Added example for 'UPackApi'

- added example for 'upack'
- typo maven md

examples/MavenApi.md

@@ -1,4 +1,4 @@
-# Feed Management
+# Maven
 
 - [REST API](https://docs.microsoft.com/en-us/rest/api/azure/devops/artifactspackagetypes/maven?view=azure-devops-rest-7.1)
 - API Version: 7.1

examples/UPackApi.md

@@ -0,0 +1,90 @@
+# Unviersal Package
+
+- [REST API](https://docs.microsoft.com/en-us/rest/api/azure/devops/artifactspackagetypes/universal?view=azure-devops-rest-7.1)
+- API Version: 7.1
+
+## Example
+
+Before getting started you require personal access token to authenticate with **Azure DevOps** services REST API.
+You can grab one by following the [documentation](https://docs.microsoft.com/en-us/azure/devops/organizations/accounts/use-personal-access-tokens-to-authenticate?WT.mc_id=docs-github-dbrown&view=azure-devops&tabs=preview-page).
+
+You can omit the project name for calling Universal Package API as it is not a mandatory parameter.
+If you do omit the project name you will end up working with feeds across your organisation.
+Provide the project name if you want to work with feeds scoped to a project. You can always set the
+project name parameter pointing to different project by creating a 'Connection' object.
+
+```java
+public class Main {
+    public static void main(String[] args) {
+        String organisation = "myOrganisationName";
+        String project = "myProject";
+        String personalAccessToken = "accessToken";
+
+        // Connect Azure DevOps API with organisation name and personal access token.
+        var webApi = new AzDClientApi(organisation, project, personalAccessToken);
+
+        // call the respective API with created webApi client connection object;
+        var upack = webApi.getUPackApi();
+        try {
+            // Get information about a package
+            upack.getPackageVersion("myFeed", "myPackageName", "1.0.0");
+
+            // Download a package (to be implemented)
+            //upack.downloadPackage("myFeed", "myPackageName", "1.0.0");
+
+            // Get information about a deleted package.
+            upack.getPackageVersion("myFeed", "myPackageName", "1.0.0", true);
+
+            // get information about a package in the recycle bin.
+            upack.getPackageVersionFromRecycleBin("myFeed", "myPackageName", "1.0.0");
+
+            // Update state for a package version.
+            upack.updatePackageVersion("myFeed", "myPackageName", "1.0.0", PackagePromote.RELEASE);
+
+            // Update state for a package version. If you have a custom View,
+            upack.updatePackageVersion("myFeed", "myPackageName", "1.0.0", "CustomView");
+
+            // Delete a package version from the feed and move it to the feed's recycle bin.
+            upack.deletePackageVersion("myFeed", "myPackageName", "1.0.0");
+
+            // Restore a package version from the recycle bin to its associated feed.
+            upack.restorePackageVersionFromRecycleBin("myFeed", "myPackageName", "1.0.0");
+
+            // Permanently delete a package from a feed's recycle bin.
+            upack.deletePackageVersionFromRecycleBin("myFeed", "myPackageName", "1.0.0")
+
+            /*
+             * PackagesBatch section.
+             */
+            List packages = new ArrayList<>();
+
+            Map<String, Object> p1 = new HashMap<>();
+            p1.put("id", "myPackageName1");
+            p1.put("version", "1.0.0");
+            packages.add(p1);
+
+            Map<String, Object> p2 = new HashMap<>();
+            p2.put("id", "myPackageName2");
+            p2.put("version", "1.0.0");
+            packages.add(p2);
+
+            // Promote packages to Release from the feed.
+            upack.updatePackageVersions("myFeed", "Release", PackagesBatchOperation.PROMOTE, packages)
+
+            // Delete packages from the feed and move it to the feed's recycle bin. (ViewId will be ignored))
+            upack.updatePackageVersions("myFeed", "Release", PackagesBatchOperation.DELETE, packages)
+
+            // Permanently delete packages from a feed's recycle bin.
+            upack.updateRecycleBinPackages("myFeed", PackagesBatchOperation.PERMANENTDELETE, packages)
+
+            // Restore packages from the recycle bin to its associated feed.
+            upack.updateRecycleBinPackages("myFeed", PackagesBatchOperation.RESTORETOFEED, packages)
+        }
+
+        catch (AzDException e1) {
+            e1.printStackTrace();
+        }
+    }
+}
+
+```