java - ReflectionsException : Could not get type for name org. gradle.api.Plugin

Question

我已经实现了自定义 Gradle 插件并且它可以工作，但是在 Gradle 构建期间我有一个 ReflectionsException: Could not get the type for name org.gradle.api.Plugin因为反射扫描。为什么类加载器看不到类型？

Caused by: java.lang.ClassNotFoundException: org.gradle.api.Plugin
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.reflections.ReflectionUtils.forName(ReflectionUtils.java:388)

自定义插件实现Plugin<Project>如下所示:

//CommonGradlePlugin
import org.gradle.api.Plugin;
import org.gradle.api.Project; 

public class CommonGradlePlugin implements Plugin<Project> {
    //...
}

Answer 1

Why class loader doesn't see the type?

我想 gradle 类不包含在编译/运行时类路径中，只是因为它是一个构建工具。这就是 Reflections 无法找到 gradle 类的原因。

您可以使用 Reflection 的 ConfigurationBuilder 排除带有 gradle 插件的包:

ConfigurationBuilder configurationBuilder = new ConfigurationBuilder();
FilterBuilder filterBuilder = new FilterBuilder();

configurationBuilder.addUrls(ClasspathHelper.forPackage(PACKAGE_TO_SCAN));
filterBuilder
        .includePackage(PACKAGE_TO_SCAN)
        .excludePackage(PACKAGE_TO_EXCLUDE);
configurationBuilder.filterInputsBy(filterBuilder);

Reflections reflections = new Reflections(configurationBuilder);