| /* |
| * Copyright 2016-present Open Networking Laboratory |
| * |
| * 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 org.onosproject.onosjar; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.node.ArrayNode; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import com.google.common.io.ByteStreams; |
| import com.google.common.io.Files; |
| import com.thoughtworks.qdox.JavaProjectBuilder; |
| import com.thoughtworks.qdox.model.DocletTag; |
| import com.thoughtworks.qdox.model.JavaAnnotation; |
| import com.thoughtworks.qdox.model.JavaClass; |
| import com.thoughtworks.qdox.model.JavaMethod; |
| import com.thoughtworks.qdox.model.JavaParameter; |
| import com.thoughtworks.qdox.model.JavaType; |
| |
| import java.io.File; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| |
| import static com.google.common.base.Strings.isNullOrEmpty; |
| |
| /** |
| * Generates Swagger JSON artifacts from the Java source files. |
| */ |
| public class SwaggerGenerator { |
| |
| private final ObjectMapper mapper = new ObjectMapper(); |
| |
| private static final String JSON_FILE = "swagger.json"; |
| private static final String GEN_SRC = "generated-sources"; |
| private static final String REG_SRC = "/registrator.javat"; |
| |
| private static final String PATH = "javax.ws.rs.Path"; |
| private static final String PATH_PARAM = "javax.ws.rs.PathParam"; |
| private static final String QUERY_PARAM = "javax.ws.rs.QueryParam"; |
| private static final String POST = "javax.ws.rs.POST"; |
| private static final String GET = "javax.ws.rs.GET"; |
| private static final String PUT = "javax.ws.rs.PUT"; |
| private static final String DELETE = "javax.ws.rs.DELETE"; |
| private static final String PRODUCES = "javax.ws.rs.Produces"; |
| private static final String CONSUMES = "javax.ws.rs.Consumes"; |
| private static final String JSON = "MediaType.APPLICATION_JSON"; |
| private static final String OCTET_STREAM = "MediaType.APPLICATION_OCTET_STREAM"; |
| |
| private final List<File> srcs; |
| private final List<File> resources; |
| private final File srcDirectory; |
| private final File resourceDirectory; |
| private final File genSrcOutputDirectory; |
| private final File genResourcesOutputDirectory; |
| private final String webContext; |
| private final String apiTitle; |
| private final String apiVersion; |
| private final String apiPackage; |
| private final String apiDescription; |
| |
| public SwaggerGenerator(List<File> srcs, List<File> resources, |
| File srcDirectory, File resourceDirectory, |
| File genSrcOutputDirectory, File genResourcesOutputDirectory, |
| String webContext, String apiTitle, String apiVersion, |
| String apiPackage, String apiDescription) { |
| this.srcs = srcs; |
| this.resources = resources; |
| this.srcDirectory = srcDirectory; |
| this.resourceDirectory = resourceDirectory; |
| this.genSrcOutputDirectory = genSrcOutputDirectory; |
| this.genResourcesOutputDirectory = genResourcesOutputDirectory; |
| this.webContext = webContext; |
| |
| this.apiTitle = apiTitle; |
| this.apiVersion = apiVersion; |
| this.apiPackage = apiPackage; |
| this.apiDescription = apiDescription; |
| } |
| |
| public void execute() { |
| try { |
| JavaProjectBuilder builder = new JavaProjectBuilder(); |
| if (srcDirectory != null) { |
| builder.addSourceTree(new File(srcDirectory, "src/main/java")); |
| } |
| if (srcs != null) { |
| srcs.forEach(src -> { |
| if (src.toString().endsWith(".java")) { |
| try { |
| builder.addSource(src); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| }); |
| } |
| |
| ObjectNode root = initializeRoot(webContext, apiTitle, apiVersion, apiDescription); |
| ArrayNode tags = mapper.createArrayNode(); |
| ObjectNode paths = mapper.createObjectNode(); |
| ObjectNode definitions = mapper.createObjectNode(); |
| |
| root.set("tags", tags); |
| root.set("paths", paths); |
| root.set("definitions", definitions); |
| |
| // TODO: Process resources to allow lookup of files by name |
| |
| builder.getClasses().forEach(jc -> processClass(jc, paths, tags, definitions, srcDirectory)); |
| |
| if (paths.size() > 0) { |
| genCatalog(genResourcesOutputDirectory, root); |
| if (!isNullOrEmpty(apiPackage)) { |
| genRegistrator(genSrcOutputDirectory, webContext, apiTitle, apiVersion, |
| apiPackage, apiDescription); |
| } |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| throw new RuntimeException("Unable to generate ONOS REST API documentation", e); |
| } |
| } |
| |
