Support passing customData to media load request

src/main/java/su/litvak/chromecast/api/v2/Channel.java

@@ -490,7 +490,7 @@ private void startSession(String destinationId) throws IOException {
         }
     }
 
-    public MediaStatus load(String destinationId, String sessionId, Media media, boolean autoplay, double currentTime, Map<String, String> customData) throws IOException {
+    public MediaStatus load(String destinationId, String sessionId, Media media, boolean autoplay, double currentTime, Object customData) throws IOException {
         startSession(destinationId);
         StandardResponse.MediaStatus status = sendStandard("urn:x-cast:com.google.cast.media", StandardRequest.load(sessionId, media, autoplay, currentTime, customData), destinationId);
         return status == null || status.statuses.length == 0 ? null : status.statuses[0];

src/main/java/su/litvak/chromecast/api/v2/ChromeCast.java

@@ -432,15 +432,10 @@ public final MediaStatus load(String url) throws IOException {
      * @throws IOException
      */
     public final MediaStatus load(String mediaTitle, String thumb, String url, String contentType) throws IOException {
-        Status status = getStatus();
-        Application runningApp = status.getRunningApp();
-        if (runningApp == null) {
-            throw new ChromeCastException("No application is running in ChromeCast");
-        }
         Map<String, Object> metadata = new HashMap<String, Object>(2);
         metadata.put("title", mediaTitle);
         metadata.put("thumb", thumb);
-        return channel().load(getTransportId(runningApp), runningApp.sessionId, new Media(url,
+        return load(new Media(url,
                 contentType == null ? getContentType(url) : contentType, null, null, null,
                 metadata, null, null), true, 0d, null);
     }
@@ -457,6 +452,25 @@ public final MediaStatus load(String mediaTitle, String thumb, String url, Strin
      * @throws IOException
      */
     public final MediaStatus load(final Media media) throws IOException {
+        return load(media, true, 0d, null);
+    }
+
+    /**
+     * <p>Loads and starts playing specified media</p>
+     *
+     * <p>If no application is running at the moment then exception is thrown.</p>
+     *
+     * @param media The media to load and play.
+     *              See <a href="https://developers.google.com/cast/docs/reference/messages#Load">
+     *                  https://developers.google.com/cast/docs/reference/messages#Load</a> for more details.
+     * @param autoplay whether the media should start playing when loaded
+     * @param currentTime seconds since beginning of content
+     * @param customData Application-specific data
+     * @return The new media status that resulted from loading the media.
+     * @throws IOException
+     */
+    public final MediaStatus load(final Media media, boolean autoplay, double currentTime,
+            Object customData) throws IOException {
         Status status = getStatus();
         Application runningApp = status.getRunningApp();
         if (runningApp == null) {
@@ -469,7 +483,8 @@ public final MediaStatus load(final Media media) throws IOException {
         } else {
             mediaToPlay = media;
         }
-        return channel().load(getTransportId(runningApp), runningApp.sessionId, mediaToPlay, true, 0d, null);
+        return channel().load(getTransportId(runningApp), runningApp.sessionId, mediaToPlay, autoplay, currentTime,
+                customData);
     }
 
     /**

src/main/java/su/litvak/chromecast/api/v2/StandardRequest.java

@@ -17,8 +17,6 @@
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 
-import java.util.Map;
-
 /**
  * Parent class for transport object representing messages sent TO ChromeCast device.
  */
@@ -91,17 +89,12 @@ static class Load extends StandardRequest {
         @JsonProperty
         final Object customData;
 
-        Load(String sessionId, Media media, boolean autoplay, double currentTime,
-             final Map<String, String> customData) {
+        Load(String sessionId, Media media, boolean autoplay, double currentTime, Object customData) {
             this.sessionId = sessionId;
             this.media = media;
             this.autoplay = autoplay;
             this.currentTime = currentTime;
-
-            this.customData = customData == null ? null : new Object() {
-                @JsonProperty
-                Map<String, String> payload = customData;
-            };
+            this.customData = customData;
         }
     }
 
@@ -180,7 +173,7 @@ static Stop stop(String sessionId) {
     }
 
     static Load load(String sessionId, Media media, boolean autoplay, double currentTime,
-                     Map<String, String> customData) {
+                     Object customData) {
         return new Load(sessionId, media, autoplay, currentTime, customData);
     }