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src/main/java/com/github/jaemon/dinger/core/ClassPathScanForResources.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| /* | ||
| * Copyright ©2015-2020 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.core; | ||
|
|
||
| import com.github.jaemon.dinger.exception.DingerException; | ||
| 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 org.springframework.core.type.ClassMetadata; | ||
| import org.springframework.core.type.classreading.MetadataReader; | ||
| import org.springframework.core.type.classreading.SimpleMetadataReaderFactory; | ||
| import org.springframework.util.ClassUtils; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| import static com.github.jaemon.dinger.core.entity.enums.ExceptionEnum.RESOURCE_CONFIG_EXCEPTION; | ||
|
|
||
| /** | ||
| * ClassPathScanForResources | ||
| * | ||
| * @author Jaemon | ||
| * @since 1.0 | ||
| */ | ||
| public final class ClassPathScanForResources { | ||
| private static final Logger log = LoggerFactory.getLogger(ClassPathScanForResources.class); | ||
| private static final String CLASSPATH_ALL_URL_PREFIX = "classpath*:"; | ||
| private static final String DEFAULT_RESOURCE_PATTERN = "**/*.class"; | ||
| private static final ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); | ||
|
|
||
| /** | ||
| * 扫描包 | ||
| * | ||
| * @param packageSearchPath | ||
| * 扫描的包路径， <code>classpath*:com.jaemon.dinger/**\/*.class</code> | ||
| * @return | ||
| * 包下的所有资源文件集 | ||
| */ | ||
| public static Resource[] doScanPackage(String packageSearchPath) { | ||
| try { | ||
| return resolver.getResources(packageSearchPath); | ||
| } catch (IOException ex) { | ||
| log.error(packageSearchPath, ex); | ||
| throw new DingerException(RESOURCE_CONFIG_EXCEPTION, packageSearchPath); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * @param basePackage | ||
| * 包名， eg： <code>com.jaemon.dinger</code> | ||
| * @return | ||
| * 包下的所有接口集合 | ||
| */ | ||
| public static List<Class<?>> scanInterfaces(String basePackage) { | ||
| return scanClasses(basePackage, true); | ||
| } | ||
|
|
||
|
|
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| /** | ||
| * @param basePackage | ||
| * 包名， eg： <code>com.jaemon.dinger</code> | ||
| * @return | ||
| * 包下的所有类集合 | ||
| */ | ||
| public static List<Class<?>> scanClasses(String basePackage) { | ||
| return scanClasses(basePackage, false); | ||
| } | ||
|
|
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|
|
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| /** | ||
| * @param basePackage | ||
| * 包名， eg： <code>com.jaemon.dinger</code> | ||
| * @param filterInterface | ||
| * 是否过滤接口 | ||
| * @return | ||
| * 包下的所有类集合 | ||
| */ | ||
| private static List<Class<?>> scanClasses(String basePackage, boolean filterInterface) { | ||
| boolean debugEnabled = log.isDebugEnabled(); | ||
| String packageSearchPath = CLASSPATH_ALL_URL_PREFIX + | ||
| resolveBasePackage(basePackage) + "/" + DEFAULT_RESOURCE_PATTERN; | ||
| Resource[] resources = doScanPackage(packageSearchPath); | ||
|
|
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| List<Class<?>> classes = new ArrayList<>(); | ||
|
|
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| if (resources.length == 0) { | ||
| return classes; | ||
| } | ||
|
|
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| SimpleMetadataReaderFactory factory = new SimpleMetadataReaderFactory(); | ||
| for (Resource resource : resources) { | ||
| String resourceFilename = resource.getFilename(); | ||
| if (!resource.isReadable()) { | ||
| if (debugEnabled) { | ||
| log.debug("Ignored because not readable: {} ", resourceFilename); | ||
| } | ||
| continue; | ||
| } | ||
| try { | ||
| MetadataReader metadataReader = factory.getMetadataReader(resource); | ||
| ClassMetadata classMetadata = metadataReader.getClassMetadata(); | ||
| Class<?> clazz = Class.forName(classMetadata.getClassName()); | ||
| if (filterInterface && !clazz.isInterface()) { | ||
| if (debugEnabled) { | ||
| log.debug("source class={} is interface and skip.", resourceFilename); | ||
| } | ||
| continue; | ||
| } | ||
| classes.add(clazz); | ||
| } catch (IOException | ClassNotFoundException e) { | ||
| log.warn("resource={} read exception and message={}.", resourceFilename, e.getMessage()); | ||
| continue; | ||
| } | ||
| } | ||
| return classes; | ||
| } | ||
|
|
||
| private static String resolveBasePackage(String basePackage) { | ||
| return ClassUtils.convertClassNameToResourcePath(basePackage); | ||
| } | ||
| } |
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