121 lines
4.4 KiB
Java
121 lines
4.4 KiB
Java
package com.arialyy.compiler;
|
||
|
||
import com.arialyy.annotations.Download;
|
||
import com.arialyy.annotations.Upload;
|
||
import java.lang.annotation.Annotation;
|
||
import java.util.HashMap;
|
||
import java.util.HashSet;
|
||
import java.util.List;
|
||
import java.util.Map;
|
||
import java.util.Set;
|
||
import javax.annotation.processing.Filer;
|
||
import javax.annotation.processing.RoundEnvironment;
|
||
import javax.lang.model.element.Element;
|
||
import javax.lang.model.element.ElementKind;
|
||
import javax.lang.model.element.ExecutableElement;
|
||
import javax.lang.model.element.Modifier;
|
||
import javax.lang.model.element.VariableElement;
|
||
|
||
/**
|
||
* Created by lyy on 2017/6/6.
|
||
* 元素处理
|
||
*/
|
||
class ElementHandle {
|
||
|
||
private Filer mFiler;
|
||
private Map<String, Set<String>> mMethods = new HashMap<>();
|
||
|
||
ElementHandle(Filer filer) {
|
||
mFiler = filer;
|
||
}
|
||
|
||
/**
|
||
* VariableElement 一般代表成员变量
|
||
* ExecutableElement 一般代表类中的方法
|
||
* TypeElement 一般代表代表类
|
||
* PackageElement 一般代表Package
|
||
*/
|
||
void handleDownload(RoundEnvironment roundEnv) {
|
||
saveMethod(true, roundEnv, Download.onNoSupportBreakPoint.class);
|
||
saveMethod(true, roundEnv, Download.onPre.class);
|
||
saveMethod(true, roundEnv, Download.onTaskCancel.class);
|
||
saveMethod(true, roundEnv, Download.onTaskComplete.class);
|
||
saveMethod(true, roundEnv, Download.onTaskFail.class);
|
||
saveMethod(true, roundEnv, Download.onTaskPre.class);
|
||
saveMethod(true, roundEnv, Download.onTaskResume.class);
|
||
saveMethod(true, roundEnv, Download.onTaskRunning.class);
|
||
saveMethod(true, roundEnv, Download.onTaskStart.class);
|
||
saveMethod(true, roundEnv, Download.onTaskStop.class);
|
||
}
|
||
|
||
void handleUpload(RoundEnvironment roundEnv) {
|
||
saveMethod(false, roundEnv, Upload.onNoSupportBreakPoint.class);
|
||
saveMethod(false, roundEnv, Upload.onPre.class);
|
||
saveMethod(false, roundEnv, Upload.onTaskCancel.class);
|
||
saveMethod(false, roundEnv, Upload.onTaskComplete.class);
|
||
saveMethod(false, roundEnv, Upload.onTaskFail.class);
|
||
saveMethod(false, roundEnv, Upload.onTaskPre.class);
|
||
saveMethod(false, roundEnv, Upload.onTaskResume.class);
|
||
saveMethod(false, roundEnv, Upload.onTaskRunning.class);
|
||
saveMethod(false, roundEnv, Upload.onTaskStart.class);
|
||
saveMethod(false, roundEnv, Upload.onTaskStop.class);
|
||
}
|
||
|
||
void clean() {
|
||
mMethods.clear();
|
||
}
|
||
|
||
/**
|
||
* 查找并保存扫描到的方法
|
||
*/
|
||
private void saveMethod(boolean isDownload, RoundEnvironment roundEnv,
|
||
Class<? extends Annotation> annotationClazz) {
|
||
for (Element element : roundEnv.getElementsAnnotatedWith(annotationClazz)) {
|
||
ElementKind kind = element.getKind();
|
||
if (kind == ElementKind.METHOD) {
|
||
ExecutableElement method = (ExecutableElement) element;
|
||
checkDownloadMethod(isDownload, method);
|
||
String methodName = method.getSimpleName().toString();
|
||
String className = method.getEnclosingElement().toString();
|
||
Set<String> methods = mMethods.get(className);
|
||
if (methods == null) {
|
||
methods = new HashSet<>();
|
||
mMethods.put(className, methods);
|
||
}
|
||
methods.add(methodName);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
*/
|
||
private void checkDownloadMethod(boolean isDownload, ExecutableElement method) {
|
||
String methodName = method.getSimpleName().toString();
|
||
String className = method.getEnclosingElement().toString();
|
||
Set<Modifier> modifiers = method.getModifiers();
|
||
if (modifiers.contains(Modifier.PRIVATE)) {
|
||
throw new IllegalAccessError(className + "." + methodName + "不能为private方法");
|
||
}
|
||
List<VariableElement> params = (List<VariableElement>) method.getParameters();
|
||
if (params.size() > 1) {
|
||
throw new IllegalArgumentException(
|
||
className + "." + methodName + "参数错误, 参数只有一个，且参数必须是" + getCheckParams(isDownload));
|
||
}
|
||
if (!params.get(0).asType().toString().equals(getCheckParams(isDownload))) {
|
||
throw new IllegalArgumentException(className
|
||
+ "."
|
||
+ methodName
|
||
+ "参数【"
|
||
+ params.get(0).getSimpleName()
|
||
+ "】类型错误，参数必须是"
|
||
+ getCheckParams(isDownload));
|
||
}
|
||
}
|
||
|
||
private String getCheckParams(boolean isDownload) {
|
||
return isDownload ? "com.arialyy.aria.core.download.DownloadTask"
|
||
: "com.arialyy.aria.core.upload.UploadTask";
|
||
}
|
||
}
|