenCount();
        // All names conforming to the dynalang MOP should have at least two tokens, the first one being "dyn"
        if(l < 2 || "dyn" != callSiteDescriptor.getNameToken(CallSiteDescriptor.SCHEME)) {
            return null;
        }


        final Object receiver = request.getReceiver();
        if(receiver == null) {

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Examples of org.dynalang.dynalink.CallSiteDescriptor

    @Override
    public GuardedInvocation getGuardedInvocation(LinkRequest request, final LinkerServices linkerServices)
            throws Exception {
        final LinkRequest ncrequest = request.withoutRuntimeContext();
        // BeansLinker already checked that the name is at least 2 elements long and the first element is "dyn".
        final CallSiteDescriptor callSiteDescriptor = ncrequest.getCallSiteDescriptor();
        final String op = callSiteDescriptor.getNameToken(CallSiteDescriptor.OPERATOR);
        // Either dyn:callMethod:name(this[,args]) or dyn:callMethod(this,name[,args]).
        if("callMethod" == op) {
            return getCallPropWithThis(callSiteDescriptor, linkerServices);
        }
        List<String> operations = CallSiteDescriptorFactory.tokenizeOperators(callSiteDescriptor);

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Examples of org.dynalang.dynalink.CallSiteDescriptor

        testEarlyBoundArrayLengthGetter(arrayClass, "getLength", true);
    }


    private static void testEarlyBoundArrayLengthGetter(Class<?> arrayClass, String op, boolean early) throws Throwable {
        final BeansLinker bl = new BeansLinker();
        final CallSiteDescriptor csd =
                createCallSiteDescriptor("dyn:" + op, MethodType.methodType(int.class, arrayClass));
        final Object array = Array.newInstance(arrayClass.getComponentType(), 2);
        final GuardedInvocation inv = getGuardedInvocation(bl, csd, array);
        if(early) {
            // early bound, as call site guarantees we'll pass an array
            assertNull(inv.getGuard());
        }
        final MethodHandle mh = inv.getInvocation();
        assertNotNull(mh);
        assertEquals(csd.getMethodType(), mh.type());
        assertEquals(2, mh.invokeWithArguments(array));
    }

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Examples of org.dynalang.dynalink.CallSiteDescriptor

        testArrayLengthPropertyGetter(String[].class);
    }


    public void testEarlyBoundCollectionLengthGetter() throws Throwable {
        final BeansLinker bl = new BeansLinker();
        final CallSiteDescriptor csd =
                createCallSiteDescriptor("dyn:getLength", MethodType.methodType(int.class, List.class));
        final GuardedInvocation inv = getGuardedInvocation(bl, csd, Collections.EMPTY_LIST);
        assertNull(inv.getGuard());
        final MethodHandle mh = inv.getInvocation();
        assertNotNull(mh);
        assertEquals(csd.getMethodType(), mh.type());
        assertEquals(0, mh.invokeWithArguments(new Object[] { Collections.EMPTY_LIST }));
        assertEquals(2, mh.invokeWithArguments(new Object[] { Arrays.asList(new Object[] { "a", "b" }) }));
    }

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Examples of org.dynalang.dynalink.CallSiteDescriptor

        assertEquals(2, mh.invokeWithArguments(new Object[] { Arrays.asList(new Object[] { "a", "b" }) }));
    }


    public void testEarlyBoundMapLengthGetter() throws Throwable {
        final BeansLinker bl = new BeansLinker();
        final CallSiteDescriptor csd =
                createCallSiteDescriptor("dyn:getLength", MethodType.methodType(int.class, Map.class));
        final GuardedInvocation inv = getGuardedInvocation(bl, csd, Collections.EMPTY_MAP);
        assertNull(inv.getGuard());
        final MethodHandle mh = inv.getInvocation();
        assertNotNull(mh);
        assertEquals(csd.getMethodType(), mh.type());
        assertEquals(0, mh.invokeWithArguments(Collections.EMPTY_MAP));
        assertEquals(1, mh.invokeWithArguments(Collections.singletonMap("a", "b")));
    }

