/**
 * Contains metadata about an artifact, and methods to retrieve/store it from an artifact repository.
 * TODO merge with artifactmetadatasource
 * TODO retrieval exception not appropriate for store
 *
 */
public interface ArtifactMetadata {
    /**
     * Whether this metadata should be stored alongside the artifact.
     *
     * @return whether this metadata should be stored alongside the artifact
     */

**/target/**
.project
.classpath
.settings/
.svn/
# Intellij
*.ipr
*.iml
.idea
.DS_Store
/bootstrap
/dependencies.xml
.java-version
.checkstyle
.factorypath
.vscode/
repo/

 */
@Experimental
@ThreadSafe
@Provider
public interface SessionData {

    /**
     * Associates the specified session data with the given key.
     *
     * @param key the key under which to store the session data, must not be {@code null}
     * @param value the data to associate with the key, may be {@code null} to remove the mapping
     */
    <T> void set(@Nonnull Key<T> key, @Nullable T value);

    /**

  <id>extension</id>
  <name>ExtensionDescriptor</name>
  <description><![CDATA[
    Extension descriptor, stored in <code>META-INF/maven/extension.xml</code> in an extension's jar artifact to
    precisely control parts of the extension and dependencies to expose in the API class loader.

            // of the form:
            //
            // mvn remote-resources:process
            //
            // From the metadata stored on the server which has been created as part of a standard
            // Maven plugin deployment we will find the right PluginDescriptor from the remote
            // repository.

    /**
     * Gets the relative path for a locally installed artifact. Note that the artifact need not actually exist yet at
     * the returned location, the path merely indicates where the artifact would eventually be stored.
     * <p>
     * Shortcut for {@code getService(LocalArtifactManager.class).getPathForLocalArtitact(...)}.
     *
     * @param artifact the artifact for which to get a local path

                RepositorySystemSession repositorySystemSession =
                        executionEvent.getSession().getRepositorySession();
                validationReportLevel(repositorySystemSession); // this will parse and store it in session.data
                validationPluginExcludes(repositorySystemSession);
            } else if (executionEvent.getType() == ExecutionEvent.Type.SessionEnded) {

            } catch (PluginVersionResolutionException e) {
                throw new PluginManagerException(plugin, e.getMessage(), e);
            }
        }

        // TODO: store plugin version

        // resolve plugin artifacts
        List<Artifact> artifacts;
        PluginArtifactsCache.Key cacheKey = pluginArtifactsCache.createKey(plugin, null, repositories, session);

      <fields>
        <field>
          <name>directory</name>
          <version>3.0.0+</version>
          <description>Describe the directory where the resources are stored. The path is relative
            to the POM.</description>
          <type>String</type>
        </field>
      </fields>
      <codeSegments>
        <codeSegment>
          <version>4.0.0+</version>

  xml.schemaLocation="https://maven.apache.org/xsd/plugin-${version}.xsd">
  <id>plugin</id>
  <name>PluginDescriptor</name>
  <description><![CDATA[
    Maven 4 Plugin descriptor, stored in {@code META-INF/maven/plugin.xml} in a plugin's jar artifact.
    This descriptor is generally using the information contained in the annotations of the plugin api.