| // initializes top level root with Swagger required specifications |
| private ObjectNode initializeRoot(String webContext, String apiTitle, |
| String apiVersion, String apiDescription) { |
| ObjectNode root = mapper.createObjectNode(); |
| root.put("swagger", "2.0"); |
| ObjectNode info = mapper.createObjectNode(); |
| root.set("info", info); |
| |
| root.put("basePath", webContext); |
| info.put("version", apiVersion); |
| info.put("title", apiTitle); |
| info.put("description", apiDescription); |
| |
| ArrayNode produces = mapper.createArrayNode(); |
| produces.add("application/json"); |
| root.set("produces", produces); |
| |
| ArrayNode consumes = mapper.createArrayNode(); |
| consumes.add("application/json"); |
| root.set("consumes", consumes); |
| |
| return root; |
| } |
| |
| // Checks whether javaClass has a path tag associated with it and if it does |
| // processes its methods and creates a tag for the class on the root |
| void processClass(JavaClass javaClass, ObjectNode paths, ArrayNode tags, |
| ObjectNode definitions, File srcDirectory) { |
| // If the class does not have a Path tag then ignore it |
| JavaAnnotation annotation = getPathAnnotation(javaClass); |
| if (annotation == null) { |
| return; |
| } |
| |
| String path = getPath(annotation); |
| if (path == null) { |
| return; |
| } |
| |
| String resourcePath = "/" + path; |
| String tagPath = path.isEmpty() ? "/" : path; |
| |
| // Create tag node for this class. |
| ObjectNode tagObject = mapper.createObjectNode(); |
| tagObject.put("name", tagPath); |
| if (javaClass.getComment() != null) { |
| tagObject.put("description", shortText(javaClass.getComment())); |
| } |
| tags.add(tagObject); |
| |
| // Create an array node add to all methods from this class. |
| ArrayNode tagArray = mapper.createArrayNode(); |
| tagArray.add(tagPath); |
| |
| processAllMethods(javaClass, resourcePath, paths, tagArray, definitions, srcDirectory); |
| } |
| |
| private JavaAnnotation getPathAnnotation(JavaClass javaClass) { |
| Optional<JavaAnnotation> optional = javaClass.getAnnotations() |
| .stream().filter(a -> a.getType().getName().equals(PATH)).findAny(); |
| return optional.orElse(null); |
| } |
| |
| // Checks whether a class's methods are REST methods and then places all the |
| // methods under a specific path into the paths node |
| private void processAllMethods(JavaClass javaClass, String resourcePath, |
| ObjectNode paths, ArrayNode tagArray, ObjectNode definitions, |
| File srcDirectory) { |
| // map of the path to its methods represented by an ObjectNode |
| Map<String, ObjectNode> pathMap = new HashMap<>(); |
| |
| javaClass.getMethods().forEach(javaMethod -> { |
| javaMethod.getAnnotations().forEach(annotation -> { |
| String name = annotation.getType().getName(); |
| if (name.equals(POST) || name.equals(GET) || name.equals(DELETE) || name.equals(PUT)) { |
| // substring(12) removes "javax.ws.rs." |
| String method = annotation.getType().toString().substring(12).toLowerCase(); |
| processRestMethod(javaMethod, method, pathMap, resourcePath, tagArray, definitions, srcDirectory); |
| } |
| }); |
| }); |
| |
| // for each path add its methods to the path node |
| for (Map.Entry<String, ObjectNode> entry : pathMap.entrySet()) { |
| paths.set(entry.getKey(), entry.getValue()); |
| } |
| |
| |
| } |
| |
| private void processRestMethod(JavaMethod javaMethod, String method, |
| Map<String, ObjectNode> pathMap, |
| String resourcePath, ArrayNode tagArray, |
| ObjectNode definitions, File srcDirectory) { |
| String fullPath = resourcePath, consumes = "", produces = "", |
| comment = javaMethod.getComment(); |
| DocletTag tag = javaMethod.getTagByName("onos.rsModel"); |
| for (JavaAnnotation annotation : javaMethod.getAnnotations()) { |
| String name = annotation.getType().getName(); |
| if (name.equals(PATH)) { |
| fullPath = resourcePath + "/" + getPath(annotation); |
| fullPath = fullPath.replaceFirst("^//", "/"); |
| } |
| if (name.equals(CONSUMES)) { |
| consumes = getIOType(annotation); |
| } |
| if (name.equals(PRODUCES)) { |
| produces = getIOType(annotation); |
| } |
| } |
| ObjectNode methodNode = mapper.createObjectNode(); |
| methodNode.set("tags", tagArray); |
| |
| addSummaryDescriptions(methodNode, comment); |
| addJsonSchemaDefinition(srcDirectory, definitions, tag); |
| |
| processParameters(javaMethod, methodNode, method, tag); |
| |
| processConsumesProduces(methodNode, "consumes", consumes); |
