compiler 重构
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AriaLyy
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/*
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* Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.arialyy.compiler;
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import java.lang.annotation.Annotation;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import javax.annotation.processing.RoundEnvironment;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.ElementKind;
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import javax.lang.model.element.ExecutableElement;
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import javax.lang.model.element.Modifier;
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import javax.lang.model.element.PackageElement;
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import javax.lang.model.element.TypeElement;
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import javax.lang.model.element.VariableElement;
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import javax.lang.model.util.Elements;
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/**
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* Created by Aria.Lao on 2017/9/6.
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* 构建代理文件的参数获取工具
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*/
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class ParamObtainUtil {
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private Map<String, ProxyClassParam> mMethodParams = new HashMap<>();
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private Map<String, Set<String>> mListenerClass = new HashMap<>();
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private Elements mElementUtil;
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ParamObtainUtil(Elements elements) {
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mElementUtil = elements;
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}
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/**
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* 获取需要创建的代理类参数
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*/
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Map<String, Set<String>> getListenerClass() {
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return mListenerClass;
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}
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/**
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* 获取搜索到的代理方法参数
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*/
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Map<String, ProxyClassParam> getMethodParams() {
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return mMethodParams;
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}
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/**
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* 查找并保存扫描到的方法
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*/
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void saveMethod(TaskEnum taskEnum, RoundEnvironment roundEnv,
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Class<? extends Annotation> annotationClazz, int annotationType) {
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for (Element element : roundEnv.getElementsAnnotatedWith(annotationClazz)) {
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ElementKind kind = element.getKind();
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if (kind == ElementKind.METHOD) {
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ExecutableElement method = (ExecutableElement) element;
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TypeElement classElement = (TypeElement) method.getEnclosingElement();
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PackageElement packageElement = mElementUtil.getPackageOf(classElement);
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checkDownloadMethod(taskEnum, method);
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String methodName = method.getSimpleName().toString();
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String className = method.getEnclosingElement().toString(); //全类名\
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String key = className + taskEnum.proxySuffix;
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ProxyClassParam proxyEntity = mMethodParams.get(key);
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if (proxyEntity == null) {
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proxyEntity = new ProxyClassParam();
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proxyEntity.taskEnums = new HashSet<>();
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proxyEntity.packageName = packageElement.getQualifiedName().toString();
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proxyEntity.className = classElement.getSimpleName().toString();
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proxyEntity.proxyClassName = proxyEntity.className + taskEnum.proxySuffix;
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proxyEntity.mainTaskEnum = taskEnum;
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if (taskEnum == TaskEnum.DOWNLOAD_GROUP_SUB || taskEnum == TaskEnum.DOWNLOAD_GROUP) {
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proxyEntity.subTaskEnum = TaskEnum.DOWNLOAD;
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}
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mMethodParams.put(key, proxyEntity);
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}
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proxyEntity.taskEnums.add(taskEnum);
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if (proxyEntity.methods.get(taskEnum) == null) {
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proxyEntity.methods.put(taskEnum, new HashMap<Class<? extends Annotation>, String>());
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}
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proxyEntity.methods.get(taskEnum).put(annotationClazz, methodName);
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proxyEntity.keyMappings.put(methodName, getValues(taskEnum, method, annotationType));
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}
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}
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}
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/**
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* 获取注解的内容
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*/
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private Set<String> getValues(TaskEnum taskEnum, ExecutableElement method, int annotationType) {
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String clsName = method.getEnclosingElement().toString();
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String[] keys = null;
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switch (taskEnum) {
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case DOWNLOAD:
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keys = ValuesUtil.getDownloadValues(method, annotationType);
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addListenerMapping(clsName, ProxyConstance.COUNT_DOWNLOAD);
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break;
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case UPLOAD:
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keys = ValuesUtil.getUploadValues(method, annotationType);
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addListenerMapping(clsName, ProxyConstance.COUNT_UPLOAD);
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break;
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case DOWNLOAD_GROUP:
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keys = ValuesUtil.getDownloadGroupValues(method, annotationType);
