Wrote a wrapper around the id3 tag program.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@618 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/robodj/src/java/robodj/convert/ID3Tagger.java

@@ -0,0 +1,77 @@
+//
+// $Id: ID3Tagger.java,v 1.1 2002/03/03 05:25:09 mdb Exp $
+
+package robodj.convert;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.apache.commons.util.StreamUtils;
+
+/**
+ * A tagger implementation that uses 'id3' to do it's job.
+ */
+public class ID3Tagger
+{
+    // documentation inherited
+    public void idTrack (String target, String artist, String album,
+                         String title, int trackNo)
+	throws ConvertException
+    {
+        String[] cmdarray = new String[] {
+            "id3", "-t", title, "-a", artist, "-A", album,
+            "-T", Integer.toString(trackNo), target };
+
+        try {
+            Runtime rt = Runtime.getRuntime();
+            Process ripproc = rt.exec(cmdarray);
+
+	    InputStream in = ripproc.getErrorStream();
+            String output = StreamUtils.streamAsString(in);
+
+            // check the return value of the process
+            try {
+                int retval = ripproc.waitFor();
+                if (retval != 0) {
+                    // ship off the error output from id3
+                    throw new ConvertException(
+                        "id3 failed: " + output);
+                }
+
+            } catch (InterruptedException ie) {
+                // why we were interrupted I can only speculate, but we'll
+                // go ahead and freak out anyway
+                throw new ConvertException("Interrupted while waiting for " +
+                                           "encoder process to exit.");
+            }
+
+	} catch (IOException ioe) {
+	    throw new ConvertException(
+		"Error communicating with encoder:\n" + ioe);
+	}
+    }
+
+    public static void main (String[] args)
+    {
+        ID3Tagger tagger = new ID3Tagger();
+        if (args.length < 5) {
+            System.err.println("Usage: ID3Tagger target artist album " +
+                               "title trackNo");
+            System.exit(-1);
+        }
+
+        int trackNo = 0;
+        try {
+            trackNo = Integer.parseInt(args[4]);
+        } catch (NumberFormatException nfe) {
+            System.err.println("Invalid track number: " + args[4]);
+            System.exit(-1);
+        }
+
+        try {
+            tagger.idTrack(args[0], args[1], args[2], args[3], trackNo);
+        } catch (ConvertException ce) {
+            ce.printStackTrace(System.err);
+        }
+    }
+}

projects/robodj/src/java/robodj/convert/Tagger.java

@@ -0,0 +1,19 @@
+//
+// $Id: Tagger.java,v 1.1 2002/03/03 05:25:10 mdb Exp $
+
+package robodj.convert;
+
+/**
+ * The tagger interface is used to set the ID3 tags in MP3 files.
+ */
+public interface Tagger
+{
+    /**
+     * Sets the ID3 tags for the specified target MP3 file for the
+     * supplied information: artist, album name, track title and track
+     * number.
+     */
+    public void idTrack (String target, String artist, String album,
+                         String title, int trackNo)
+	throws ConvertException;
+}