Added ReleaseLinks API (#639)

src/main/java/org/gitlab4j/api/GitLabApi.java

@@ -83,6 +83,7 @@ public String getApiNamespace() {
     private PipelineApi pipelineApi;
     private ProjectApi projectApi;
     private ProtectedBranchesApi protectedBranchesApi;
+	private ReleaseLinksApi releaseLinksApi;
     private ReleasesApi releasesApi;
     private RepositoryApi repositoryApi;
     private RepositoryFileApi repositoryFileApi;
@@ -1444,6 +1445,25 @@ public ProtectedBranchesApi getProtectedBranchesApi() {
         return (this.protectedBranchesApi);
     }
 
+    /**
+     * Gets the ReleaseLinksApi instance owned by this GitLabApi instance. The ReleaseLinksApi is used
+     * to perform all Release Links related API calls.
+     *
+     * @return the ReleaseLinksApi instance owned by this GitLabApi instance
+     */
+    public ReleaseLinksApi getReleaseLinksApi() {
+
+        if (releaseLinksApi == null) {
+            synchronized (this) {
+                if (releaseLinksApi == null) {
+                    releaseLinksApi = new ReleaseLinksApi(this);
+                }
+            }
+        }
+
+        return releaseLinksApi;
+    }
+
     /**
      * Gets the ReleasesApi instance owned by this GitLabApi instance. The ReleasesApi is used
      * to perform all release related API calls.

