JSON Parser for custom CSF Format

This JSON Parser will read a CSF File, parse it and turn it into a Song, SongInstances and ObjectInstances.

audio/io/JSONReader.java

@@ -0,0 +1,117 @@
+package audio.io;
+
+import java.awt.Color;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.Field;
+
+import javax.json.Json;
+import javax.json.JsonArray;
+import javax.json.JsonObject;
+import javax.json.JsonReader;
+
+import audio.ObjectInstance;
+import audio.Song;
+import audio.SongInstance;
+
+public class JSONReader {
+
+	public static Song readSong(File f) throws IOException {
+
+		if(!f.exists())
+			throw new FileNotFoundException("CSF File does not exist");
+		
+		// Get CSF File
+		InputStream is = new FileInputStream(f);
+
+		// Read CSF Content
+		JsonReader rdr = Json.createReader(is);
+		JsonObject obj = rdr.readObject();
+		rdr.close();
+		
+		if(!obj.containsKey("meta") || !obj.containsKey("file") || !obj.containsKey("data"))
+			throw new IOException("Corrupt CSF File");
+
+		// Create new Song
+		Song s = new Song();
+
+		// Read META data
+		JsonObject meta = obj.getJsonObject("meta");
+
+		s.setTitle(meta.getString("title"));
+		s.setSubtitle(meta.getString("subtitle"));
+		s.setAuthor(meta.getString("author"));
+		s.setCreator(meta.getString("creator"));
+		s.setBPM(meta.getInt("BPM"));
+		
+		//Read FILE data
+		JsonObject file = obj.getJsonObject("file");
+		
+		File audio = new File(file.getString("audio"));
+		if(!audio.exists() || !audio.getName().endsWith(".mp3"))
+			throw new FileNotFoundException("Audio file does not exist");
+		s.setAudio(audio);
+		
+		File background = new File(file.getString("background"));
+		if(!background.exists() || !(background.getName().endsWith(".jpg") || background.getName().endsWith(".png")))
+			throw new FileNotFoundException("Background image does not exist");
+		s.setBackground(background);
+
+		File banner = new File(file.getString("banner"));
+		if(!banner.exists() || !(banner.getName().endsWith(".jpg") || banner.getName().endsWith(".png")))
+			throw new FileNotFoundException("Banner image does not exist");
+		s.setBanner(banner);
+		
+		s.setFile(f);
+		
+		//Read Data data
+		JsonArray data = obj.getJsonArray("data");
+		for(int i = 0; i < data.size(); i++)
+		{
+			s.addSongInstance( readSongInstance(data.getJsonObject(i)) );
+		}
+		
+		return s;
+	}
+
+	private static SongInstance readSongInstance(JsonObject obj) throws IOException {
+		String difficulty = obj.getString("difficulty");
+		SongInstance si = new SongInstance(difficulty);
+		
+		JsonArray object = obj.getJsonArray("objects");
+		for(int i = 0; i < object.size(); i++)
+		{
+			si.addObjectInstance( readObjectInstance(object.getJsonObject(i)) );
+		}
+		
+		return si;
+	}
+	
+	private static ObjectInstance readObjectInstance(JsonObject obj) throws IOException
+	{
+		ObjectInstance oi = new ObjectInstance();
+		
+		oi.setTime(obj.getInt("time"));
+		oi.setDirection(obj.getInt("direction"));
+		
+		Color color;
+		try {
+		    Field field = Color.class.getField(obj.getString("color").toLowerCase());
+		    color = (Color)field.get(null);
+		} catch (Exception e) {
+		    throw new IOException("Cannot read property color from " + obj);
+		}
+		oi.setColor(color);
+		
+		if(obj.containsKey("hold") && obj.getBoolean("hold"))
+		{
+			oi.setHold(obj.getBoolean("hold"));
+			oi.setLength(obj.getInt("length"));
+		}
+		
+		return oi;
+	}
+}