X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fload%2FMediaHelper.java;fp=src%2Ftim%2Fprune%2Fload%2FMediaHelper.java;h=ab4f366d820967c67674e916c15985cddc5debb2;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/load/MediaHelper.java b/src/tim/prune/load/MediaHelper.java
new file mode 100644
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--- /dev/null
+++ b/src/tim/prune/load/MediaHelper.java
@@ -0,0 +1,131 @@
+package tim.prune.load;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+import tim.prune.data.AudioClip;
+import tim.prune.data.MediaObject;
+import tim.prune.data.Photo;
+
+/**
+ * Class to provide helper functions for loading media
+ */
+public abstract class MediaHelper
+{
+	/** File filters */
+	private static GenericFileFilter _jpegFilter = null, _audioFilter = null;
+
+
+	/**
+	 * Construct a MediaObject for the given path
+	 * @param inZipFile path to archive file (if any)
+	 * @param inPath path to media file
+	 * @param inSourceFile file from which data was loaded
+	 * @return either Photo or AudioClip object as appropriate, or null
+	 */
+	public static MediaObject createMediaObject(File inZipFile, String inPath, File inSourceFile)
+	{
+		if (inPath == null || inPath.length() < 5) return null;
+		InputStream is = null;
+		ZipFile zf     = null;
+		byte[] data    = null;
+		String url     = null;
+		try
+		{
+			// Check if path is a URL, in which case get an input stream from it
+			if (inPath.substring(0, 5).toLowerCase().equals("http:"))
+			{
+				url = inPath;
+				is = new URL(inPath).openStream();
+				data = ByteScooper.scoop(is);
+			}
+		}
+		catch (IOException ioe) {
+			System.err.println("Got ioe from url: " + ioe.getMessage());
+		} // is stays null
+
+		// Now see if file is in the zip file
+		if (is == null && inZipFile != null && inZipFile.exists() && inZipFile.canRead())
+		{
+			try
+			{
+				zf = new ZipFile(inZipFile);
+				ZipEntry entry = zf.getEntry(inPath);
+				if (entry != null && entry.getSize() > 0)
+				{
+					data = ByteScooper.scoop(zf.getInputStream(entry));
+					// System.out.println("Size of data " + (data.length == entry.getSize()?"matches":"DOESN'T match"));
+				}
+			}
+			catch (IOException ioe) {
+				System.err.println("Got ioe from zip file: " + ioe.getMessage());
+			}
+		}
+		// Clean up input streams
+		if (is != null) try {
+			is.close();
+		} catch (IOException ioe) {}
+		if (zf != null) try {
+			zf.close();
+		} catch (IOException ioe) {}
+
+		if (data != null)
+		{
+			// Create Photo or AudioClip using this entry
+			String filename = new File(inPath).getName();
+			initFilters();
+			if (_jpegFilter.acceptFilename(inPath)) {
+				return new Photo(data, filename, url);
+			}
+			else if (_audioFilter.acceptFilename(inPath)) {
+				return new AudioClip(data, filename, url);
+			}
+			return null;
+		}
+
+		// If we haven't got a result by now, try to load plain file
+		File file = new File(inPath);
+		if (inSourceFile != null && !file.isAbsolute()) {
+			file = new File(inSourceFile.getParent(), inPath);
+		}
+		// awkward construction because new File(startPath, absolutePath) doesn't work
+		return createMediaObject(file);
+	}
+
+	/**
+	 * Construct a MediaObject for the given file
+	 * @param inFile file to load
+	 * @return either Photo or AudioClip object as appropriate, or null
+	 */
+	private static MediaObject createMediaObject(File inFile)
+	{
+		if (inFile == null) {return null;}
+		if (!inFile.exists() || !inFile.canRead() || !inFile.isFile()) {return null;}
+		initFilters();
+		// Check if filename looks like a jpeg
+		if (_jpegFilter.acceptFilename(inFile.getName())) {
+			return JpegLoader.createPhoto(inFile);
+		}
+		// Check if filename looks like an audio clip
+		if (_audioFilter.acceptFilename(inFile.getName())) {
+			return new AudioClip(inFile);
+		}
+		// Neither photo nor audio
+		return null;
+	}
+
+	/**
+	 * Initialise filters if necessary
+	 */
+	private static void initFilters()
+	{
+		if (_jpegFilter == null) {
+			_jpegFilter = new JpegFileFilter();
+			_audioFilter = new AudioFileFilter();
+		}
+	}
+}