io.micronaut.openapi.visitor.OpenApiControllerVisitor Maven / Gradle / Ivy
/*
* Copyright 2017-2018 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.openapi.visitor;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.databind.JsonNode;
import io.micronaut.core.annotation.AnnotationValue;
import io.micronaut.core.annotation.Experimental;
import io.micronaut.core.beans.BeanMap;
import io.micronaut.core.bind.annotation.Bindable;
import io.micronaut.core.naming.NameUtils;
import io.micronaut.core.util.CollectionUtils;
import io.micronaut.core.util.StringUtils;
import io.micronaut.http.HttpMethod;
import io.micronaut.http.HttpResponse;
import io.micronaut.http.MediaType;
import io.micronaut.http.annotation.*;
import io.micronaut.http.uri.UriMatchTemplate;
import io.micronaut.http.uri.UriMatchVariable;
import io.micronaut.inject.ast.*;
import io.micronaut.inject.visitor.*;
import io.micronaut.openapi.javadoc.JavadocDescription;
import io.micronaut.openapi.javadoc.JavadocParser;
import io.swagger.v3.oas.annotations.Hidden;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.callbacks.Callback;
import io.swagger.v3.oas.annotations.enums.ParameterIn;
import io.swagger.v3.oas.annotations.tags.Tag;
import io.swagger.v3.oas.models.Components;
import io.swagger.v3.oas.models.OpenAPI;
import io.swagger.v3.oas.models.PathItem;
import io.swagger.v3.oas.models.media.Content;
import io.swagger.v3.oas.models.media.ObjectSchema;
import io.swagger.v3.oas.models.media.Schema;
import io.swagger.v3.oas.models.parameters.Parameter;
import io.swagger.v3.oas.models.parameters.RequestBody;
import io.swagger.v3.oas.models.responses.ApiResponse;
import io.swagger.v3.oas.models.responses.ApiResponses;
import io.swagger.v3.oas.models.security.SecurityRequirement;
import io.swagger.v3.oas.models.servers.Server;
import javax.annotation.Nullable;
import java.io.IOException;
import java.lang.annotation.Annotation;
import java.util.*;
import java.util.stream.Collectors;
/**
* A {@link TypeElementVisitor} the builds the Swagger model from Micronaut controllers at compile time.
*
* @author graemerocher
* @since 1.0
*/
@Experimental
public class OpenApiControllerVisitor extends AbstractOpenApiVisitor implements TypeElementVisitor {
@Override
public void visitClass(ClassElement element, VisitorContext context) {
processSecuritySchemes(element, context);
}
@Override
public void visitMethod(MethodElement element, VisitorContext context) {
Optional> httpMethodOpt = element.getAnnotationTypeByStereotype(HttpMethodMapping.class);
if (element.isAnnotationPresent(Hidden.class)) {
return;
}
httpMethodOpt.ifPresent(httpMethodClass -> {
HttpMethod httpMethod = null;
try {
httpMethod = HttpMethod.valueOf(httpMethodClass.getSimpleName().toUpperCase(Locale.ENGLISH));
} catch (IllegalArgumentException e) {
// ignore
}
if (httpMethod == null) {
return;
}
UriMatchTemplate matchTemplate = UriMatchTemplate.of(element.getValue(Controller.class, String.class).orElse("/"));
matchTemplate = matchTemplate.nest(element.getValue(HttpMethodMapping.class, String.class).orElse("/"));
PathItem pathItem = resolvePathItem(context, matchTemplate);
OpenAPI openAPI = resolveOpenAPI(context);
final Optional> operationAnnotation = element.findAnnotation(Operation.class);
io.swagger.v3.oas.models.Operation swaggerOperation = operationAnnotation.flatMap(o -> {
JsonNode jsonNode = toJson(o.getValues(), context);
try {
return Optional.of(jsonMapper.treeToValue(jsonNode, io.swagger.v3.oas.models.Operation.class));
} catch (Exception e) {
context.warn("Error reading Swagger Operation for element [" + element + "]: " + e.getMessage(), element);
