Added support for listing LDAP group links

Author: Jan Henrik Wiesner

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

@@ -22,6 +22,7 @@
 import org.gitlab4j.api.models.GroupFilter;
 import org.gitlab4j.api.models.GroupParams;
 import org.gitlab4j.api.models.GroupProjectsFilter;
+import org.gitlab4j.api.models.LdapGroupLink;
 import org.gitlab4j.api.models.Member;
 import org.gitlab4j.api.models.Project;
 import org.gitlab4j.api.models.Variable;
@@ -1177,6 +1178,20 @@ public void ldapSync(Object groupIdOrPath) throws GitLabApiException {
         post(Response.Status.NO_CONTENT, (Form)null, "groups", getGroupIdOrPath(groupIdOrPath), "ldap_sync");
     }
 
+    /**
+     * Get the list of LDAP group links.
+     * 
+     * <pre><code>GitLab Endpoint: GET /groups/:id/ldap_group_links</code></pre>
+     * 
+     * @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path
+     * @return a list of LDAP group links
+     * @throws GitLabApiException if any exception occurs
+     */
+    public List<LdapGroupLink> getLdapGroupLinks(Object groupIdOrPath) throws GitLabApiException {
+         Response response = get(Response.Status.OK, null, "groups", getGroupIdOrPath(groupIdOrPath), "ldap_group_links");
+         return (response.readEntity(new GenericType<List<LdapGroupLink>>() {}));
+    }
+
     /**
      * Adds an LDAP group link.
      *

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

@@ -0,0 +1,57 @@
+
+package org.gitlab4j.api.models;
+
+import org.gitlab4j.api.utils.JacksonJson;
+
+public class LdapGroupLink {
+
+    // The GitLab REST API documentation (https://docs.gitlab.com/ee/api/groups.html#list-ldap-group-links)
+    // does not specify the attributes which are returned for a LDAP group link :-/.
+    // This are the attributes returned by our GitLab instance (15.10.2-ee).
+    // These seem fine because they match with the attributes which you can pass when adding a LDAP group link :-).
+
+    private String cn;
+
+    private AccessLevel groupAccess;
+
+    private String provider;
+
+    private String filter;
+
+    public String getCn() {
+        return cn;
+    }
+
+    public void setCn(String aCn) {
+        cn = aCn;
+    }
+
+    public AccessLevel getGroupAccess() {
+       return groupAccess;
+    }
+
+    public void setGroupAccess(AccessLevel aGroupAccess) {
+        groupAccess = aGroupAccess;
+    }
+
+    public String getProvider() {
+        return provider;
+     }
+
+    public void setProvider(String aProvider) {
+        provider = aProvider;
+    }
+
+    public String getFilter() {
+        return filter;
+    }
+
+    public void setFilter(String aFilter) {
+        filter = aFilter;
+    }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
+}