com.fasterxml.jackson.databind.JavaType#getRawClass ( )源码实例Demo

@Override
public boolean useForType(JavaType type) {
	Class<?> clazz = type.getRawClass();
	// Note: This does not work well with generics defined at or above the same scope as the call
	// to marshal or unmarshal. As a result, only use such generics there when dealing with a primitive
	// type or registered class, as these will cope with the idResolver.

	// We can lookup the class in the registry, for marshalling and unmarshalling.
	Boolean registryHasClass = registry.isClass(clazz);

	// We only ever declare as object if we intend to use one of our own classes (or a primitive).
	Boolean isObject = (Object.class.equals(clazz));

	// Also include abstract classes and interfaces as these are always defined with a type id. This
	// is not the case for container types, however, so these are excluded.
	Boolean isAbstract = type.isAbstract();
	Boolean isInterface = type.isInterface();
	Boolean isNotContainer = !type.isContainerType();

	// Primitive types are considered abstract, so exclude these as well.
	Boolean isNotPrimitive = !type.isPrimitive();

	return registryHasClass || ((isObject || isAbstract || isInterface) && isNotContainer && isNotPrimitive);
}
 

/**
 * Method similar to {@link #constructSpecializedType}, but that creates a
 * less-specific type of given type. Usually this is as simple as simply
 * finding super-type with type erasure of <code>superClass</code>, but
 * there may be need for some additional work-arounds.
 *
 * @param superClass
 *
 * @since 2.7
 */
public JavaType constructGeneralizedType(JavaType baseType, Class<?> superClass)
{
    // simple optimization to avoid costly introspection if type-erased type does NOT differ
    final Class<?> rawBase = baseType.getRawClass();
    if (rawBase == superClass) {
        return baseType;
    }
    JavaType superType = baseType.findSuperType(superClass);
    if (superType == null) {
        // Most likely, caller did not verify sub/super-type relationship
        if (!superClass.isAssignableFrom(rawBase)) {
            throw new IllegalArgumentException(String.format(
                    "Class %s not a super-type of %s", superClass.getName(), baseType));
        }
        // 01-Nov-2015, tatu: Should never happen, but ch
        throw new IllegalArgumentException(String.format(
                "Internal error: class %s not included as super-type for %s",
                superClass.getName(), baseType));
    }
    return superType;
}
 

public static Type java2Type(JavaType java) {
    Type type = null;
    if (java.isArrayType()) {
        // 数组类型
        type = java.getRawClass();
    } else if (java.hasGenericTypes()) {
        // 泛型类型
        List<JavaType> javas = java.getBindings().getTypeParameters();
        Type[] generics = new Type[javas.size()];
        int index = 0;
        for (JavaType term : javas) {
            generics[index++] = java2Type(term);
        }
        Class<?> clazz = java.getRawClass();
        type = TypeUtility.parameterize(clazz, generics);
    } else {
        type = java.getRawClass();
    }
    return type;
}
 

@Override
public JavaType modifyType(JavaType type, Type jdkType, TypeBindings bindings, TypeFactory typeFactory)
{
    if (type.isReferenceType() || type.isContainerType()) {
        return type;
    }

    final Class<?> raw = type.getRawClass();
    // First: make Multimaps look more Map-like
    if (raw == Multimap.class) {
        return MapLikeType.upgradeFrom(type,
                        type.containedTypeOrUnknown(0),
                        type.containedTypeOrUnknown(1));
    }
    if (raw == Optional.class) {
        return ReferenceType.upgradeFrom(type, type.containedTypeOrUnknown(0));
    }
    return type;
}
 

@Override
public JsonSerializer<Object> createSerializer(SerializerProvider prov, JavaType type) throws JsonMappingException {
	if (type.getRawClass() == TestBeanSimple.class) {
		return new TestBeanSimpleSerializer();
	}
	else {
		return super.createSerializer(prov, type);
	}
}
 

@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
    // Check that it's a JSON-RPC method
    MethodMetadata methodMetadata = classMetadata.getMethods().get(method);
    if (methodMetadata == null) {
        throw new IllegalStateException("Method '" + method.getName() + "' is not JSON-RPC available");
    }

    // Get method name (annotation or the actual name), params and id generator
    String methodName = methodMetadata.getName();
    JsonNode params = getParams(methodMetadata, args, getParamsType(classMetadata, methodMetadata));
    IdGenerator<?> idGenerator = userIdGenerator != null ? userIdGenerator : classMetadata.getIdGenerator();

    //  Construct a request
    ValueNode id = new POJONode(idGenerator.generate());
    String textResponse = execute(request(id, methodName, params));