return Optional.empty();
}
}).orElse(new io.swagger.v3.oas.models.Operation());
readTags(element, swaggerOperation);
readSecurityRequirements(element, context, swaggerOperation);
readApiResponses(element, context, swaggerOperation);
readServers(element, context, swaggerOperation);
readCallbacks(element, context, swaggerOperation);
JavadocDescription javadocDescription = element.getDocumentation().map(s -> new JavadocParser().parse(s)).orElse(null);
if (javadocDescription != null && StringUtils.isEmpty(swaggerOperation.getDescription())) {
swaggerOperation.setDescription(javadocDescription.getMethodDescription());
}
setOperationOnPathItem(pathItem, swaggerOperation, httpMethod);
if (element.isAnnotationPresent(Deprecated.class)) {
swaggerOperation.setDeprecated(true);
}
if (StringUtils.isEmpty(swaggerOperation.getOperationId())) {
swaggerOperation.setOperationId(element.getName());
}
boolean permitsRequestBody = HttpMethod.permitsRequestBody(httpMethod);
List swaggerParameters = swaggerOperation.getParameters();
List pv = matchTemplate.getVariables();
Map pathVariables = new LinkedHashMap<>(pv.size()) ;
for (UriMatchVariable variable : pv) {
pathVariables.put(variable.getName(), variable);
}
String consumesMediaType = element.getValue(Consumes.class, String.class).orElse(MediaType.APPLICATION_JSON);
ApiResponses responses = swaggerOperation.getResponses();
if (responses == null) {
responses = new ApiResponses();
swaggerOperation.setResponses(responses);
ApiResponse okResponse = new ApiResponse();
if (javadocDescription != null) {
String returnDescription = javadocDescription.getReturnDescription();
okResponse.setDescription(returnDescription);
}
ClassElement returnType = element.getReturnType();
if (isResponseType(returnType)) {
returnType = returnType.getFirstTypeArgument().orElse(returnType);
}
if (returnType != null) {
String mediaType = element.getValue(Produces.class, String.class).orElse(MediaType.APPLICATION_JSON);
Content content = buildContent(element, returnType, mediaType, openAPI, context);
okResponse.setContent(content);
}
responses.put(ApiResponses.DEFAULT, okResponse);
}
boolean hasExistingParameters = CollectionUtils.isNotEmpty(swaggerParameters);
if (!hasExistingParameters) {
swaggerParameters = new ArrayList<>();
swaggerOperation.setParameters(swaggerParameters);
}
for (ParameterElement parameter : element.getParameters()) {
ClassElement parameterType = parameter.getType();
String parameterName = parameter.getName();
if (parameterType == null) {
continue;
}
if (parameter.isAnnotationPresent(Body.class)) {
if (permitsRequestBody && swaggerOperation.getRequestBody() == null) {
RequestBody requestBody = new RequestBody();
if (javadocDescription != null) {
CharSequence desc = javadocDescription.getParameters().get(parameterName);
if (desc != null) {
requestBody.setDescription(desc.toString());
}
}
requestBody.setRequired(!parameter.isAnnotationPresent(Nullable.class) && !parameterType.isAssignable(Optional.class));
Content content = buildContent(
parameter,
parameterType,
consumesMediaType,
openAPI, context
);
requestBody.setContent(content);
swaggerOperation.setRequestBody(requestBody);
}
continue;
}
if (hasExistingParameters) {
continue;
}
Parameter newParameter = null;
if (!parameter.hasStereotype(Bindable.class) && pathVariables.containsKey(parameterName)) {
UriMatchVariable var = pathVariables.get(parameterName);
newParameter = new Parameter();
newParameter.setIn(ParameterIn.PATH.toString());
final boolean exploded = var.isExploded();
if (exploded) {
