Version 12, December 2010

[GpsPrune.git] / tim / prune / load / MediaHelper.java

diff --git a/tim/prune/load/MediaHelper.java b/tim/prune/load/MediaHelper.java
new file mode 100644 (file)
index 0000000..9b029d7
--- /dev/null
+++ b/tim/prune/load/MediaHelper.java
@@ -0,0 +1,70 @@
+package tim.prune.load;
+
+import java.io.File;
+
+import tim.prune.data.AudioFile;
+import tim.prune.data.MediaFile;
+import tim.prune.data.MediaList;
+import tim.prune.data.Photo;
+import tim.prune.data.Track;
+
+/**
+ * Class to provide helper functions for loading media
+ */
+public abstract class MediaHelper
+{
+       /** File filters */
+       private static GenericFileFilter _jpegFilter = null, _audioFilter = null;
+
+       /**
+        * Construct a MediaFile object for the given path
+        * @param inPath path to file
+        * @return either Photo or AudioFile object as appropriate, or null
+        */
+       public static MediaFile createMediaFile(String inPath)
+       {
+               if (inPath == null) {return null;}
+               File file = new File(inPath);
+               if (!file.exists() || !file.canRead() || !file.isFile()) {return null;}
+               // Initialise filters if necessary
+               if (_jpegFilter == null) {
+                       _jpegFilter = new JpegFileFilter();
+                       _audioFilter = new AudioFileFilter();
+               }
+               // Check if filename looks like a jpeg
+               if (_jpegFilter.acceptFilename(file.getName())) {
+                       return JpegLoader.createPhoto(file);
+               }
+               // Check if filename looks like an audio file
+               if (_audioFilter.acceptFilename(file.getName())) {
+                       return new AudioFile(file);
+               }
+               // Neither photo nor audio
+               return null;
+       }
+
+       /**
+        * Add all the media from the given track into the specified list
+        * @param inTrack track from which media to take
+        * @param inMediaList list to which media should be added
+        * @param inMediaClass class of media, either Photo or AudioFile
+        */
+       public static void addMediaFromTrack(Track inTrack, MediaList inMediaList,
+               Class<?> inMediaClass)
+       {
+               final int numPoints = inTrack.getNumPoints();
+               for (int i=0; i<numPoints; i++)
+               {
+                       MediaFile media = null;
+                       if (inMediaClass == Photo.class) {
+                               media = inTrack.getPoint(i).getPhoto();
+                       }
+                       else if (inMediaClass == AudioFile.class) {
+                               media = inTrack.getPoint(i).getAudio();
+                       }
+                       if (media != null) {
+                               inMediaList.addMedia(media);
+                       }
+               }
+       }
+}