    // Parse a response
    JsonNode responseNode = mapper.readTree(textResponse);
    JsonNode result = responseNode.get(RESULT);
    JsonNode error = responseNode.get(ERROR);
    if (result != null) {
        JavaType returnType = mapper.getTypeFactory().constructType(method.getGenericReturnType());
        if (returnType.getRawClass() == void.class) {
            return null;
        }
        return mapper.convertValue(result, returnType);
    } else {
        ErrorMessage errorMessage = mapper.treeToValue(error, ErrorMessage.class);
        throw new JsonRpcException(errorMessage);
    }
}
 

/**
 * NOTE: should not be called for generic types.
 */
public Class<?> materializeRawType(MapperConfig<?> config, AnnotatedClass typeDef)
{
    final JavaType type = typeDef.getType();

    Class<?> rawType = type.getRawClass();
    String newName = _defaultPackage+rawType.getName();
    BeanBuilder builder = BeanBuilder.construct(config, type, typeDef);
    byte[] bytecode = builder.implement(isEnabled(Feature.FAIL_ON_UNMATERIALIZED_METHOD)).build(newName);
    return _classLoader.loadAndResolve(newName, bytecode, rawType);
}
 

AnnotatedClassResolver(MapperConfig<?> config, JavaType type, MixInResolver r) {
    _config = config;
    _type = type;
    _class = type.getRawClass();
    _mixInResolver = r;
    _bindings = type.getBindings();
    _intr = config.isAnnotationProcessingEnabled()
            ? config.getAnnotationIntrospector() : null;
    _primaryMixin = _config.findMixInClassFor(_class);
}
 

@Override
public Schema resolve(AnnotatedType type, ModelConverterContext context, Iterator<ModelConverter> chain) {
	if (type.isSchemaProperty()) {
		JavaType javaType = Json.mapper().constructType(type.getType());
		Class<?> cls = javaType.getRawClass();
		if (AbstractRequestBuilder.isRequestTypeToIgnore(cls))
			return null;
	}
	return (chain.hasNext()) ? chain.next().resolve(type, context, chain) : null;
}
 

protected boolean _suitableType(JavaType type)
{
    // Future plans may include calling of this method for all kinds of abstract types.
    // So as simple precaution, let's limit kinds of types we will try materialize
    // implementations for.
    if (type.isContainerType() || type.isReferenceType()
            || type.isEnumType() || type.isPrimitive()) {
        return false;
    }
    Class<?> cls = type.getRawClass();
    if ((cls == Number.class)
            // 22-Jun-2016, tatu: As per [#12], avoid these too
            || (cls == Date.class) || (cls == Calendar.class)
            || (cls == CharSequence.class) || (cls == Iterable.class) || (cls == Iterator.class)
            // 06-Feb-2019, tatu: [modules-base#74] and:
            || (cls == java.io.Serializable.class)
    ) {
        return false;
    }

    // Fail on non-public classes, since we can't easily force  access to such
    // classes (unless we tried to generate impl classes in same package)
    if (!Modifier.isPublic(cls.getModifiers())) {
        if (isEnabled(Feature.FAIL_ON_NON_PUBLIC_TYPES)) {
            throw new IllegalArgumentException("Can not materialize implementation of "+cls+" since it is not public ");
        }
        return false;
    }
    return true;
}
 

@SuppressWarnings("unchecked")
public MessageWriteSchema(ProtoMapper protoMapper, Message message, JavaType javaType) {
  this.protoMapper = protoMapper;
  this.message = message;
  this.javaType = javaType;
  this.mainPojoCls = (Class<T>) javaType.getRawClass();
}
 

@Override
public JavaType modifyType(JavaType type, Type jdkType, TypeBindings bindings, TypeFactory typeFactory)
{
    final Class<?> raw = type.getRawClass();
    if (Seq.class.isAssignableFrom(raw) && CharSeq.class != raw) {
        return CollectionLikeType.upgradeFrom(type, type.containedTypeOrUnknown(0));
    }
    if (Set.class.isAssignableFrom(raw)) {
        return CollectionLikeType.upgradeFrom(type, type.containedTypeOrUnknown(0));
    }
    if (PriorityQueue.class.isAssignableFrom(raw)) {
        return CollectionLikeType.upgradeFrom(type, type.containedTypeOrUnknown(0));
    }
    if (Map.class.isAssignableFrom(raw)) {
        return MapLikeType.upgradeFrom(type, type.containedTypeOrUnknown(0), type.containedTypeOrUnknown(1));
    }
    if (Multimap.class.isAssignableFrom(raw)) {
        return MapLikeType.upgradeFrom(type, type.containedTypeOrUnknown(0), type.containedTypeOrUnknown(1));
    }
    if (Lazy.class.isAssignableFrom(raw)) {
        return ReferenceType.upgradeFrom(type, type.containedTypeOrUnknown(0));
    }
    if (Option.class.isAssignableFrom(raw)) {
        return ReferenceType.upgradeFrom(type, type.containedTypeOrUnknown(0));
    }
    return type;
}
 