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Examples of org.dynalang.dynalink.CallSiteDescriptor


    static CallSiteDescriptor getCanonicalPublicDescriptor(final CallSiteDescriptor desc) {
        synchronized(publicDescs) {
            final WeakReference<CallSiteDescriptor> ref = publicDescs.get(desc);
            if(ref != null) {
                final CallSiteDescriptor canonical = ref.get();
                if(canonical != null) {
                    return canonical;
                }
            }
            publicDescs.put(desc, new WeakReference<>(desc));

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Examples of org.dynalang.dynalink.CallSiteDescriptor

                throws Exception {
            final GuardedInvocation gi = super.getGuardedInvocation(request, linkerServices);
            if(gi != null) {
                return gi;
            }
            final CallSiteDescriptor desc = request.getCallSiteDescriptor();
            final String op = desc.getNameToken(CallSiteDescriptor.OPERATOR);
            if("new" == op && constructor != null) {
                final MethodHandle ctorInvocation = constructor.getInvocation(desc, linkerServices);
                if(ctorInvocation != null) {
                    return new GuardedInvocation(ctorInvocation, getClassGuard(desc.getMethodType()));
                }
            }
            return null;
        }

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Examples of org.dynalang.dynalink.CallSiteDescriptor

    public GuardedInvocation getGuardedInvocation(LinkRequest linkRequest, LinkerServices linkerServices) {
        final Object receiver = linkRequest.getReceiver();
        if(!(receiver instanceof DynamicMethod)) {
            return null;
        }
        final CallSiteDescriptor desc = linkRequest.getCallSiteDescriptor();
        if(desc.getNameTokenCount() != 2 && desc.getNameToken(CallSiteDescriptor.SCHEME) != "dyn") {
            return null;
        }
        final String operator = desc.getNameToken(CallSiteDescriptor.OPERATOR);
        if(operator == "call") {
            final MethodHandle invocation = ((DynamicMethod)receiver).getInvocation(
                    CallSiteDescriptorFactory.dropParameterTypes(desc, 0, 1), linkerServices);
            if(invocation == null) {
                return null;
            }
            return new GuardedInvocation(MethodHandles.dropArguments(invocation, 0,
                    desc.getMethodType().parameterType(0)), Guards.getIdentityGuard(receiver));
        }
        return null;
    }

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Examples of org.dynalang.dynalink.CallSiteDescriptor

     */
    public void testPrintLn() throws Throwable {
        final BeansLinker linker = new BeansLinker();
        final LinkerServices linkerServices = LinkerServicesFactory.getLinkerServices(linker);
        final Object out = System.out;
        final CallSiteDescriptor desc = CallSiteDescriptorFactory.create(MethodHandles.publicLookup(),
                "dyn:callMethod:println", MethodType.methodType(Object.class, Object.class, Object.class));
        final LinkRequest req = new LinkRequestImpl(desc, false, out, "helloWorld");
        linker.getGuardedInvocation(req, linkerServices).getInvocation().invokeWithArguments(out, "helloWorld");
    }

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Examples of org.dynalang.dynalink.linker.CallSiteDescriptor

    }


    private static Object invokeDynamically(RelinkableCallSite callSite,
            Object[] args) throws Throwable {
        final Class<?> receiverClass = args[0].getClass();
        final CallSiteDescriptor descriptor = callSite.getCallSiteDescriptor();
        final Class<?>[] signature =
                descriptor.getMethodType().parameterArray();
        final Class<?>[] reflectSignature = new Class<?>[signature.length - 1];
        System.arraycopy(signature, 1, reflectSignature, 0,
                reflectSignature.length);
        final Method m =
                receiverClass.getMethod(descriptor.getNameToken(0), reflectSignature);
        final MethodHandle unreflected = MethodHandles.lookup().unreflect(m);
        return unreflected.invokeWithArguments(args);
    }

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