newParameter.setExplode(exploded);
}
} else if (parameter.isAnnotationPresent(Header.class)) {
String headerName = parameter.getValue(Header.class, "name", String.class).orElseGet(() -> NameUtils.hyphenate(parameterName));
newParameter = new Parameter();
newParameter.setIn(ParameterIn.HEADER.toString());
newParameter.setName(headerName);
} else if (parameter.isAnnotationPresent(CookieValue.class)) {
String cookieName = parameter.getValue(CookieValue.class, String.class).orElse(parameterName);
newParameter = new Parameter();
newParameter.setIn(ParameterIn.COOKIE.toString());
newParameter.setName(cookieName);
} else if (parameter.isAnnotationPresent(QueryValue.class)) {
String queryVar = parameter.getValue(QueryValue.class, String.class).orElse(parameterName);
newParameter = new Parameter();
newParameter.setIn(ParameterIn.QUERY.toString());
newParameter.setName(queryVar);
}
if (parameter.isAnnotationPresent(io.swagger.v3.oas.annotations.Parameter.class)) {
AnnotationValue paramAnn = parameter.findAnnotation(io.swagger.v3.oas.annotations.Parameter.class).orElse(null);
if (paramAnn != null) {
Map paramValues = toValueMap(paramAnn.getValues(), context);
normalizeEnumValues(paramValues, Collections.singletonMap(
"in", ParameterIn.class
));
JsonNode jsonNode = jsonMapper.valueToTree(paramValues);
if (newParameter == null) {
try {
newParameter = jsonMapper.treeToValue(jsonNode, Parameter.class);
} catch (Exception e) {
context.warn("Error reading Swagger Parameter for element [" + parameter + "]: " + e.getMessage(), parameter);
}
} else {
try {
Parameter v = jsonMapper.treeToValue(jsonNode, Parameter.class);
if (v != null) {
// horrible hack because Swagger ParameterDeserializer breaks updating existing objects
BeanMap beanMap = BeanMap.of(v);
BeanMap target = BeanMap.of(newParameter);
for (CharSequence name : paramValues.keySet()) {
Object o = beanMap.get(name.toString());
target.put(name.toString(), o);
}
} else {
BeanMap target = BeanMap.of(newParameter);
for (CharSequence name : paramValues.keySet()) {
Object o = paramValues.get(name.toString());
try {
target.put(name.toString(), o);
} catch (Exception e) {
// ignore
}
}
}
} catch (IOException e) {
context.warn("Error reading Swagger Parameter for element [" + parameter + "]: " + e.getMessage(), parameter);
}
}
}
}
if (newParameter != null) {
if (StringUtils.isEmpty(newParameter.getName())) {
newParameter.setName(parameterName);
}
newParameter.setRequired(!parameter.isAnnotationPresent(Nullable.class));
// calc newParameter.setExplode();
if (javadocDescription != null) {
CharSequence desc = javadocDescription.getParameters().get(parameterName);
if (desc != null) {
newParameter.setDescription(desc.toString());
}
}
swaggerParameters.add(newParameter);
Schema schema = newParameter.getSchema();
if (schema == null) {
schema = resolveSchema(openAPI, parameter, parameterType, context, consumesMediaType);
}
if (schema != null) {
bindSchemaForElement(context, parameter, parameter.getType(), schema);
newParameter.setSchema(schema);
}
}
}
if (HttpMethod.requiresRequestBody(httpMethod) && swaggerOperation.getRequestBody() == null) {
List bodyParameters = Arrays.stream(element.getParameters()).filter(p -> !pathVariables.containsKey(p.getName()) && !p.isAnnotationPresent(Bindable.class)).collect(Collectors.toList());
if (!bodyParameters.isEmpty()) {
RequestBody requestBody = new RequestBody();
Content content = new Content();
io.swagger.v3.oas.models.media.MediaType mt = new io.swagger.v3.oas.models.media.MediaType();
ObjectSchema schema = new ObjectSchema();
for (ParameterElement parameter : bodyParameters) {
