if (pathname.length() == 0) {
      return ".";
    }

    // split the path apart
    Iterable<String> components = Splitter.on('/').omitEmptyStrings().split(pathname);
    List<String> path = new ArrayList<>();

    // resolve ., .., and //
    for (String component : components) {
      switch (component) {
        case ".":
          continue;
        case "..":

    <artifactId>maven-impl-modules</artifactId>
    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-cli</artifactId>

  <name>Maven 4 CLI</name>
  <description>Maven 4 CLI component, with CLI and logging support.</description>

  <dependencies>
    <!--  Maven4 API -->
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-annotations</artifactId>

通过依赖注入系统，只要告诉 **FastAPI** *路径操作函数* 还要「依赖」其他在*路径操作函数*之前执行的内容，**FastAPI** 就会执行函数代码，并「注入」函数返回的结果。

其他与「依赖注入」概念相同的术语为：

* 资源（Resource）
* 提供方（Provider）
* 服务（Service）
* 可注入（Injectable）
* 组件（Component）

## **FastAPI** 插件

**依赖注入**系统支持构建集成和「插件」。但实际上，FastAPI 根本**不需要创建「插件」**，因为使用依赖项可以声明不限数量的、可用于*路径操作函数*的集成与交互。

创建依赖项非常简单、直观，并且还支持导入 Python 包。毫不夸张地说，只要几行代码就可以把需要的 Python 包与 API 函数集成在一起。

import org.apache.maven.plugin.prefix.NoPluginFoundForPrefixException;
import org.apache.maven.plugin.version.PluginVersionResolutionException;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;

/**
 */
public class LifecycleExecutionPlanCalculatorStub implements LifecycleExecutionPlanCalculator {
    // clean

	var notFoundHandler http.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		http.Error(w, "Metrics Resource Not found", http.StatusNotFound)
	})

	// Require that metrics path has one component at least.
	if path == "/" {
		return notFoundHandler
	}

	if isListingRequest {
		handler := h.listMetrics(path)
		if handler == nil {
			return notFoundHandler
		}
		return handler
	}

import org.apache.maven.wagon.proxy.ProxyInfo;
import org.apache.maven.wagon.repository.Repository;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.repository.exception.ComponentLifecycleException;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import org.codehaus.plexus.logging.Logger;
import org.eclipse.aether.ConfigurationProperties;
import org.eclipse.aether.util.ConfigUtils;

        this.mojoExecutionListener = new CompoundMojoExecutionListener(mojoExecutionListeners);
    }

    /**
     * @param plugin
     * @param repositories
     * @param session
     * @return PluginDescriptor The component descriptor for the Maven plugin.
     * @throws PluginNotFoundException The plugin could not be found in any repositories.
     * @throws PluginResolutionException The plugin could be found but could not be resolved.

import org.apache.maven.project.DuplicateProjectException;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.MutablePlexusContainer;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
import org.codehaus.plexus.configuration.DefaultPlexusConfiguration;
import org.codehaus.plexus.util.Os;
import org.eclipse.aether.DefaultRepositorySystemSession;

     */
    public NtlmPasswordAuthentication(final CIFSContext tc) {
        this(tc, "", "", "");
    }

    /**
     * Create an {@code NtlmPasswordAuthentication} object from the userinfo
     * component of an SMB URL like "{@code domain;user:pass}". This constructor
     * is used internally be jCIFS when parsing SMB URLs.
     *
     * @param tc the CIFS context to use

- artifact retrieval exception
- md5 checksum doesn't match for local artifact, need to redownload this
- POM doesn't exist for a goal that requires one
- parent POM missing (in both the repository + relative path)
- component not found

Plugins:
- plugin metadata missing
- plugin metadata retrieval problem
- plugin artifact missing
- plugin artifact retrieval problem
- plugin dependency metadata missing