/**
   * Adapts the source object to a view object.
   *
   * @param mapper An action that is invoked for each source object in the graph that is to be
   *     adapted. The action can influence how the source object is adapted via the provided {@link
   *     SourceObjectMapping}.
   */
  public <T, S> T adapt(
      Class<T> targetType, S sourceObject, Action<? super SourceObjectMapping> mapper) {
    if (sourceObject == null) {
      return null;
    }
    Class<? extends T> wrapperType = targetTypeProvider.getTargetType(targetType, sourceObject);
    DefaultSourceObjectMapping mapping =
        new DefaultSourceObjectMapping(sourceObject, targetType, wrapperType);
    mapper.execute(mapping);
    wrapperType = mapping.wrapperType.asSubclass(targetType);
    if (wrapperType.isInstance(sourceObject)) {
      return wrapperType.cast(sourceObject);
    }
    if (targetType.isEnum()) {
      return adaptToEnum(targetType, sourceObject);
    }

    MixInMethodInvoker mixInMethodInvoker = null;
    if (mapping.mixInType != null) {
      mixInMethodInvoker =
          new MixInMethodInvoker(
              mapping.mixInType, new AdaptingMethodInvoker(mapper, new ReflectionMethodInvoker()));
    }
    MethodInvoker overrideInvoker = chainInvokers(mixInMethodInvoker, mapping.overrideInvoker);
    Object proxy =
        Proxy.newProxyInstance(
            wrapperType.getClassLoader(),
            new Class<?>[] {wrapperType},
            new InvocationHandlerImpl(sourceObject, overrideInvoker, mapper));
    if (mixInMethodInvoker != null) {
      mixInMethodInvoker.setProxy(proxy);
    }
    return wrapperType.cast(proxy);
  }
 private static <T> T getParamXPath(
     final Class<T> pClass, final String pXpath, final CompactFragment pBody) throws XmlException {
   // TODO Avoid JAXB where possible, use XMLDeserializer instead
   final boolean string = CharSequence.class.isAssignableFrom(pClass);
   Node match;
   DocumentFragment fragment =
       DomUtil.childrenToDocumentFragment(XMLFragmentStreamReader.from(pBody));
   for (Node n = fragment.getFirstChild(); n != null; n = n.getNextSibling()) {
     match = xpathMatch(n, pXpath);
     if (match != null) {
       if (!string) {
         XmlDeserializer deserializer = pClass.getAnnotation(XmlDeserializer.class);
         if (deserializer != null) {
           try {
             XmlDeserializerFactory<?> factory = deserializer.value().newInstance();
             factory.deserialize(XmlStreaming.newReader(new DOMSource(n)));
           } catch (InstantiationException | IllegalAccessException e) {
             throw new RuntimeException(e);
           }
         } else {
           return JAXB.unmarshal(new DOMSource(match), pClass);
         }
       } else {
         return pClass.cast(nodeToString(match));
       }
     }
   }
   return null;
 }
Esempio n. 3
0
 @Deprecated
 public <T extends Widget> T findchild(Class<T> cl) {
   for (Widget wdg = child; wdg != null; wdg = wdg.next) {
     if (cl.isInstance(wdg)) return (cl.cast(wdg));
     T ret = wdg.findchild(cl);
     if (ret != null) return (ret);
   }
   return (null);
 }
Esempio n. 4
0
 public <T> T getInterface(Object thiz, Class<T> iface) throws ScriptException {
   if (iface == null || !iface.isInterface()) {
     throw new IllegalArgumentException("interface Class expected");
   }
   AccessControlContext accCtxt = AccessController.getContext();
   return iface.cast(
       Proxy.newProxyInstance(
           iface.getClassLoader(),
           new Class[] {iface},
           new InterfaceImplementorInvocationHandler(thiz, accCtxt)));
 }
Esempio n. 5
0
 public <T> T nodeByTypeElement(Class<T> baseType) {
   int len = children.size();
   for (int i = 0; i < len; i++) {
     Child child = children.get(i);
     if (child instanceof NodeChild) {
       NodeChild nc = (NodeChild) child;
       if (model.elements.containsKey(nc.name)) continue; // match with named
       if (baseType.isAssignableFrom(nc.dom.getImplementationClass()))
         return baseType.cast(nc.dom.get());
     }
   }
   return null;
 }
 private static <T, S> T adaptToEnum(Class<T> targetType, S sourceObject) {
   try {
     String literal;
     if (sourceObject instanceof Enum) {
       literal = ((Enum<?>) sourceObject).name();
     } else if (sourceObject instanceof String) {
       literal = (String) sourceObject;
     } else {
       literal = sourceObject.toString();
     }
     NotationParser<String, T> parser =
         new NotationConverterToNotationParserAdapter<String, T>(
             new EnumFromCharSequenceNotationParser(targetType));
     T parsedLiteral = parser.parseNotation(literal);
     return targetType.cast(parsedLiteral);
   } catch (TypeConversionException e) {
     throw new IllegalArgumentException(
         String.format(
             "Can't convert '%s' to enum type '%s'", sourceObject, targetType.getSimpleName()),
         e);
   }
 }
Esempio n. 7
0
  // Other notes to implementors:
  // <p>
  // No stable mapping is promised between the single-method interface and
  // the implementation class C.  Over time, several implementation
  // classes might be used for the same type.
