Examples with Type java.lang.reflect.Type used on opensource projects

Example 31 with Type

use of java.lang.reflect.Type in project morphia by mongodb.

the class ReflectionUtils method getParameterizedClass.

/**
     * Get the class that parameterizes the Field supplied, at the index supplied (field can be parameterized with multiple param classes).
     *
     * @param field the field
     * @param index the index of the parameterizing class
     * @return the class that parameterizes the field, or null if field is not parameterized
     */
public static Class getParameterizedClass(final Field field, final int index) {
    if (field.getGenericType() instanceof ParameterizedType) {
        final ParameterizedType type = (ParameterizedType) field.getGenericType();
        if ((type.getActualTypeArguments() != null) && (type.getActualTypeArguments().length <= index)) {
            return null;
        }
        final Type paramType = type.getActualTypeArguments()[index];
        if (paramType instanceof GenericArrayType) {
            final Class arrayType = (Class) ((GenericArrayType) paramType).getGenericComponentType();
            return Array.newInstance(arrayType, 0).getClass();
        } else {
            if (paramType instanceof ParameterizedType) {
                final ParameterizedType paramPType = (ParameterizedType) paramType;
                return (Class) paramPType.getRawType();
            } else {
                if (paramType instanceof TypeVariable) {
                    // from the T/V/X
                    throw new MappingException("Generic Typed Class not supported:  <" + ((TypeVariable) paramType).getName() + "> = " + ((TypeVariable) paramType).getBounds()[0]);
                } else if (paramType instanceof Class) {
                    return (Class) paramType;
                } else {
                    throw new MappingException("Unknown type... pretty bad... call for help, wave your hands... yeah!");
                }
            }
        }
    }
    return getParameterizedClass(field.getType());
}

Example 32 with Type

use of java.lang.reflect.Type in project morphia by mongodb.

the class ReflectionUtils method getClass.

/**
     * Get the underlying class for a type, or null if the type is a variable type.
     *
     * @param type the type
     * @return the underlying class
     */
public static Class<?> getClass(final Type type) {
    if (type instanceof Class) {
        return (Class) type;
    } else if (type instanceof ParameterizedType) {
        return getClass(((ParameterizedType) type).getRawType());
    } else if (type instanceof GenericArrayType) {
        final Type componentType = ((GenericArrayType) type).getGenericComponentType();
        final Class<?> componentClass = getClass(componentType);
        if (componentClass != null) {
            return Array.newInstance(componentClass, 0).getClass();
        } else {
            LOG.debug("************ ReflectionUtils.getClass 1st else");
            LOG.debug("************ type = " + type);
            return null;
        }
    } else {
        LOG.debug("************ ReflectionUtils.getClass final else");
        LOG.debug("************ type = " + type);
        return null;
    }
}

Example 33 with Type

use of java.lang.reflect.Type in project jersey by jersey.

the class GenericMethodListTest method testGeneriInterfaceClasses.

@Test
public void testGeneriInterfaceClasses() {
    MethodList ml = new MethodList(IResource.class);
    Iterator<AnnotatedMethod> i = ml.iterator();
    assertTrue(i.hasNext());
    AnnotatedMethod am = i.next();
    Method m = am.getMethod();
    Type[] types = m.getGenericParameterTypes();
    assertTrue(types[0] instanceof TypeVariable);
    assertTrue(types[1] instanceof Class);
    assertTrue(types[2] instanceof TypeVariable);
}

Example 34 with Type

use of java.lang.reflect.Type in project jersey by jersey.

the class WebResourceFactory method invoke.

