feat(maven): Add Maven registry protocol support (storage, auth, routing, interfaces, and exports)

ts/core/classes.registrystorage.ts

@@ -267,4 +267,129 @@ export class RegistryStorage implements IStorageBackend {
     const safeName = packageName.replace('@', '').replace('/', '-');
     return `npm/packages/${packageName}/${safeName}-${version}.tgz`;
   }
+
+  // ========================================================================
+  // MAVEN STORAGE METHODS
+  // ========================================================================
+
+  /**
+   * Get Maven artifact
+   */
+  public async getMavenArtifact(
+    groupId: string,
+    artifactId: string,
+    version: string,
+    filename: string
+  ): Promise<Buffer | null> {
+    const path = this.getMavenArtifactPath(groupId, artifactId, version, filename);
+    return this.getObject(path);
+  }
+
+  /**
+   * Store Maven artifact
+   */
+  public async putMavenArtifact(
+    groupId: string,
+    artifactId: string,
+    version: string,
+    filename: string,
+    data: Buffer
+  ): Promise<void> {
+    const path = this.getMavenArtifactPath(groupId, artifactId, version, filename);
+    return this.putObject(path, data);
+  }
+
+  /**
+   * Check if Maven artifact exists
+   */
+  public async mavenArtifactExists(
+    groupId: string,
+    artifactId: string,
+    version: string,
+    filename: string
+  ): Promise<boolean> {
+    const path = this.getMavenArtifactPath(groupId, artifactId, version, filename);
+    return this.objectExists(path);
+  }
+
+  /**
+   * Delete Maven artifact
+   */
+  public async deleteMavenArtifact(
+    groupId: string,
+    artifactId: string,
+    version: string,
+    filename: string
+  ): Promise<void> {
+    const path = this.getMavenArtifactPath(groupId, artifactId, version, filename);
+    return this.deleteObject(path);
+  }
+
+  /**
+   * Get Maven metadata (maven-metadata.xml)
+   */
+  public async getMavenMetadata(
+    groupId: string,
+    artifactId: string
+  ): Promise<Buffer | null> {
+    const path = this.getMavenMetadataPath(groupId, artifactId);
+    return this.getObject(path);
+  }
+
+  /**
+   * Store Maven metadata (maven-metadata.xml)
+   */
+  public async putMavenMetadata(
+    groupId: string,
+    artifactId: string,
+    data: Buffer
+  ): Promise<void> {
+    const path = this.getMavenMetadataPath(groupId, artifactId);
+    return this.putObject(path, data);
+  }
+
+  /**
+   * List Maven versions for an artifact
+   * Returns all version directories under the artifact path
+   */
+  public async listMavenVersions(
+    groupId: string,
+    artifactId: string
+  ): Promise<string[]> {
+    const groupPath = groupId.replace(/\./g, '/');
+    const prefix = `maven/artifacts/${groupPath}/${artifactId}/`;
+
+    const objects = await this.listObjects(prefix);
+    const versions = new Set<string>();
+
+    // Extract version from paths like: maven/artifacts/com/example/my-lib/1.0.0/my-lib-1.0.0.jar
+    for (const obj of objects) {
+      const relativePath = obj.substring(prefix.length);
+      const parts = relativePath.split('/');
+      if (parts.length >= 1 && parts[0]) {
+        versions.add(parts[0]);
+      }
+    }
+
+    return Array.from(versions).sort();
+  }
+
+  // ========================================================================
+  // MAVEN PATH HELPERS
+  // ========================================================================
+
+  private getMavenArtifactPath(
+    groupId: string,
+    artifactId: string,
+    version: string,
+    filename: string
+  ): string {
+    const groupPath = groupId.replace(/\./g, '/');
+    return `maven/artifacts/${groupPath}/${artifactId}/${version}/${filename}`;
+  }
+
+  private getMavenMetadataPath(groupId: string, artifactId: string): string {
+    const groupPath = groupId.replace(/\./g, '/');
+    return `maven/metadata/${groupPath}/${artifactId}/maven-metadata.xml`;
+  }
 }