package com.mogujie.trade.tsharding.route.orm.base;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Enumeration;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.regex.Pattern;
/**
* 扫描指定包（包括jar）下的class文件 <br>
* http://www.micmiu.com
*
* @author michael
*/
public class ClassPathScanHandler {
/**
* logger
*/
private static final Logger logger = LoggerFactory.getLogger(ClassPathScanHandler.class);
/**
* 是否排除内部类 true->是 false->否
*/
private boolean excludeInner = true;
/**
* 过滤规则适用情况 true—>搜索符合规则的 false->排除符合规则的
*/
private boolean checkInOrEx = true;
/**
* 过滤规则列表 如果是null或者空，即全部符合不过滤
*/
private List<String> classFilters = null;
/**
* 无参构造器，默认是排除内部类、并搜索符合规则
*/
public ClassPathScanHandler() {
}
/**
* excludeInner:是否排除内部类 true->是 false->否<br>
* checkInOrEx：过滤规则适用情况 true—>搜索符合规则的 false->排除符合规则的<br>
* classFilters：自定义过滤规则，如果是null或者空，即全部符合不过滤
*
* @param excludeInner
* @param checkInOrEx
* @param classFilters
*/
public ClassPathScanHandler(Boolean excludeInner, Boolean checkInOrEx, List<String> classFilters) {
this.excludeInner = excludeInner;
this.checkInOrEx = checkInOrEx;
this.classFilters = classFilters;
}
/**
* 扫描包
*
* @param basePackage
* 基础包
* @param recursive
* 是否递归搜索子包
* @return Set
*/
public Set<Class<?>> getPackageAllClasses(String basePackage, boolean recursive) {
Set<Class<?>> classes = new LinkedHashSet<Class<?>>();
String packageName = basePackage;
if (packageName.endsWith(".")) {
packageName = packageName.substring(0, packageName.lastIndexOf('.'));
}
String package2Path = packageName.replace('.', '/');
Enumeration<URL> dirs;
try {
dirs = Thread.currentThread().getContextClassLoader().getResources(package2Path);
while (dirs.hasMoreElements()) {
URL url = dirs.nextElement();
String protocol = url.getProtocol();
if ("file".equals(protocol)) {
logger.info("扫描file类型的class文件....");
String filePath = URLDecoder.decode(url.getFile(), "UTF-8");
doScanPackageClassesByFile(classes, packageName, filePath, recursive);
} else if ("jar".equals(protocol)) {
logger.info("扫描jar文件中的类....");
doScanPackageClassesByJar(packageName, url, recursive, classes);
}
}
} catch (IOException e) {
logger.error("IOException error:", e);
}
return classes;
}
/**
* 以jar的方式扫描包下的所有Class文件<br>
*
* @param basePackage
* eg：michael.utils.
* @param url
* @param recursive
* @param classes
*/
private void doScanPackageClassesByJar(String basePackage, URL url, final boolean recursive, Set<Class<?>> classes) {
String packageName = basePackage;
String package2Path = packageName.replace('.', '/');
JarFile jar;
try {
jar = ((JarURLConnection) url.openConnection()).getJarFile();
Enumeration<JarEntry> entries = jar.entries();
while (entries.hasMoreElements()) {
JarEntry entry = entries.nextElement();
String name = entry.getName();
if (!name.startsWith(package2Path) || entry.isDirectory()) {
continue;
}
// 判断是否递归搜索子包
if (!recursive && name.lastIndexOf('/') != package2Path.length()) {
continue;
}
// 判断是否过滤 inner class
if (this.excludeInner && name.indexOf('$') != -1) {
logger.info("exclude inner class with name:" + name);
continue;
}
String classSimpleName = name.substring(name.lastIndexOf('/') + 1);
// 判定是否符合过滤条件
if (this.filterClassName(classSimpleName)) {
String className = name.replace('/', '.');
className = className.substring(0, className.length() - 6);
try {
classes.add(Thread.currentThread().getContextClassLoader().loadClass(className));
} catch (ClassNotFoundException e) {
logger.error("Class.forName error:", e);
}
}
}
} catch (IOException e) {
logger.error("IOException error:", e);
}
}
/**
* 以文件的方式扫描包下的所有Class文件
*
* @param packageName
* @param packagePath
* @param recursive
* @param classes
*/
private void doScanPackageClassesByFile(Set<Class<?>> classes, String packageName, String packagePath,
boolean recursive) {
File dir = new File(packagePath);
if (!dir.exists() || !dir.isDirectory()) {
return;
}
final boolean fileRecursive = recursive;
File[] dirfiles = dir.listFiles(new FileFilter() {
// 自定义文件过滤规则
@Override
public boolean accept(File file) {
if (file.isDirectory()) {
return fileRecursive;
}
String filename = file.getName();
if (excludeInner && filename.indexOf('$') != -1) {
logger.info("exclude inner class with name:" + filename);
return false;
}
return filterClassName(filename);
}
});
for (File file : dirfiles) {
if (file.isDirectory()) {
doScanPackageClassesByFile(classes, packageName + "." + file.getName(), file.getAbsolutePath(),
recursive);
} else {
String className = file.getName().substring(0, file.getName().length() - 6);
try {
classes.add(Thread.currentThread().getContextClassLoader().loadClass(packageName + '.' + className));
} catch (ClassNotFoundException e) {
logger.error("IOException error:", e);
}
}
}
}
/**
* 根据过滤规则判断类名
*
* @param className
* @return
*/
private boolean filterClassName(String className) {
if (!className.endsWith(".class")) {
return false;
}
if (null == this.classFilters || this.classFilters.isEmpty()) {
return true;
}
String tmpName = className.substring(0, className.length() - 6);
boolean flag = false;
for (String str : classFilters) {
String tmpreg = "^" + str.replace("*", ".*") + "$";
Pattern p = Pattern.compile(tmpreg);
if (p.matcher(tmpName).find()) {
flag = true;
break;
}
}
return checkInOrEx && flag || !checkInOrEx && !flag;
}
/**
* @return the excludeInner
*/
public boolean isExcludeInner() {
return excludeInner;
}
/**
* @return the checkInOrEx
*/
public boolean isCheckInOrEx() {
return checkInOrEx;
}
/**
* @return the classFilters
*/
public List<String> getClassFilters() {
return classFilters;
}
/**
* @param pExcludeInner
* the excludeInner to set
*/
public void setExcludeInner(boolean pExcludeInner) {
excludeInner = pExcludeInner;
}
/**
* @param pCheckInOrEx
* the checkInOrEx to set
*/
public void setCheckInOrEx(boolean pCheckInOrEx) {
checkInOrEx = pCheckInOrEx;
}
/**
* @param pClassFilters
* the classFilters to set
*/
public void setClassFilters(List<String> pClassFilters) {
classFilters = pClassFilters;
}
}