@Override
@SuppressWarnings("unchecked")
public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
    if (args == null && method.getName().equals("toString")) {
        return toString();
    }
    if (args == null && method.getName().equals("hashCode")) {
        //unique instance in the JVM, and no need to override
        return hashCode();
    }
    if (args != null && args.length == 1 && method.getName().equals("equals")) {
        //unique instance in the JVM, and no need to override
        return equals(args[0]);
    }
    // get the interface describing the resource
    final Class<?> proxyIfc = proxy.getClass().getInterfaces()[0];
    // response type
    final Class<?> responseType = method.getReturnType();
    // determine method name
    String httpMethod = getHttpMethodName(method);
    if (httpMethod == null) {
        for (final Annotation ann : method.getAnnotations()) {
            httpMethod = getHttpMethodName(ann.annotationType());
            if (httpMethod != null) {
                break;
            }
        }
    }
    // create a new UriBuilder appending the @Path attached to the method
    WebTarget newTarget = addPathFromAnnotation(method, target);
    if (httpMethod == null) {
        if (newTarget == target) {
            // no path annotation on the method -> fail
            throw new UnsupportedOperationException("Not a resource method.");
        } else if (!responseType.isInterface()) {
            // not interface - can't help here
            throw new UnsupportedOperationException("Return type not an interface");
        }
    }
    // process method params (build maps of (Path|Form|Cookie|Matrix|Header..)Params
    // and extract entity type
    final MultivaluedHashMap<String, Object> headers = new MultivaluedHashMap<String, Object>(this.headers);
    final LinkedList<Cookie> cookies = new LinkedList<>(this.cookies);
    final Form form = new Form();
    form.asMap().putAll(this.form.asMap());
    final Annotation[][] paramAnns = method.getParameterAnnotations();
    Object entity = null;
    Type entityType = null;
    for (int i = 0; i < paramAnns.length; i++) {
        final Map<Class, Annotation> anns = new HashMap<>();
        for (final Annotation ann : paramAnns[i]) {
            anns.put(ann.annotationType(), ann);
        }
        Annotation ann;
        Object value = args[i];
        if (!hasAnyParamAnnotation(anns)) {
            entityType = method.getGenericParameterTypes()[i];
            entity = value;
        } else {
            if (value == null && (ann = anns.get(DefaultValue.class)) != null) {
                value = ((DefaultValue) ann).value();
            }
            if (value != null) {
                if ((ann = anns.get(PathParam.class)) != null) {
                    newTarget = newTarget.resolveTemplate(((PathParam) ann).value(), value);
                } else if ((ann = anns.get((QueryParam.class))) != null) {
                    if (value instanceof Collection) {
                        newTarget = newTarget.queryParam(((QueryParam) ann).value(), convert((Collection) value));
                    } else {
                        newTarget = newTarget.queryParam(((QueryParam) ann).value(), value);
                    }
                } else if ((ann = anns.get((HeaderParam.class))) != null) {
                    if (value instanceof Collection) {
                        headers.addAll(((HeaderParam) ann).value(), convert((Collection) value));
                    } else {
                        headers.addAll(((HeaderParam) ann).value(), value);
                    }
                } else if ((ann = anns.get((CookieParam.class))) != null) {
                    final String name = ((CookieParam) ann).value();
                    Cookie c;
                    if (value instanceof Collection) {
                        for (final Object v : ((Collection) value)) {
                            if (!(v instanceof Cookie)) {
                                c = new Cookie(name, v.toString());
                            } else {
                                c = (Cookie) v;
                                if (!name.equals(((Cookie) v).getName())) {
                                    // is this the right thing to do? or should I fail? or ignore the difference?
                                    c = new Cookie(name, c.getValue(), c.getPath(), c.getDomain(), c.getVersion());
                                }
                            }
                            cookies.add(c);
                        }
                    } else {
                        if (!(value instanceof Cookie)) {
                            cookies.add(new Cookie(name, value.toString()));
                        } else {
                            c = (Cookie) value;
                            if (!name.equals(((Cookie) value).getName())) {
                                // is this the right thing to do? or should I fail? or ignore the difference?
                                cookies.add(new Cookie(name, c.getValue(), c.getPath(), c.getDomain(), c.getVersion()));
                            }
                        }
                    }
                } else if ((ann = anns.get((MatrixParam.class))) != null) {
                    if (value instanceof Collection) {
                        newTarget = newTarget.matrixParam(((MatrixParam) ann).value(), convert((Collection) value));
                    } else {
                        newTarget = newTarget.matrixParam(((MatrixParam) ann).value(), value);
                    }
                } else if ((ann = anns.get((FormParam.class))) != null) {
                    if (value instanceof Collection) {
                        for (final Object v : ((Collection) value)) {
                            form.param(((FormParam) ann).value(), v.toString());
                        }
                    } else {
                        form.param(((FormParam) ann).value(), value.toString());
                    }
                }
            }
        }
    }
    if (httpMethod == null) {
        // the method is a subresource locator
        return WebResourceFactory.newResource(responseType, newTarget, true, headers, cookies, form);
    }
    // accepted media types
    Produces produces = method.getAnnotation(Produces.class);
    if (produces == null) {
        produces = proxyIfc.getAnnotation(Produces.class);
    }
    final String[] accepts = (produces == null) ? EMPTY : produces.value();
    // determine content type
    String contentType = null;
    if (entity != null) {
        final List<Object> contentTypeEntries = headers.get(HttpHeaders.CONTENT_TYPE);
        if ((contentTypeEntries != null) && (!contentTypeEntries.isEmpty())) {
            contentType = contentTypeEntries.get(0).toString();
        } else {
            Consumes consumes = method.getAnnotation(Consumes.class);
            if (consumes == null) {
                consumes = proxyIfc.getAnnotation(Consumes.class);
            }
            if (consumes != null && consumes.value().length > 0) {
                contentType = consumes.value()[0];
            }
        }
    }
    Invocation.Builder builder = newTarget.request().headers(// this resets all headers so do this first
    headers).accept(// if @Produces is defined, propagate values into Accept header; empty array is NO-OP
    accepts);
    for (final Cookie c : cookies) {
        builder = builder.cookie(c);
    }
    final Object result;
    if (entity == null && !form.asMap().isEmpty()) {
        entity = form;
        contentType = MediaType.APPLICATION_FORM_URLENCODED;
    } else {
        if (contentType == null) {
            contentType = MediaType.APPLICATION_OCTET_STREAM;
        }
        if (!form.asMap().isEmpty()) {
            if (entity instanceof Form) {
                ((Form) entity).asMap().putAll(form.asMap());
            } else {
            // TODO: should at least log some warning here
            }
        }
    }
    final GenericType responseGenericType = new GenericType(method.getGenericReturnType());
    if (entity != null) {
        if (entityType instanceof ParameterizedType) {
            entity = new GenericEntity(entity, entityType);
        }
        result = builder.method(httpMethod, Entity.entity(entity, contentType), responseGenericType);
    } else {
        result = builder.method(httpMethod, responseGenericType);
    }
    return result;
}