src/main/java/org/gitlab4j/api/ReleaseLinksApi.java

@@ -0,0 +1,170 @@
+package org.gitlab4j.api;
+
+import org.gitlab4j.api.models.Link;
+import org.gitlab4j.api.models.ReleaseLinkParams;
+
+import javax.ws.rs.core.Response;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+
+/**
+ * This class provides an entry point to all the GitLab ReleaseLinks API calls.
+ * @see <a href="https://docs.gitlab.com/ce/api/releases/links.html">ReleaseLinks API at GitLab</a>
+ */
+public class ReleaseLinksApi extends AbstractApi {
+
+    public ReleaseLinksApi(GitLabApi gitLabApi) {
+        super(gitLabApi);
+    }
+
+    /**
+     * Get assets as Links from a Release.
+     *
+     * <pre><code>GitLab Endpoint: GET /projects/:id/releases/:tagName/assets/links</code></pre>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @param tagName the tag name that the release was created from
+     * @return the list of assets for the specified release
+     * @throws GitLabApiException if any exception occurs
+     */
+    public List<Link> getLinks(Object projectIdOrPath, String tagName) throws GitLabApiException {
+        return (getLinks(projectIdOrPath, tagName, getDefaultPerPage()).all());
+    }
+
+    /**
+     * Get assets as Links from a Release.
+     *
+     * <pre><code>GitLab Endpoint: GET /projects/:id/releases/:tagName/assets/links</code></pre>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @param tagName the tag name that the release was created from
+     * @param itemsPerPage the number of Link instances that will be fetched per page
+     * @return the Pager of Link instances for the specified project ID
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Pager<Link> getLinks(Object projectIdOrPath, String tagName, int itemsPerPage) throws GitLabApiException {
+        return (new Pager<Link>(this, Link.class, itemsPerPage, null, "projects", getProjectIdOrPath(projectIdOrPath), "releases", urlEncode(tagName), "assets", "links"));
+    }
+
+    /**
+     * Get a Stream of assets as Links from a Release.
+     *
+     * <pre><code>GitLab Endpoint: GET /projects/:id/releases/:tagName/assets/links</code></pre>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @param tagName the tag name that the release was created from
+     * @return a Stream of Link instances for the specified project ID
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Stream<Link> getLinksStream(Object projectIdOrPath, String tagName) throws GitLabApiException {
+        return (getLinks(projectIdOrPath, tagName, getDefaultPerPage()).stream());
+    }
+
+    /**
+     * Get a Link for the given tag name and link id.
+     *
+     * <pre><code>GitLab Endpoint: GET /projects/:id/releases/:tagName/assets/links/:linkId</code></pre>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @param tagName the name of the tag to fetch the Link for
+     * @param linkId the id of the Link to fetch for
+     * @return a Link instance with info on the specified tag and id
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Link getLink(Object projectIdOrPath, String tagName, Integer linkId) throws GitLabApiException {
+        Response response = get(Response.Status.OK, null, "projects", getProjectIdOrPath(projectIdOrPath), "releases", urlEncode(tagName), "assets", "links", linkId);
+        return (response.readEntity(Link.class));
+    }
+
+    /**
+     * Get an Optional instance holding a Link instance for the specific tag name and link id.
+     *
+     * <pre><code>GitLab Endpoint: GET /projects/:id/releases/:tagName/assets/links/:linkId</code></pre>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @param tagName the name of the tag to fetch the Link for
+     * @param linkId the id of the Link to fetch for
+     * @return an Optional instance with the specified Link as the value
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Optional<Link> getOptionalLink(Object projectIdOrPath, String tagName, Integer linkId) throws GitLabApiException {
+        try {
+            return (Optional.ofNullable(getLink(projectIdOrPath, tagName, linkId)));
+        } catch (GitLabApiException glae) {
+            return (GitLabApi.createOptionalFromException(glae));
+        }
+    }
+
+    /**
+     * Create a Link. You need push access to the repository to create a Link.
+     *
+     * <pre><code>GitLab Endpoint: POST /projects/:id/releases/:tagName/assets/links</code></pre>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @param params a ReleaseLinksParams instance holding the parameters for the link
+     * @return a Link instance containing the newly created Link info
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Link createLink(Object projectIdOrPath, ReleaseLinkParams params) throws GitLabApiException {
+        String tagName = params.getTagName();
+        if (tagName == null || tagName.trim().isEmpty()) {
+            throw new RuntimeException("params.tagName cannot be null or empty");
+        }
+
+        String name = params.getName();
+        if (name == null || name.trim().isEmpty()) {
+            throw new RuntimeException("params.name cannot be null or empty");
+        }
+
+        String url = params.getUrl();
+        if (url == null || url.trim().isEmpty()) {
+            throw new RuntimeException("params.url cannot be null or empty");
+        }
+
+        Response response = post(Response.Status.CREATED, params,
+            "projects", getProjectIdOrPath(projectIdOrPath), "releases", urlEncode(tagName), "assets", "links");
+        return (response.readEntity(Link.class));
+    }
+
+    /**
+     * Updates the attributes of a given Link.
+     *
+     * <pre><code>GitLab Endpoint: PUT /projects/:id/releases/:tagName/assets/links/:linkId</code></pre>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @param linkId          the id of the Link to fetch for
+     * @param params          a ReleaseLinksParams instance holding the parameters for the Link
+     * @return a Link instance containing info on the updated Link
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Link updateLink(Object projectIdOrPath, Integer linkId, ReleaseLinkParams params) throws GitLabApiException {
+        String tagName = params.getTagName();
+        if (tagName == null || tagName.trim().isEmpty()) {
+            throw new RuntimeException("params.tagName cannot be null or empty");
+        }
+
+        if (linkId == null) {
+            throw new RuntimeException("linkId cannot be null");
+        }
+
+        Response response = put(Response.Status.OK, params,
+            "projects", getProjectIdOrPath(projectIdOrPath), "releases", urlEncode(tagName), "assets", "links", linkId);
+        return (response.readEntity(Link.class));
+    }
+
+    /**
+     * Delete a Link.
+     *
+     * <pre><code>GitLab Endpoint: DELETE /projects/:id/releases/:tagName/assets/links/:linkId</code></pre>
+     *
+     * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
+     * @param tagName         the tag name that the link was created from
+     * @param linkId          the id of the Link to delete
+     * @throws GitLabApiException if any exception occurs
+     */
+    public void deleteLink(Object projectIdOrPath, String tagName, Integer linkId) throws GitLabApiException {
+        delete(Response.Status.OK, null, "projects", getProjectIdOrPath(projectIdOrPath), "releases", urlEncode(tagName), "assets", "links", linkId);
+    }
+}