| processConsumesProduces(methodNode, "produces", produces); |
| if (tag == null || ((method.toLowerCase().equals("post") || method.toLowerCase().equals("put")) |
| && !(tag.getParameters().size() > 1))) { |
| addResponses(methodNode, tag, false); |
| } else { |
| addResponses(methodNode, tag, true); |
| } |
| |
| ObjectNode operations = pathMap.get(fullPath); |
| if (operations == null) { |
| operations = mapper.createObjectNode(); |
| operations.set(method, methodNode); |
| pathMap.put(fullPath, operations); |
| } else { |
| operations.set(method, methodNode); |
| } |
| } |
| |
| private void addJsonSchemaDefinition(File srcDirectory, ObjectNode definitions, DocletTag tag) { |
| final File definitionsDirectory; |
| if (resourceDirectory != null) { |
| definitionsDirectory = new File(resourceDirectory, "definitions"); |
| } else if (srcDirectory != null) { |
| definitionsDirectory = new File(srcDirectory + "/src/main/resources/definitions"); |
| } else { |
| definitionsDirectory = null; |
| } |
| if (tag != null) { |
| tag.getParameters().forEach(param -> { |
| try { |
| File config; |
| if (definitionsDirectory != null) { |
| config = new File(definitionsDirectory.getAbsolutePath() + "/" + param + ".json"); |
| } else { |
| config = resources.stream().filter(f -> f.getName().equals(param + ".json")).findFirst().orElse(null); |
| } |
| definitions.set(param, mapper.readTree(config)); |
| } catch (IOException e) { |
| throw new RuntimeException(String.format("Could not process %s in %s@%s: %s", |
| tag.getName(), tag.getContext(), tag.getLineNumber(), |
| e.getMessage()), e); |
| } |
| }); |
| } |
| } |
| |
| private void processConsumesProduces(ObjectNode methodNode, String type, String io) { |
| if (!io.equals("")) { |
| ArrayNode array = mapper.createArrayNode(); |
| methodNode.set(type, array); |
| array.add(io); |
| } |
| } |
| |
| private void addSummaryDescriptions(ObjectNode methodNode, String comment) { |
| String summary = "", description; |
| if (comment != null) { |
| if (comment.contains(".")) { |
| int periodIndex = comment.indexOf("."); |
| summary = comment.substring(0, periodIndex); |
| description = comment.length() > periodIndex + 1 ? |
| comment.substring(periodIndex + 1).trim() : ""; |
| } else { |
| description = comment; |
| } |
| methodNode.put("summary", summary); |
| methodNode.put("description", description); |
| } |
| } |
| |
| // Temporary solution to add responses to a method |
| private void addResponses(ObjectNode methodNode, DocletTag tag, boolean responseJson) { |
| ObjectNode responses = mapper.createObjectNode(); |
| methodNode.set("responses", responses); |
| |
| ObjectNode success = mapper.createObjectNode(); |
| success.put("description", "successful operation"); |
| responses.set("200", success); |
| if (tag != null && responseJson) { |
| ObjectNode schema = mapper.createObjectNode(); |
| tag.getParameters().stream().forEach( |
| param -> schema.put("$ref", "#/definitions/" + param)); |
| success.set("schema", schema); |
| } |
| |
| ObjectNode defaultObj = mapper.createObjectNode(); |
| defaultObj.put("description", "Unexpected error"); |
| responses.set("default", defaultObj); |
| } |
| |
| // Checks if the annotations has a value of JSON and returns the string |
| // that Swagger requires |
| private String getIOType(JavaAnnotation annotation) { |
| if (annotation.getNamedParameter("value").toString().equals(JSON)) { |
| return "application/json"; |
| } else if (annotation.getNamedParameter("value").toString().equals(OCTET_STREAM)) { |
| return "application/octet_stream"; |
| } |
| return ""; |
| } |
| |
| // If the annotation has a Path tag, returns the value with leading and |
| // trailing double quotes and slash removed. |
| private String getPath(JavaAnnotation annotation) { |
| String path = annotation.getNamedParameter("value").toString(); |
| return path == null ? null : path.replaceAll("(^[\\\"/]*|[/\\\"]*$)", ""); |
| } |
| |
| // Processes parameters of javaMethod and enters the proper key-values into the methodNode |
| private void processParameters(JavaMethod javaMethod, ObjectNode methodNode, String method, DocletTag tag) { |
| ArrayNode parameters = mapper.createArrayNode(); |
| methodNode.set("parameters", parameters); |
| boolean required = true; |
| |
| for (JavaParameter javaParameter : javaMethod.getParameters()) { |
| ObjectNode individualParameterNode = mapper.createObjectNode(); |
| Optional<JavaAnnotation> optional = javaParameter.getAnnotations().stream().filter( |