@Override
public JsonSerializer<Object> createSerializer(SerializerProvider prov, JavaType type) throws JsonMappingException {
	if (type.getRawClass() == TestBeanSimple.class) {
		return new TestBeanSimpleSerializer();
	}
	else {
		return super.createSerializer(prov, type);
	}
}
 

@Override
@Nullable
public JsonDeserializer<?> findBeanDeserializer(
    JavaType type, DeserializationConfig config, BeanDescription beanDesc) {
  if (Message.class.isAssignableFrom(type.getRawClass())) {
    return new MessageDeserializer(type.getRawClass());
  }
  return null;
}
 

private Map<String,FieldBuilder> _findFields(TypeResolutionContext tc,
        JavaType type, Map<String,FieldBuilder> fields)
{
    // First, a quick test: we only care for regular classes (not interfaces,
    //primitive types etc), except for Object.class. A simple check to rule out
    // other cases is to see if there is a super class or not.
    JavaType parent = type.getSuperClass();
    if (parent == null) {
        return fields;
    }
    final Class<?> cls = type.getRawClass();
    // Let's add super-class' fields first, then ours.
    fields = _findFields(new TypeResolutionContext.Basic(_typeFactory, parent.getBindings()),
            parent, fields);
    for (Field f : ClassUtil.getDeclaredFields(cls)) {
        // static fields not included (transients are at this point, filtered out later)
        if (!_isIncludableField(f)) {
            continue;
        }
        // Ok now: we can (and need) not filter out ignorable fields at this point; partly
        // because mix-ins haven't been added, and partly because logic can be done
        // when determining get/settability of the field.
        if (fields == null) {
            fields = new LinkedHashMap<>();
        }
        FieldBuilder b = new FieldBuilder(tc, f);
        if (_intr != null) {
            b.annotations = collectAnnotations(b.annotations, f.getDeclaredAnnotations());
        }
        fields.put(f.getName(), b);
    }
    // And then... any mix-in overrides?
    if (_mixInResolver != null) {
        Class<?> mixin = _mixInResolver.findMixInClassFor(cls);
        if (mixin != null) {
            _addFieldMixIns(mixin, cls, fields);
        }
    }
    return fields;
}
 

public Referring(UnresolvedForwardReference ref, JavaType beanType) {
    _reference = ref;
    _beanType = beanType.getRawClass();
}
 

@Override
public JsonSerializer<?> findSerializer(SerializationConfig config, JavaType type, BeanDescription beanDesc) {

  if (Tuple1.class==type.getRawClass()) {
    return new Tuple1Serializer();
  }
  if (Tuple2.class==type.getRawClass()) {
    return new Tuple2Serializer();
  }
  if (Tuple3.class==type.getRawClass()) {
    return new Tuple3Serializer();
  }
  if (Tuple4.class==type.getRawClass()) {
    return new Tuple4Serializer();
  }
  if (Tuple5.class==type.getRawClass()) {
    return new Tuple5Serializer();
  }
  if (Tuple6.class==type.getRawClass()) {
    return new Tuple6Serializer();
  }
  if (Tuple7.class==type.getRawClass()) {
    return new Tuple7Serializer();
  }
  if (Tuple8.class==type.getRawClass()) {
    return new Tuple8Serializer();
  }
  if(PersistentMap.class.isAssignableFrom(type.getRawClass())) {
    return new PersistentMapSerializer();
  }

  if (Either.class.isAssignableFrom(type.getRawClass())) {
    return new Sealed2Serializer();
  }

  if (Sealed2.class.isAssignableFrom(type.getRawClass())) {
    return new Sealed2Serializer();
  }
  if (Sealed3.class.isAssignableFrom(type.getRawClass())) {
    return new Sealed3Serializer();
  }
  if (Sealed4.class.isAssignableFrom(type.getRawClass())) {
    return new Sealed4Serializer();
  }
  if (Sealed5.class.isAssignableFrom(type.getRawClass())) {
    return new Sealed5Serializer();
  }
  return super.findSerializer(config, type, beanDesc);
}
 

public void validateSubType(DeserializationContext ctxt, JavaType type,
        BeanDescription beanDesc) throws JsonMappingException
{
    // There are certain nasty classes that could cause problems, mostly
    // via default typing -- catch them here.
    final Class<?> raw = type.getRawClass();
    String full = raw.getName();

    main_check:
    do {
        if (_cfgIllegalClassNames.contains(full)) {
            break;
        }

