implemented creating subtasks

README.md

@@ -17,6 +17,8 @@ jira-client is still under heavily development. Here's what works:
 * Add comments to issues
 * Vote on issues
 * Add and remove issue watchers
+* Add and remove issue links
+* Create sub-tasks
 
 ## Contributing ##
 
@@ -141,6 +143,14 @@ public class Example {
                 .field(Field.ASSIGNEE, "robin")
                 .execute();
             System.out.println(newIssue);
+
+            /* Link to the old issue */
+            newIssue.link("TEST-123", "Dependency");
+
+            /* Create sub-task */
+            Issue subtask = newIssue.createSubtask()
+                .field(Field.SUMMARY, "replace lightbulb")
+                .execute();
         } catch (JiraException ex) {
             System.err.println(ex.getMessage());
 

src/main/java/net/rcarz/jiraclient/Field.java

@@ -471,7 +471,7 @@ public final class Field {
             json.put("name", value.toString());
 
             return json.toString();
-        } else if (m.type.equals("project")) {
+        } else if (m.type.equals("project") || m.type.equals("issuelink")) {
             JSONObject json = new JSONObject();
             json.put("key", value.toString());
 

src/main/java/net/rcarz/jiraclient/Issue.java

@@ -552,6 +552,19 @@ public final class Issue extends Resource {
             .field(Field.ISSUE_TYPE, issueType);
     }
 
+    /**
+     * Creates a new sub-task.
+     *
+     * @return a fluent create instance
+     *
+     * @throws JiraException when the client fails to retrieve issue metadata
+     */
+    public FluentCreate createSubtask() throws JiraException {
+
+        return Issue.create(restclient, getProject().getKey(), "Sub-task")
+            .field("parent", getKey());
+    }
+
     private static JSONObject realGet(RestClient restclient, String key)
         throws JiraException {