Example 35 with Type

use of java.lang.reflect.Type in project jersey by jersey.

the class NaiveResourceMappingContext method buildMappings.

private void buildMappings() {
    if (mappings != null) {
        return;
    }
    mappings = new HashMap<>();
    erc.getResourceModel().accept(new ResourceModelVisitor() {

        Deque<PathPattern> stack = new LinkedList<>();

        private void processComponents(final ResourceModelComponent component) {
            final List<? extends ResourceModelComponent> components = component.getComponents();
            if (components != null) {
                for (final ResourceModelComponent rc : components) {
                    rc.accept(this);
                }
            }
        }

        @Override
        public void visitInvocable(final Invocable invocable) {
            processComponents(invocable);
        }

        @Override
        public void visitRuntimeResource(final RuntimeResource runtimeResource) {
            processComponents(runtimeResource);
        }

        @Override
        public void visitResourceModel(final ResourceModel resourceModel) {
            processComponents(resourceModel);
        }

        @Override
        public void visitResourceHandlerConstructor(final HandlerConstructor handlerConstructor) {
            processComponents(handlerConstructor);
        }

        @Override
        public void visitMethodHandler(final MethodHandler methodHandler) {
            processComponents(methodHandler);
        }

        @Override
        public void visitChildResource(final Resource resource) {
            visitResourceIntl(resource, false);
        }

        @Override
        public void visitResource(final Resource resource) {
            visitResourceIntl(resource, true);
        }

        private void visitResourceIntl(final Resource resource, final boolean isRoot) {
            try {
                stack.addLast(resource.getPathPattern());
                processComponents(resource);
                if (isRoot) {
                    Class likelyToBeRoot = null;
                    for (final Class next : resource.getHandlerClasses()) {
                        if (!(Inflector.class.isAssignableFrom(next))) {
                            likelyToBeRoot = next;
                        }
                    }
                    if (likelyToBeRoot != null) {
                        mappings.put(likelyToBeRoot, getMapping(getTemplate()));
                    }
                }
            } finally {
                stack.removeLast();
            }
        }

        @Override
        public void visitResourceMethod(final ResourceMethod resourceMethod) {
            if (resourceMethod.isExtended()) {
                return;
            }
            if (ResourceMethod.JaxrsType.SUB_RESOURCE_LOCATOR.equals(resourceMethod.getType())) {
                if (resourceMethod.getInvocable() != null) {
                    final Invocable i = resourceMethod.getInvocable();
                    final Type type = i.getResponseType();
                    final StringBuilder template = getTemplate();
                    mappings.put((Class) type, getMapping(template));
                    // Process sub resources ?
                    Resource.Builder builder = Resource.builder(i.getRawResponseType());
                    if (builder == null) {
                        // for example in the case the return type of the sub resource locator is Object
                        builder = Resource.builder().path(resourceMethod.getParent().getPath());
                    }
                    final Resource subResource = builder.build();
                    visitChildResource(subResource);
                }
            }
            processComponents(resourceMethod);
        }

        private StringBuilder getTemplate() {
            final StringBuilder template = new StringBuilder();
            for (final PathPattern pp : stack) {
                final String ppTemplate = pp.getTemplate().getTemplate();
                final int tlength = template.length();
                if (tlength > 0) {
                    if (template.charAt(tlength - 1) == '/') {
                        if (ppTemplate.startsWith("/")) {
                            template.append(ppTemplate, 1, ppTemplate.length());
                        } else {
                            template.append(ppTemplate);
                        }
                    } else {
                        if (ppTemplate.startsWith("/")) {
                            template.append(ppTemplate);
                        } else {
                            template.append("/");
                            template.append(ppTemplate);
                        }
                    }
                } else {
                    template.append(ppTemplate);
                }
            }
            return template;
        }
    });
}