Added support for Issue Boards API (#316).

Author: gmessner

README.md

@@ -11,7 +11,7 @@ To utilize the GitLab API for Java in your project, simply add the following dep
 ```java
 dependencies {
     ...
-    compile group: 'org.gitlab4j', name: 'gitlab4j-api', version: '4.9.20'
+    compile group: 'org.gitlab4j', name: 'gitlab4j-api', version: '4.9.21'
 }
 ```
 
@@ -22,7 +22,7 @@ dependencies {
 <dependency>
     <groupId>org.gitlab4j</groupId>
     <artifactId>gitlab4j-api</artifactId>
-    <version>4.9.20</version>
+    <version>4.9.21</version>
 </dependency>
 ```
 
@@ -206,6 +206,7 @@ The API has been broken up into sub API classes to make it easier to learn and t
 ### Available Sub APIs
 ------------------
 &nbsp;&nbsp;[AwardEmojiApi](#awardemojiapi)<br/>
+&nbsp;&nbsp;[BoardsApi](#boardsapi)<br/>
 &nbsp;&nbsp;[CommitsApi](#commitsapi)<br/>
 &nbsp;&nbsp;[DeployKeysApi](#deploykeysapi)<br/>
 &nbsp;&nbsp;[DiscussionsApi](#discussionsapi)<br/>
@@ -244,6 +245,12 @@ The API has been broken up into sub API classes to make it easier to learn and t
 List<AwardEmoji> awardEmojis = gitLabApi.getAwardEmojiApi().getIssuAwardEmojis(1, 1);
 ```
 
+#### BoardsApi
+```java
+// Get a list of the Issue Boards belonging to the specified project
+List<Board> boards = gitLabApi.getBoardsApi().getBoards(projectId);
+```
+
 #### CommitsApi
 ```java
 // Get a list of commits associated with the specified branch that fall within the specified time window

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

@@ -50,6 +50,7 @@ public String getApiNamespace() {
     private Session session;
 
     private AwardEmojiApi awardEmojiApi;
+    private BoardsApi boardsApi;
     private CommitsApi commitsApi;
     private DiscussionsApi discussionsApi;
     private DeployKeysApi deployKeysApi;
@@ -826,6 +827,25 @@ public AwardEmojiApi getAwardEmojiApi() {
         return (awardEmojiApi);
     }
 
+    /**
+     * Gets the BoardsApi instance owned by this GitLabApi instance. The BoardsApi is used
+     * to perform all Issue Boards related API calls.
+     *
+     * @return the BoardsApi instance owned by this GitLabApi instance
+     */
+    public BoardsApi getBoardsApi() {
+
+        if (boardsApi == null) {
+            synchronized (this) {
+                if (boardsApi == null) {
+                    boardsApi = new BoardsApi(this);
+                }
+            }
+        }
+
+        return (boardsApi);
+    }
+
     /**
      * Gets the CommitsApi instance owned by this GitLabApi instance. The CommitsApi is used
      * to perform all commit related API calls.

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

@@ -1,6 +1,7 @@
 package org.gitlab4j.api;
 
 import java.util.List;
+import java.util.stream.Stream;
 
 import javax.ws.rs.core.GenericType;
 import javax.ws.rs.core.Response;
@@ -52,6 +53,17 @@ public Pager<Label> getLabels(Object projectIdOrPath, int itemsPerPage) throws G
                 "projects", getProjectIdOrPath(projectIdOrPath), "labels"));
     }
 
+    /**
+     * Get a Stream of all labels of the specified project.
+     *
+     * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
+     * @return a Stream of project's labels
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Stream<Label> getLabelsStream(Object projectIdOrPath) throws GitLabApiException {
+        return (getLabels(projectIdOrPath, getDefaultPerPage()).stream());
+    }
+
     /**
      * Create a label
      *

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

@@ -17,7 +17,7 @@ public class Label {
     private Integer openIssuesCount;
     private Integer closedIssuesCount;
     private Integer openMergeRequestsCount;
-    private boolean subscribed;
+    private Boolean subscribed;
     private Integer priority;
 
     public Integer getId() {
@@ -76,11 +76,11 @@ public void setOpenMergeRequestsCount(Integer openMergeRequestsCount) {
         this.openMergeRequestsCount = openMergeRequestsCount;
     }
 
-    public boolean isSubscribed() {
+    public Boolean isSubscribed() {
         return subscribed;
     }
 
-    public void setSubscribed(boolean subscribed) {
+    public void setSubscribed(Boolean subscribed) {
         this.subscribed = subscribed;
     }
 

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

@@ -34,6 +34,7 @@
 
 import org.gitlab4j.api.models.ArtifactsFile;
 import org.gitlab4j.api.models.AwardEmoji;
+import org.gitlab4j.api.models.Board;
 import org.gitlab4j.api.models.Branch;
 import org.gitlab4j.api.models.Comment;
 import org.gitlab4j.api.models.Commit;
@@ -94,6 +95,12 @@ public void testAwardEmoji() throws Exception {
         assertTrue(compareJson(awardEmoji, "award-emoji.json"));
     }
 
+    @Test
+    public void testBoard() throws Exception {
+        List<Board> boards = unmarshalResourceList(Board.class, "project-board.json");
+        assertTrue(compareJson(boards, "project-board.json"));
+    }
+
     @Test
     public void testBranch() throws Exception {