  // <p>
  // If the implementation is able
  // to prove that a wrapper of the required type
  // has already been created for a given
  // method handle, or for another method handle with the
  // same behavior, the implementation may return that wrapper in place of
  // a new wrapper.
  // <p>
  // This method is designed to apply to common use cases
  // where a single method handle must interoperate with
  // an interface that implements a function-like
  // API.  Additional variations, such as single-abstract-method classes with
  // private constructors, or interfaces with multiple but related
  // entry points, must be covered by hand-written or automatically
  // generated adapter classes.
  //
  public static <T> T asInterfaceInstance(final Class<T> intfc, final MethodHandle target) {
    if (!intfc.isInterface() || !Modifier.isPublic(intfc.getModifiers()))
      throw new IllegalArgumentException("not a public interface: " + intfc.getName());
    final Method[] methods = getSingleNameMethods(intfc);
    if (methods == null)
      throw new IllegalArgumentException("not a single-method interface: " + intfc.getName());
    final MethodHandle[] vaTargets = new MethodHandle[methods.length];
    for (int i = 0; i < methods.length; i++) {
      Method sm = methods[i];
      MethodType smMT = MethodType.methodType(sm.getReturnType(), sm.getParameterTypes());
      MethodHandle checkTarget = target.asType(smMT); // make throw WMT
      checkTarget = checkTarget.asType(checkTarget.type().changeReturnType(Object.class));
      vaTargets[i] = checkTarget.asSpreader(Object[].class, smMT.parameterCount());
    }
    return intfc.cast(
        Proxy.newProxyInstance(
            intfc.getClassLoader(),
            new Class[] {intfc, WrapperInstance.class},
            new InvocationHandler() {
              private Object getArg(String name) {
                if ((Object) name == "getWrapperInstanceTarget") return target;
                if ((Object) name == "getWrapperInstanceType") return intfc;
                throw new AssertionError();
              }

              public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                for (int i = 0; i < methods.length; i++) {
                  if (method.equals(methods[i])) return vaTargets[i].invokeExact(args);
                }
                if (method.getDeclaringClass() == WrapperInstance.class)
                  return getArg(method.getName());
                if (isObjectMethod(method)) return callObjectMethod(this, method, args);
                throw new InternalError("bad proxy method: " + method);
              }
            }));
  }
Esempio n. 8
0
 public <T extends Widget> T getparent(Class<T> cl) {
   for (Widget w = this; w != null; w = w.parent) {
     if (cl.isInstance(w)) return (cl.cast(w));
   }
   return (null);
 }
Esempio n. 9
0
 /**
  * Creates a strongly-typed proxy to access values in this {@link Dom} object, by using the
  * specified interface type as the proxy type.
  */
 public <T extends ConfigBeanProxy> T createProxy(final Class<T> proxyType) {
   ConfigBeanProxy retVal = proxyCache.compute(proxyType);
   return proxyType.cast(retVal);
 }
Esempio n. 10
0
 /**
  * Assembles a bean from an XML file.
  *
  * @param <T> the expected object type
  * @param file the path to the XML file
  * @param type the expected object type
  * @return an object assembled from this XML file
  * @throws SAXException if the internal SAX parser fails
  * @throws IOException if any IO errors occur
  */
 public <T> T build(String file, Class<T> type) throws SAXException, IOException {
   _parser.parse(new File(file), this);
   return type.cast(getBean());
 }
Esempio n. 11
0
 /**
  * Assembles a bean from an XML stream.
  *
  * @param <T> the expected object type
  * @param stream the XML input stream
  * @param type the expected object type
  * @return an object assembled from this XML stream
  * @throws SAXException if the internal SAX parser fails
  * @throws IOException if any IO errors occur
  */
 public <T> T build(InputStream stream, Class<T> type) throws SAXException, IOException {
   _parser.parse(stream, this);
   return type.cast(getBean());
 }