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addListenerMapping(clsName, ProxyConstance.COUNT_DOWNLOAD_GROUP);
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break;
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case DOWNLOAD_GROUP_SUB:
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keys = ValuesUtil.getDownloadGroupSubValues(method, annotationType);
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addListenerMapping(clsName, ProxyConstance.COUNT_DOWNLOAD_GROUP_SUB);
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break;
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}
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return keys == null ? null : convertSet(keys);
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}
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/**
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* 添加方法映射
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*
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* @param clsName 注解事件的类
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* @param key {@link ProxyConstance#COUNT_DOWNLOAD}、{@link ProxyConstance#COUNT_UPLOAD}、{@link
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* ProxyConstance#COUNT_DOWNLOAD_GROUP}、{@link ProxyConstance#COUNT_DOWNLOAD_GROUP_SUB}
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*/
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void addListenerMapping(String clsName, String key) {
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Set<String> cls = mListenerClass.get(key);
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if (cls == null) {
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cls = new HashSet<>();
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mListenerClass.put(key, cls);
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}
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cls.add(clsName);
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}
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/**
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* 检查和下载相关的方法，如果被注解的方法为private或参数不合法，则抛异常
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*/
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private void checkDownloadMethod(TaskEnum taskEnum, ExecutableElement method) {
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String methodName = method.getSimpleName().toString();
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String className = method.getEnclosingElement().toString();
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Set<Modifier> modifiers = method.getModifiers();
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if (modifiers.contains(Modifier.PRIVATE)) {
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throw new IllegalAccessError(className + "." + methodName + "不能为private方法");
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}
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List<VariableElement> params = (List<VariableElement>) method.getParameters();
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if (taskEnum == TaskEnum.DOWNLOAD_GROUP_SUB) {
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if (params.size() != 2) {
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throw new IllegalArgumentException(className
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+ "."
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+ methodName
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+ "参数错误, 参数只有两个，且第一个参数必须是"
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+ getCheckParams(taskEnum)
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+ "，第二个参数必须是"
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+ getCheckSubParams(taskEnum));
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}
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} else {
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if (params.size() != 1) {
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throw new IllegalArgumentException(
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className + "." + methodName + "参数错误, 参数只能有一个，且参数必须是" + getCheckParams(taskEnum));
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}
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}
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if (!params.get(0).asType().toString().equals(getCheckParams(taskEnum))) {
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throw new IllegalArgumentException(className
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+ "."
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+ methodName
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+ "参数【"
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+ params.get(0).getSimpleName()
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+ "】类型错误，参数必须是"
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+ getCheckParams(taskEnum));
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}
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if (taskEnum == TaskEnum.DOWNLOAD_GROUP_SUB) {
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if (!params.get(1).asType().toString().equals(getCheckSubParams(taskEnum))) {
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throw new IllegalArgumentException(className
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+ "."
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+ methodName
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+ "参数【"
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+ params.get(0).getSimpleName()
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+ "】类型错误，参数必须是"
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+ getCheckSubParams(taskEnum));
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}
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}
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}
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/**
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* 字符串数组转set
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*
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* @param keys 注解中查到的key
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*/
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private Set<String> convertSet(final String[] keys) {
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if (keys == null || keys.length == 0) {
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return null;
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}
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if (keys[0].isEmpty()) return null;
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Set<String> set = new HashSet<>();
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Collections.addAll(set, keys);
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return set;
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}
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private String getCheckParams(TaskEnum taskEnum) {
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return taskEnum.pkg + "." + taskEnum.className;
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}
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/**
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* 检查任务组子任务第二个参数
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*/
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private String getCheckSubParams(TaskEnum taskEnum) {
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if (taskEnum == TaskEnum.DOWNLOAD_GROUP_SUB) {
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return TaskEnum.DOWNLOAD.pkg + "." + TaskEnum.DOWNLOAD.className;
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}
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return "";
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}
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}
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