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188 lines (156 loc) · 8.16 KB
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/**
* Copyright (C) 2010-2013 eBusiness Information, Excilys Group
*
* 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.androidannotations.processing.rest;
import static com.sun.codemodel.JExpr._new;
import static com.sun.codemodel.JExpr._this;
import static com.sun.codemodel.JExpr.invoke;
import static com.sun.codemodel.JExpr.lit;
import static org.androidannotations.helper.CanonicalNameConstants.ARRAYLIST;
import static org.androidannotations.helper.CanonicalNameConstants.CLIENT_HTTP_REQUEST_INTERCEPTOR;
import static org.androidannotations.helper.CanonicalNameConstants.REST_TEMPLATE;
import static org.androidannotations.helper.CanonicalNameConstants.STRING;
import java.util.List;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.type.TypeKind;
import javax.lang.model.util.ElementFilter;
import org.androidannotations.annotations.rest.Rest;
import org.androidannotations.helper.AnnotationHelper;
import org.androidannotations.helper.ModelConstants;
import org.androidannotations.processing.EBeansHolder;
import org.androidannotations.processing.GeneratingElementProcessor;
import com.sun.codemodel.ClassType;
import com.sun.codemodel.JBlock;
import com.sun.codemodel.JClass;
import com.sun.codemodel.JCodeModel;
import com.sun.codemodel.JMethod;
import com.sun.codemodel.JMod;
import com.sun.codemodel.JVar;
public class RestProcessor implements GeneratingElementProcessor {
private final RestImplementationsHolder restImplementationsHolder;
private AnnotationHelper annotationHelper;
public RestProcessor(ProcessingEnvironment processingEnv, RestImplementationsHolder restImplementationsHolder) {
annotationHelper = new AnnotationHelper(processingEnv);
this.restImplementationsHolder = restImplementationsHolder;
}
@Override
public String getTarget() {
return Rest.class.getName();
}
@Override
public void process(Element element, JCodeModel codeModel, EBeansHolder eBeansHolder) throws Exception {
RestImplementationHolder holder = restImplementationsHolder.create(element);
TypeElement typeElement = (TypeElement) element;
String interfaceName = typeElement.getQualifiedName().toString();
String implementationName = interfaceName + ModelConstants.GENERATION_SUFFIX;
holder.restImplementationClass = codeModel._class(JMod.PUBLIC, implementationName, ClassType.CLASS);
eBeansHolder.create(element, Rest.class, holder.restImplementationClass);
JClass interfaceClass = eBeansHolder.refClass(interfaceName);
holder.restImplementationClass._implements(interfaceClass);
// RestTemplate field
JClass restTemplateClass = eBeansHolder.refClass(REST_TEMPLATE);
holder.restTemplateField = holder.restImplementationClass.field(JMod.PRIVATE, restTemplateClass, "restTemplate");
// RootUrl field
JClass stringClass = eBeansHolder.refClass(STRING);
holder.rootUrlField = holder.restImplementationClass.field(JMod.PRIVATE, stringClass, "rootUrl");
{
// Constructor
JMethod constructor = holder.restImplementationClass.constructor(JMod.PUBLIC);
JBlock constructorBody = constructor.body();
constructorBody.assign(holder.restTemplateField, _new(restTemplateClass));
{
// Converters
List<DeclaredType> converters = annotationHelper.extractAnnotationClassArrayParameter(element, getTarget(), "converters");
for (DeclaredType converterType : converters) {
JClass converterClass = eBeansHolder.refClass(converterType.toString());
constructorBody.add(invoke(holder.restTemplateField, "getMessageConverters").invoke("add").arg(_new(converterClass)));
}
}
{
// Interceptors
List<DeclaredType> interceptors = annotationHelper.extractAnnotationClassArrayParameter(element, getTarget(), "interceptors");