if (parameter.isAnnotationPresent(JsonIgnore.class) || parameter.isAnnotationPresent(Hidden.class)) {
continue;
}
Schema propertySchema = resolveSchema(openAPI, parameter, parameter.getType(), context, consumesMediaType);
processSchemaProperty(context, parameter, parameter.getType(), schema, propertySchema);
propertySchema.setNullable(parameter.isAnnotationPresent(Nullable.class));
if (javadocDescription != null && StringUtils.isEmpty(propertySchema.getDescription())) {
CharSequence doc = javadocDescription.getParameters().get(parameter.getName());
if (doc != null) {
propertySchema.setDescription(doc.toString());
}
}
}
mt.setSchema(schema);
content.addMediaType(consumesMediaType, mt);
requestBody.setContent(content);
requestBody.setRequired(true);
swaggerOperation.setRequestBody(requestBody);
}
}
});
}
private boolean isResponseType(ClassElement returnType) {
return returnType.isAssignable(HttpResponse.class) || returnType.isAssignable("org.springframework.http.HttpEntity");
}
private void setOperationOnPathItem(PathItem pathItem, io.swagger.v3.oas.models.Operation swaggerOperation, HttpMethod httpMethod) {
switch (httpMethod) {
case GET:
pathItem.get(swaggerOperation);
break;
case POST:
pathItem.post(swaggerOperation);
break;
case PUT:
pathItem.put(swaggerOperation);
break;
case PATCH:
pathItem.patch(swaggerOperation);
break;
case DELETE:
pathItem.delete(swaggerOperation);
break;
case HEAD:
pathItem.head(swaggerOperation);
break;
case OPTIONS:
pathItem.options(swaggerOperation);
break;
case TRACE:
pathItem.trace(swaggerOperation);
break;
default:
// unprocessable
}
}
private void readApiResponses(MethodElement element, VisitorContext context, io.swagger.v3.oas.models.Operation swaggerOperation) {
List> responseAnnotations = element.getAnnotationValuesByType(io.swagger.v3.oas.annotations.responses.ApiResponse.class);
if (CollectionUtils.isNotEmpty(responseAnnotations)) {
ApiResponses apiResponses = new ApiResponses();
for (AnnotationValue r : responseAnnotations) {
JsonNode jn = toJson(r.getValues(), context);
try {
Optional newResponse = Optional.of(jsonMapper.treeToValue(jn, ApiResponse.class));
newResponse.ifPresent(apiResponse -> {
String name = r.get("responseCode", String.class).orElse("default");
apiResponses.put(name, apiResponse);
});
} catch (Exception e) {
context.warn("Error reading Swagger ApiResponses for element [" + element + "]: " + e.getMessage(), element);
}
}
swaggerOperation.setResponses(apiResponses);
}
}
private void readSecurityRequirements(MethodElement element, VisitorContext context, io.swagger.v3.oas.models.Operation swaggerOperation) {
List> securityAnnotations = element.getAnnotationValuesByType(io.swagger.v3.oas.annotations.security.SecurityRequirement.class);
if (CollectionUtils.isNotEmpty(securityAnnotations)) {
for (AnnotationValue r : securityAnnotations) {
JsonNode jn = toJson(r.getValues(), context);
try {
Optional newRequirement = Optional.of(jsonMapper.treeToValue(jn, SecurityRequirement.class));
newRequirement.ifPresent(swaggerOperation::addSecurityItem);
} catch (Exception e) {
context.warn("Error reading Swagger SecurityRequirement for element [" + element + "]: " + e.getMessage(), element);
}
}
}
}
private void readServers(MethodElement element, VisitorContext context, io.swagger.v3.oas.models.Operation swaggerOperation) {
List> serverAnnotations = element.getAnnotationValuesByType(io.swagger.v3.oas.annotations.servers.Server.class);
if (CollectionUtils.isNotEmpty(serverAnnotations)) {
for (AnnotationValue r : serverAnnotations) {
JsonNode jn = toJson(r.getValues(), context);