src/main/java/org/gitlab4j/api/models/Link.java

@@ -0,0 +1,72 @@
+package org.gitlab4j.api.models;
+
+import org.gitlab4j.api.utils.JacksonJson;
+
+import java.util.Date;
+import java.util.List;
+
+public class Link {
+
+    private Integer id;
+    private String name;
+    private String url;
+    /**
+     * @deprecated deprecated in GitLab 15.9, will be removed in GitLab 16.0.
+     */
+    @Deprecated
+    private Boolean external;
+    private String linkType;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    /**
+     * @deprecated deprecated in GitLab 15.9, will be removed in GitLab 16.0.
+     */
+    @Deprecated
+    public Boolean getExternal() {
+        return external;
+    }
+
+    /**
+     * @deprecated deprecated in GitLab 15.9, will be removed in GitLab 16.0.
+     */
+    @Deprecated
+    public void setExternal(Boolean external) {
+        this.external = external;
+    }
+
+    public String getLinkType() {
+        return linkType;
+    }
+
+    public void setLinkType(String linkType) {
+        this.linkType = linkType;
+    }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
+}

src/main/java/org/gitlab4j/api/models/ReleaseLinkParams.java

@@ -0,0 +1,85 @@
+package org.gitlab4j.api.models;
+
+import org.gitlab4j.api.utils.JacksonJson;
+
+import java.util.Date;
+import java.util.List;
+
+public class ReleaseLinkParams {
+
+    private String name;
+    private String tagName;
+    private String url;
+    private String filepath;
+    private String linkType;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public ReleaseLinkParams withName(String name) {
+        this.name = name;
+        return (this);
+    }
+
+    public String getTagName() {
+        return tagName;
+    }
+
+    public void setTagName(String tagName) {
+        this.tagName = tagName;
+    }
+
+    public ReleaseLinkParams withTagName(String tagName) {
+        this.tagName = tagName;
+        return (this);
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public ReleaseLinkParams withUrl(String url) {
+        this.url = url;
+        return (this);
+    }
+
+    public String getFilepath() {
+        return filepath;
+    }
+
+    public void setFilepath(String filepath) {
+        this.filepath = filepath;
+    }
+
+    public ReleaseLinkParams withFilepath(String filepath) {
+        this.filepath = filepath;
+        return (this);
+    }
+
+    public String getLinkType() {
+        return linkType;
+    }
+
+    public void setLinkType(String linkType) {
+        this.linkType = linkType;
+    }
+
+    public ReleaseLinkParams withLinkType(String linkType) {
+        this.linkType = linkType;
+        return (this);
+    }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
+}

src/test/java/org/gitlab4j/api/TestGitLabApiBeans.java

@@ -78,6 +78,7 @@
 import org.gitlab4j.api.models.Key;
 import org.gitlab4j.api.models.Label;
 import org.gitlab4j.api.models.LabelEvent;
+import org.gitlab4j.api.models.Link;
 import org.gitlab4j.api.models.Member;
 import org.gitlab4j.api.models.MergeRequest;
 import org.gitlab4j.api.models.MergeRequestDiff;
@@ -373,6 +374,12 @@ public void testLinkedIssues() throws Exception {
         assertTrue(compareJson(linkedIssues, "linked-issues.json"));
     }
 
+    @Test
+    public void testLinks() throws Exception {
+        List<Link> links = unmarshalResourceList(Link.class, "links.json");
+        assertTrue(compareJson(links, "links.json"));
+    }
+
     @Test
     public void testCommitDiscussions() throws Exception {
         List<Discussion> discussions = unmarshalResourceList(Discussion.class, "commit-discussions.json");