if (interceptors != null) {
JClass listClass = eBeansHolder.refClass(ARRAYLIST);
JClass clientInterceptorClass = eBeansHolder.refClass(CLIENT_HTTP_REQUEST_INTERCEPTOR);
listClass = listClass.narrow(clientInterceptorClass);
constructorBody.add(invoke(holder.restTemplateField, "setInterceptors").arg(_new(listClass)));
for (DeclaredType interceptorType : interceptors) {
JClass interceptorClass = eBeansHolder.refClass(interceptorType.toString());
constructorBody.add(invoke(holder.restTemplateField, "getInterceptors").invoke("add").arg(_new(interceptorClass)));
}
}
}
constructorBody.assign(holder.rootUrlField, lit(typeElement.getAnnotation(Rest.class).rootUrl()));
}
// Implement getRestTemplate method
List<? extends Element> enclosedElements = typeElement.getEnclosedElements();
List<ExecutableElement> methods = ElementFilter.methodsIn(enclosedElements);
for (ExecutableElement method : methods) {
if (method.getParameters().size() == 0 && method.getReturnType().toString().equals(REST_TEMPLATE)) {
String methodName = method.getSimpleName().toString();
JMethod getRestTemplateMethod = holder.restImplementationClass.method(JMod.PUBLIC, restTemplateClass, methodName);
getRestTemplateMethod.annotate(Override.class);
getRestTemplateMethod.body()._return(holder.restTemplateField);
break; // Only one implementation
}
}
for (ExecutableElement method : methods) {
List<? extends VariableElement> parameters = method.getParameters();
if (parameters.size() == 1 && method.getReturnType().getKind() == TypeKind.VOID) {
VariableElement firstParameter = parameters.get(0);
if (firstParameter.asType().toString().equals(REST_TEMPLATE)) {
String methodName = method.getSimpleName().toString();
JMethod setRestTemplateMethod = holder.restImplementationClass.method(JMod.PUBLIC, codeModel.VOID, methodName);
setRestTemplateMethod.annotate(Override.class);
JVar restTemplateSetterParam = setRestTemplateMethod.param(restTemplateClass, firstParameter.getSimpleName().toString());
setRestTemplateMethod.body().assign(_this().ref(holder.restTemplateField), restTemplateSetterParam);
break; // Only one implementation
}
}
}
// Implement getRootUrl method
implementGetRootUrl(holder, eBeansHolder, methods);
// Implement setRootUrl method
for (ExecutableElement method : methods) {
List<? extends VariableElement> parameters = method.getParameters();
if (parameters.size() == 1 && method.getReturnType().getKind() == TypeKind.VOID) {
VariableElement firstParameter = parameters.get(0);
if (firstParameter.asType().toString().equals(STRING) && method.getSimpleName().toString().equals("setRootUrl")) {
JMethod setRootUrlMethod = holder.restImplementationClass.method(JMod.PUBLIC, codeModel.VOID, method.getSimpleName().toString());
setRootUrlMethod.annotate(Override.class);
JVar rootUrlSetterParam = setRootUrlMethod.param(stringClass, firstParameter.getSimpleName().toString());
setRootUrlMethod.body().assign(_this().ref(holder.rootUrlField), rootUrlSetterParam);
break; // Only one implementation
}
}
}
}
private void implementGetRootUrl(RestImplementationHolder holder, EBeansHolder eBeansHolder, List<ExecutableElement> methods) {
for (ExecutableElement method : methods) {
String methodName = method.getSimpleName().toString();
if (method.getParameters().size() == 0 && method.getReturnType().toString().equals(STRING) && methodName.equals("getRootUrl")) {
JMethod getRootUrlMethod = holder.restImplementationClass.method(JMod.PUBLIC, eBeansHolder.refClass(STRING), methodName);
getRootUrlMethod.annotate(Override.class);
getRootUrlMethod.body()._return(holder.rootUrlField);
return; // Only one implementation
}
}
}
}