Files
Athou_commafeed/src/main/java/com/commafeed/frontend/APIGenerator.java

102 lines
3.5 KiB
Java

package com.commafeed.frontend;
import java.io.OutputStream;
import java.util.Set;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedOptions;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic.Kind;
import javax.tools.FileObject;
import javax.tools.StandardLocation;
import org.apache.commons.lang.StringUtils;
import org.apache.wicket.util.io.IOUtils;
import com.commafeed.frontend.model.Entries;
import com.commafeed.frontend.model.request.MarkRequest;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.wordnik.swagger.annotations.Api;
import com.wordnik.swagger.core.Documentation;
import com.wordnik.swagger.core.DocumentationEndPoint;
import com.wordnik.swagger.core.SwaggerSpec;
import com.wordnik.swagger.core.util.TypeUtil;
import com.wordnik.swagger.jaxrs.HelpApi;
import com.wordnik.swagger.jaxrs.JaxrsApiReader;
@SupportedAnnotationTypes("com.wordnik.swagger.annotations.Api")
@SupportedOptions("outputDirectory")
public class APIGenerator extends AbstractProcessor {
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
try {
return processInternal(annotations, roundEnv);
} catch (Exception e) {
e.printStackTrace();
processingEnv.getMessager().printMessage(Kind.ERROR, e.getMessage());
}
return false;
}
private boolean processInternal(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) throws Exception {
JaxrsApiReader.setFormatString("");
TypeUtil.addAllowablePackage(Entries.class.getPackage().getName());
TypeUtil.addAllowablePackage(MarkRequest.class.getPackage().getName());
String apiVersion = "1.0";
String swaggerVersion = SwaggerSpec.version();
String basePath = "../rest";
Documentation doc = new Documentation();
for (Element element : roundEnv.getElementsAnnotatedWith(Api.class)) {
TypeElement type = (TypeElement) element;
String fqn = type.getQualifiedName().toString();
Class<?> resource = Class.forName(fqn);
Api api = resource.getAnnotation(Api.class);
String apiPath = api.value();
Documentation apiDoc = JaxrsApiReader.read(resource, apiVersion, swaggerVersion, basePath, apiPath);
apiDoc = new HelpApi(null).filterDocs(apiDoc, null, null, null, null);
apiDoc.setSwaggerVersion(swaggerVersion);
apiDoc.setApiVersion(apiVersion);
write(apiDoc.getResourcePath(), apiDoc, element);
doc.addApi(new DocumentationEndPoint(api.value(), api.description()));
}
doc.setSwaggerVersion(swaggerVersion);
doc.setApiVersion(apiVersion);
write(doc.getResourcePath(), doc, null);
return true;
}
private void write(String resourcePath, Object doc, Element element) throws Exception {
String fileName = StringUtils.defaultString(resourcePath, "resources");
fileName = StringUtils.removeStart(fileName, "/");
FileObject resource = null;
try {
resource = processingEnv.getFiler().createResource(StandardLocation.SOURCE_OUTPUT, "", fileName, element);
} catch (Exception e) {
// already processed
}
if (resource != null) {
OutputStream os = resource.openOutputStream();
try {
IOUtils.write(new ObjectMapper().writeValueAsString(doc), os, "UTF-8");
} finally {
IOUtils.closeQuietly(os);
}
}
}
}