try {
Optional newRequirement = Optional.of(jsonMapper.treeToValue(jn, Server.class));
newRequirement.ifPresent(swaggerOperation::addServersItem);
} catch (Exception e) {
context.warn("Error reading Swagger Server for element [" + element + "]: " + e.getMessage(), element);
}
}
}
}
private void readCallbacks(MethodElement element, VisitorContext context, io.swagger.v3.oas.models.Operation swaggerOperation) {
List> callbackAnnotations = element.getAnnotationValuesByType(Callback.class);
if (CollectionUtils.isNotEmpty(callbackAnnotations)) {
for (AnnotationValue callbackAnn : callbackAnnotations) {
final Optional n = callbackAnn.get("name", String.class);
n.ifPresent(callbackName -> {
final Optional expr = callbackAnn.get("callbackUrlExpression", String.class);
if (expr.isPresent()) {
final String callbackUrl = expr.get();
final List> operations = callbackAnn.getAnnotations("operation", Operation.class);
if (CollectionUtils.isEmpty(operations)) {
Map callbacks = initCallbacks(swaggerOperation);
final io.swagger.v3.oas.models.callbacks.Callback c = new io.swagger.v3.oas.models.callbacks.Callback();
c.addPathItem(callbackUrl, new PathItem());
callbacks.put(callbackName, c);
} else {
final PathItem pathItem = new PathItem();
for (AnnotationValue operation : operations) {
final Optional operationMethod = operation.get("method", HttpMethod.class);
operationMethod.ifPresent(httpMethod -> {
JsonNode jsonNode = toJson(operation.getValues(), context);
try {
final Optional op = Optional.of(jsonMapper.treeToValue(jsonNode, io.swagger.v3.oas.models.Operation.class));
op.ifPresent(operation1 -> setOperationOnPathItem(pathItem, operation1, httpMethod));
} catch (Exception e) {
context.warn("Error reading Swagger Operation for element [" + element + "]: " + e.getMessage(), element);
}
});
}
Map callbacks = initCallbacks(swaggerOperation);
final io.swagger.v3.oas.models.callbacks.Callback c = new io.swagger.v3.oas.models.callbacks.Callback();
c.addPathItem(callbackUrl, pathItem);
callbacks.put(callbackName, c);
}
} else {
final Components components = resolveComponents(resolveOpenAPI(context));
final Map callbackComponents = components.getCallbacks();
if (callbackComponents != null && callbackComponents.containsKey(callbackName)) {
Map callbacks = initCallbacks(swaggerOperation);
final io.swagger.v3.oas.models.callbacks.Callback callbackRef = new io.swagger.v3.oas.models.callbacks.Callback();
callbackRef.set$ref("#/components/callbacks/" + callbackName);
callbacks.put(callbackName, callbackRef);
}
}
});
}
}
}
private Map initCallbacks(io.swagger.v3.oas.models.Operation swaggerOperation) {
Map callbacks = swaggerOperation.getCallbacks();
if (callbacks == null) {
callbacks = new LinkedHashMap<>();
swaggerOperation.setCallbacks(callbacks);
}
return callbacks;
}
private void readTags(MethodElement element, io.swagger.v3.oas.models.Operation swaggerOperation) {
List> tagAnnotations = element.getAnnotationValuesByType(Tag.class);
if (CollectionUtils.isNotEmpty(tagAnnotations)) {
for (AnnotationValue r : tagAnnotations) {
r.get("name", String.class).ifPresent(swaggerOperation::addTagsItem);
}
}
}
private Content buildContent(Element definingElement, ClassElement type, String mediaType, OpenAPI openAPI, VisitorContext context) {
Content content = new Content();
io.swagger.v3.oas.models.media.MediaType mt = new io.swagger.v3.oas.models.media.MediaType();
mt.setSchema(resolveSchema(openAPI, definingElement, type, context, mediaType));
content.addMediaType(mediaType, mt);
return content;
}
}
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