| annotation -> annotation.getType().getName().equals(PATH_PARAM) || |
| annotation.getType().getName().equals(QUERY_PARAM)).findAny(); |
| JavaAnnotation pathType = optional.orElse(null); |
| |
| String annotationName = javaParameter.getName(); |
| |
| |
| if (pathType != null) { //the parameter is a path or query parameter |
| individualParameterNode.put("name", |
| pathType.getNamedParameter("value") |
| .toString().replace("\"", "")); |
| if (pathType.getType().getName().equals(PATH_PARAM)) { |
| individualParameterNode.put("in", "path"); |
| } else if (pathType.getType().getName().equals(QUERY_PARAM)) { |
| individualParameterNode.put("in", "query"); |
| } |
| individualParameterNode.put("type", getType(javaParameter.getType())); |
| } else { // the parameter is a body parameter |
| individualParameterNode.put("name", annotationName); |
| individualParameterNode.put("in", "body"); |
| |
| // Adds the reference to the Json model for the input |
| // that goes in the post or put operation |
| if (tag != null && (method.toLowerCase().equals("post") || |
| method.toLowerCase().equals("put"))) { |
| ObjectNode schema = mapper.createObjectNode(); |
| tag.getParameters().stream().forEach(param -> { |
| schema.put("$ref", "#/definitions/" + param); |
| }); |
| individualParameterNode.set("schema", schema); |
| } |
| } |
| for (DocletTag p : javaMethod.getTagsByName("param")) { |
| if (p.getValue().contains(annotationName)) { |
| String description = ""; |
| if (p.getValue().split(" ", 2).length >= 2) { |
| description = p.getValue().split(" ", 2)[1].trim(); |
| if (description.contains("optional")) { |
| required = false; |
| } |
| } else { |
| throw new RuntimeException(String.format("No description for parameter \"%s\" in " + |
| "method \"%s\" in %s (line %d)", |
| p.getValue(), javaMethod.getName(), |
| javaMethod.getDeclaringClass().getName(), |
| javaMethod.getLineNumber())); |
| } |
| individualParameterNode.put("description", description); |
| } |
| } |
| individualParameterNode.put("required", required); |
| parameters.add(individualParameterNode); |
| } |
| } |
| |
| // Returns the Swagger specified strings for the type of a parameter |
| private String getType(JavaType javaType) { |
| String type = javaType.getFullyQualifiedName(); |
| String value; |
| if (type.equals(String.class.getName())) { |
| value = "string"; |
| } else if (type.equals("int")) { |
| value = "integer"; |
| } else if (type.equals(boolean.class.getName())) { |
| value = "boolean"; |
| } else if (type.equals(long.class.getName())) { |
| value = "number"; |
| } else { |
| value = ""; |
| } |
| return value; |
| } |
| |
| // Writes the swagger.json file using the supplied JSON root. |
| private void genCatalog(File dstDirectory, ObjectNode root) { |
| File swaggerCfg = new File(dstDirectory, JSON_FILE); |
| if (dstDirectory.exists() || dstDirectory.mkdirs()) { |
| try (FileWriter fw = new FileWriter(swaggerCfg); |
| PrintWriter pw = new PrintWriter(fw)) { |
| pw.println(root.toString()); |
| } catch (IOException e) { |
| throw new RuntimeException("Unable to write " + JSON_FILE, e); |
| } |
| } else { |
| throw new RuntimeException("Unable to create " + dstDirectory); |
| } |
| } |
| |
| // Generates the registrator Java component. |
| private void genRegistrator(File dstDirectory, String webContext, |
| String apiTitle, String apiVersion, |
| String apiPackage, String apiDescription) { |
| File dir = new File(dstDirectory, resourceDirectory != null ? GEN_SRC : "."); |
| File reg = new File(dir, apiRegistratorPath(apiPackage)); |
| File pkg = reg.getParentFile(); |
| if (pkg.exists() || pkg.mkdirs()) { |
| try { |
| String src = new String(ByteStreams.toByteArray(getClass().getResourceAsStream(REG_SRC))); |
| src = src.replace("${api.package}", apiPackage) |
| .replace("${web.context}", webContext) |
| .replace("${api.title}", apiTitle) |
| .replace("${api.description}", apiDescription); |
| Files.write(src.getBytes(), reg); |
| } catch (IOException e) { |
| throw new RuntimeException("Unable to write " + reg, e); |
| } |
| } else { |
| throw new RuntimeException("Unable to create " + reg); |
| } |
| } |
| |
| private String shortText(String comment) { |
| int i = comment.indexOf('.'); |
| return i > 0 ? comment.substring(0, i) : comment; |
| } |
| |
| public static String apiRegistratorPath(String apiPackage) { |
| return apiPackage.replaceAll("\\.", "/") + "/ApiDocRegistrator.java"; |
| } |
| } |