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146 lines (119 loc) · 6.68 KB
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/**
* Copyright (C) 2010-2012 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 com.googlecode.androidannotations.processing.rest;
import static com.sun.codemodel.JExpr._this;
import java.lang.annotation.Annotation;
import java.util.List;
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.TypeKind;
import javax.lang.model.util.ElementFilter;
import com.googlecode.androidannotations.annotations.rest.Rest;
import com.googlecode.androidannotations.helper.ModelConstants;
import com.googlecode.androidannotations.processing.EBeansHolder;
import com.googlecode.androidannotations.processing.ElementProcessor;
import com.sun.codemodel.ClassType;
import com.sun.codemodel.JClass;
import com.sun.codemodel.JCodeModel;
import com.sun.codemodel.JExpr;
import com.sun.codemodel.JMethod;
import com.sun.codemodel.JMod;
import com.sun.codemodel.JVar;
public class RestProcessor implements ElementProcessor {
private static final String SPRING_REST_TEMPLATE_QUALIFIED_NAME = "org.springframework.web.client.RestTemplate";
private static final String JAVA_STRING_QUALIFIED_NAME = "java.lang.String";
private final RestImplementationsHolder restImplementationHolder;
public RestProcessor(RestImplementationsHolder restImplementationHolder) {
this.restImplementationHolder = restImplementationHolder;
}
@Override
public Class<? extends Annotation> getTarget() {
return Rest.class;
}
@Override
public void process(Element element, JCodeModel codeModel, EBeansHolder activitiesHolder) throws Exception {
RestImplementationHolder holder = restImplementationHolder.create(element);
TypeElement typeElement = (TypeElement) element;
String interfaceName = typeElement.getQualifiedName().toString();
String implementationName = interfaceName + ModelConstants.GENERATION_SUFFIX;
// holder.restImplementationClass = codeModel._class(JMod.PUBLIC |
// JMod.ABSTRACT, implementationName, ClassType.CLASS);
holder.restImplementationClass = codeModel._class(JMod.PUBLIC, implementationName, ClassType.CLASS);
JClass interfaceClass = holder.refClass(interfaceName);
holder.restImplementationClass._implements(interfaceClass);
// RestTemplate field
JClass restTemplateClass = holder.refClass(SPRING_REST_TEMPLATE_QUALIFIED_NAME);
holder.restTemplateField = holder.restImplementationClass.field(JMod.PRIVATE, restTemplateClass, "restTemplate");
// RootUrl field
JClass stringClass = holder.refClass(JAVA_STRING_QUALIFIED_NAME);
holder.rootUrlField = holder.restImplementationClass.field(JMod.PRIVATE, stringClass, "rootUrl");
// Default constructor
JMethod defaultConstructor = holder.restImplementationClass.constructor(JMod.PUBLIC);
defaultConstructor.body().assign(holder.restTemplateField, JExpr._new(restTemplateClass));
defaultConstructor.body().assign(holder.rootUrlField, JExpr.lit(typeElement.getAnnotation(Rest.class).value()));
// RestTemplate constructor
JMethod restTemplateConstructor = holder.restImplementationClass.constructor(JMod.PUBLIC);
JVar restTemplateParam = restTemplateConstructor.param(restTemplateClass, "restTemplate");
restTemplateConstructor.body().assign(JExpr._this().ref(holder.restTemplateField), restTemplateParam);
// RequestFactory constructor
JMethod requestFactoryConstructor = holder.restImplementationClass.constructor(JMod.PUBLIC);
JClass requestFactoryClass = holder.refClass("org.springframework.http.client.ClientHttpRequestFactory");
JVar requestFactoryParam = requestFactoryConstructor.param(requestFactoryClass, "requestFactory");
requestFactoryConstructor.body().assign(holder.restTemplateField, JExpr._new(restTemplateClass).arg(requestFactoryParam));
// 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(SPRING_REST_TEMPLATE_QUALIFIED_NAME)) {
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(SPRING_REST_TEMPLATE_QUALIFIED_NAME)) {
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 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(JAVA_STRING_QUALIFIED_NAME) && 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
}
}
}
}
}