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/*
* Copyright ©2015-2021 Jaemon. All Rights Reserved.
*
* 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.github.jaemon.dinger.utils;
import com.github.jaemon.dinger.core.spring.ApplicationHome;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import java.io.File;
import java.lang.annotation.Annotation;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.stream.Collectors;
/**
* PackageUtils
*
* @author Jaemon
* @since 1.0
*/
public class PackageUtils {
private static final Logger log = LoggerFactory.getLogger(PackageUtils.class);
private static final ApplicationHome applicationHome = new ApplicationHome();
public static final String SPOT = ".";
public static final String SLANT = "/";
private static final String JAR_FILE_SUFFIX = ".jar";
private PackageUtils() {}
/**
* 获取指定包下所有的类
*
* @param packageName packageName
* @param classNames classNames
* @param isInterface isInterface
* @param filterAnnotations filterAnnotations
*/
public static void classNames(
String packageName,
List> classNames,
boolean isInterface,
Class... filterAnnotations
) {
if (DingerUtils.isEmpty(packageName)) {
return;
}
File applicationHomeSource = applicationHome.getSource();
if (applicationHomeSource != null) {
String absolutePath = applicationHomeSource.getAbsolutePath();
if (absolutePath.endsWith(JAR_FILE_SUFFIX)) {
jarClassNames(absolutePath, packageName, classNames, isInterface, filterAnnotations);
return;
}
}
forClassNames(packageName, classNames, isInterface, filterAnnotations);
}
/**
* forClassNames
*
* @param packageName packageName
* @param classNames classNames
* @param isInterface isInterface
* @param filterAnnotations filterAnnotations
*/
public static void forClassNames(
String packageName,
List> classNames,
boolean isInterface,
Class... filterAnnotations)
{
// 处理过滤掉dingerScan和Dinger解析时重复的类
List repeatCheck = classNames.stream().map(e -> e.getName()).collect(Collectors.toList());
try {
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
URL url = classLoader.getResource(packageName.replace(SPOT, SLANT));
// packageName is not exist
if (url == null) {
if (log.isDebugEnabled()) {
log.debug("packageName={} is not exist.", packageName);
}
return;
}
URI uri = url.toURI();
File file = new File(uri);
File[] files = file.listFiles();
for (File f : files) {
String name = f.getName();
if (f.isFile()) {
String className = packageName + SPOT + name.substring(0, name.lastIndexOf(SPOT));
// bugfix gitee#I29N15
Class clazz = classLoader.loadClass(className);
// clazz.isInterface(): XXXDinger.java must be an interface
boolean check = isInterface ? clazz.isInterface() : true;
if (check) {
if (filterAnnotations.length > 0) {
for (Class annotation : filterAnnotations) {
if (clazz.isAnnotationPresent(annotation)) {
if (!repeatCheck.contains(className)) {
classNames.add(clazz);
}
break;
}
}
} else {
if (!repeatCheck.contains(className)) {
classNames.add(clazz);
}
}
} else {
if (log.isTraceEnabled()) {
log.trace("skip class {}.", clazz.getName());
}
}
} else {
forClassNames(packageName + SPOT + name, classNames, isInterface, filterAnnotations);
}
}
} catch (Exception ex) {
if (log.isDebugEnabled()) {
log.error("when analysis packageName={} catch exception=",
packageName, ex);
} else {
log.warn("when analysis packageName={} catch exception={}.",
packageName, ex.getMessage());
}
}
}
/**
* jarClassNames
*
* @param jarPath jarPath
* @param packageName packageName
* @param classNames classNames
* @param isInterface isInterface
* @param filterAnnotations filterAnnotations
*/
public static void jarClassNames(
String jarPath,
String packageName,
List> classNames,
boolean isInterface,
Class... filterAnnotations)
{
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
// 处理过滤掉dingerScan和Dinger解析时重复的类
List repeatCheck = classNames.stream().map(e -> e.getName()).collect(Collectors.toList());
packageName = packageName.replace(SPOT, SLANT);
try {
JarFile jarFile = new JarFile(jarPath);
Enumeration entries = jarFile.entries();
while (entries.hasMoreElements()) {
JarEntry jarEntry = (JarEntry) entries.nextElement();
String namePath = jarEntry.getName();
if (namePath.contains(packageName) &&
namePath.endsWith(".class") /*&& !namePath.contains("$")*/) {
namePath = namePath.substring(namePath.indexOf(packageName));
String className = namePath.replaceAll("/", ".").replace(".class", "");
// bugfix gitee#I29N15
Class clazz = classLoader.loadClass(className);
boolean check = isInterface ? clazz.isInterface() : true;
if (check) {
if (filterAnnotations.length > 0) {
for (Class annotation : filterAnnotations) {
if (clazz.isAnnotationPresent(annotation)) {
if (!repeatCheck.contains(className)) {
classNames.add(clazz);
}
break;
}
}
} else {
if (!repeatCheck.contains(className)) {
classNames.add(clazz);
}
}
} else {
if (log.isTraceEnabled()) {
log.trace("skip class {}.", clazz.getName());
}
}
}
}
} catch (Exception ex) {
log.error("when analysis packageName={} catch exception=",
packageName, ex);
}
}
private static final String DEFAULT_RESOURCE_PATTERN = "**/*.class";
/**
* doScan
*
* @param packageName packageName
* @param classNames classNames
* @param filterAnnotations filterAnnotations
* @throws Exception ex
*/
private static void doScan(
String packageName,
List> classNames,
Class... filterAnnotations)
{
List repeatCheck = classNames.stream().map(e -> e.getName()).collect(Collectors.toList());
String packageSearchPath = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX +
packageName.replace(SPOT, SLANT) + '/' + DEFAULT_RESOURCE_PATTERN;
try {
Resource[] resources = new PathMatchingResourcePatternResolver().getResources(packageSearchPath);
for (Resource resource : resources) {
File f = resource.getFile();
String name = f.getName();
if (f.isFile()) {
String className = packageName + SPOT + name.substring(0, name.lastIndexOf(SPOT));
Class clazz = Class.forName(className);
if (filterAnnotations.length > 0) {
for (Class annotation : filterAnnotations) {
if (clazz.isAnnotationPresent(annotation)) {
if (!repeatCheck.contains(className)) {
classNames.add(clazz);
}
break;
}
}
} else {
if (!repeatCheck.contains(className)) {
classNames.add(clazz);
}
}
} else {
doScan(packageName + SPOT + name, classNames, filterAnnotations);
}
}
} catch (Exception ex) {
log.error("when analysis packageName={} catch exception=",
packageName, ex);
}
}
public static void main(String[] args) {
List> classNames = new ArrayList<>();
classNames("com.jaemon.dinger", classNames, false);
classNames.forEach(e -> System.out.println(e.getName()));
System.out.println(classNames.size());
}
}