        // 18-Dec-2017, tatu: As per [databind#1855], need bit more sophisticated handling
        //    for some Spring framework types
        // 05-Jan-2017, tatu: ... also, only applies to classes, not interfaces
        if (raw.isInterface()) {
            ;
        } else if (full.startsWith(PREFIX_SPRING)) {
            for (Class<?> cls = raw; (cls != null) && (cls != Object.class); cls = cls.getSuperclass()){
                String name = cls.getSimpleName();
                // looking for "AbstractBeanFactoryPointcutAdvisor" but no point to allow any is there?
                if ("AbstractPointcutAdvisor".equals(name)
                        // ditto  for "FileSystemXmlApplicationContext": block all ApplicationContexts
                        || "AbstractApplicationContext".equals(name)) {
                    break main_check;
                }
            }
        } else if (full.startsWith(PREFIX_C3P0)) {
            // [databind#1737]; more 3rd party
            // s.add("com.mchange.v2.c3p0.JndiRefForwardingDataSource");
            // s.add("com.mchange.v2.c3p0.WrapperConnectionPoolDataSource");
            // [databind#1931]; more 3rd party
            // com.mchange.v2.c3p0.ComboPooledDataSource
            // com.mchange.v2.c3p0.debug.AfterCloseLoggingComboPooledDataSource 
            if (full.endsWith("DataSource")) {
                break main_check;
            }
        }
        return;
    } while (false);

    ctxt.reportBadTypeDefinition(beanDesc,
            "Illegal type (%s) to deserialize: prevented for security reasons", full);
}
 

@Override
public Schema resolve(AnnotatedType annotatedType, ModelConverterContext context, Iterator<ModelConverter> next)
{
    JavaType classType = TypeFactory.defaultInstance().constructType(annotatedType.getType());
    Class<?> rawClass = classType.getRawClass();
    JavaType resolvedType = classType;

    if ((rawClass != null) &&!resolvedType.isPrimitive())
    {
        if (rawClass.isAssignableFrom(ServerResponse.class))
        {
            resolvedType = classType.containedType(0);
        }
        else if (rawClass.isAssignableFrom(CompletableFuture.class))
        {
            Class<?> futureCls = classType.containedType(0).getRawClass();

            if (futureCls.isAssignableFrom(ServerResponse.class))
            {
                final JavaType futureType = TypeFactory.defaultInstance().constructType(classType.containedType(0));

                resolvedType = futureType.containedType(0);
            }
            else
            {
                resolvedType = classType.containedType(0);
            }
        }

        if (resolvedType != null)
        {
            if (resolvedType.getTypeName().contains("java.lang.Void"))
            {
                resolvedType = TypeFactory.defaultInstance().constructFromCanonical(Void.class.getName());
            }
            else if (resolvedType.getTypeName().contains("Optional"))
            {
                if (resolvedType.getTypeName().contains("java.nio.file.Path"))
                {
                    resolvedType = TypeFactory.defaultInstance().constructParametricType(Optional.class, File.class);
                }

                if (resolvedType.getTypeName().contains("ByteBuffer"))
                {
                    resolvedType = TypeFactory.defaultInstance().constructParametricType(Optional.class, File.class);
                }
            }
            else
            {
                if (resolvedType.getTypeName().contains("java.nio.file.Path"))
                {
                    resolvedType = TypeFactory.defaultInstance().constructFromCanonical(File.class.getName());
                }

                if (resolvedType.getTypeName().contains("ByteBuffer"))
                {
                    resolvedType = TypeFactory.defaultInstance().constructFromCanonical(File.class.getName());
                }
            }

            annotatedType.setType(resolvedType);

        }
    }

    try {

        return super.resolve(annotatedType, context, next);

    } catch (Exception e) {

        log.error("Error processing " + annotatedType + " " + classType + " " + annotatedType.getName(), e);

        return null;
    }
}
 

/**
 * Is concrete class boolean.
 *
 * @param type the type
 * @return the boolean
 */
private boolean isConcreteClass(AnnotatedType type) {
	JavaType javaType = Json.mapper().constructType(type.getType());
	Class<?> clazz = javaType.getRawClass();
	return !Modifier.isAbstract(clazz.getModifiers()) && !clazz.isInterface();
}