Complete bulk of FrameProducer refactor

pom.xml

@@ -24,6 +24,7 @@
                 <configuration>
                     <source>15</source>
                     <target>15</target>
+                    <compilerArgs>--enable-preview</compilerArgs>
                 </configuration>
             </plugin>
         </plugins>

src/main/java/sh/ball/FrameSet.java

@@ -0,0 +1,5 @@
+package sh.ball;
+
+public interface FrameSet<T> {
+  T next();
+}

src/main/java/sh/ball/audio/FrameProducer.java

@@ -1,59 +1,35 @@
 package sh.ball.audio;
 
-import sh.ball.Renderer;
-import sh.ball.engine.Vector3;
-import java.io.IOException;
-import java.util.List;
-import javax.xml.parsers.ParserConfigurationException;
 import org.xml.sax.SAXException;
+import sh.ball.FrameSet;
+import sh.ball.Renderer;
+
+import java.io.IOException;
 import sh.ball.parser.FileParser;
-import sh.ball.parser.ObjParser;
-import sh.ball.parser.TextParser;
-import sh.ball.parser.svg.SvgParser;
-import sh.ball.shapes.Shape;
 
-public class FrameProducer implements Runnable {
+import javax.xml.parsers.ParserConfigurationException;
 
-  private final Renderer<List<Shape>> renderer;
+public class FrameProducer<T> implements Runnable {
 
-  private ObjParser objParser;
-  private SvgParser svgParser;
-  private TextParser textParser;
-  private FileParser parser;
+  private final Renderer<T> renderer;
+  private final FrameSet<T> frames;
 
-  public FrameProducer(Renderer<List<Shape>> renderer) {
+  private boolean running;
+
+  public FrameProducer(Renderer<T> renderer, FileParser<FrameSet<T>> parser) throws IOException, SAXException, ParserConfigurationException {
     this.renderer = renderer;
+    this.frames = parser.parse();
   }
 
   @Override
   public void run() {
-    while (true) {
-      renderer.addFrame(parser.nextFrame());
+    running = true;
+    while (running) {
+      renderer.addFrame(frames.next());
     }
   }
 
-  public void setParser(String filePath)
-      throws IOException, ParserConfigurationException, SAXException {
-    if (ObjParser.isObjFile(filePath)) {
-      objParser = new ObjParser(filePath, 1);
-      parser = objParser;
-    } else if (SvgParser.isSvgFile(filePath)) {
-      svgParser = new SvgParser(filePath);
-      parser = svgParser;
-    } else if (TextParser.isTxtFile(filePath)) {
-      textParser = new TextParser(filePath);
-      parser = textParser;
-    } else {
-      throw new IllegalArgumentException(
-          "Provided file extension in file " + filePath + " not supported.");
-    }
-  }
-
-  public void setFocalLength(Double focalLength) {
-    objParser.setFocalLength(focalLength);
-  }
-
-  public void setCameraPos(Vector3 vector) {
-    objParser.setCameraPos(vector);
+  public void stop() {
+    running = false;
   }
 }

src/main/java/sh/ball/gui/Controller.java

@@ -3,13 +3,17 @@ package sh.ball.gui;
 import sh.ball.MovableRenderer;
 import sh.ball.audio.AudioPlayer;
 import sh.ball.audio.FrameProducer;
-import sh.ball.engine.Vector3;
+
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.net.URL;
 import java.util.List;
 import java.util.Map;
 import java.util.ResourceBundle;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
 import javafx.beans.InvalidationListener;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
@@ -20,20 +24,28 @@ import javafx.scene.control.TextField;
 import javafx.scene.control.TitledPane;
 import javafx.stage.FileChooser;
 import javafx.stage.Stage;
+
 import javax.xml.parsers.ParserConfigurationException;
+
 import org.xml.sax.SAXException;
-import sh.ball.parser.ObjParser;
+import sh.ball.parser.obj.ObjParser;
+import sh.ball.parser.ParserFactory;
+import sh.ball.parser.txt.TextParser;
 import sh.ball.shapes.Shape;
 import sh.ball.shapes.Vector2;
 
 public class Controller implements Initializable {
 
-  private static final String DEFAULT_FILE = "src/main/resources/models/cube.obj";
+  private static final String DEFAULT_FILE = TextParser.class.getResource("/models/cube.obj").getPath();
 
   private final FileChooser fileChooser = new FileChooser();
-
   private final MovableRenderer<List<Shape>, Vector2> renderer = new AudioPlayer();
-  private final FrameProducer producer = new FrameProducer(renderer);
+  private final ExecutorService executor = Executors.newSingleThreadExecutor();
+
+  private FrameProducer<List<Shape>> producer = new FrameProducer<>(
+    renderer,
+    ParserFactory.getParser(DEFAULT_FILE).orElseThrow(FileNotFoundException::new)
+  );
 
   private Stage stage;
 
@@ -74,52 +86,53 @@ public class Controller implements Initializable {
   @FXML
   private TextField cameraZTextField;
 
+  public Controller() throws ParserConfigurationException, SAXException, IOException {
+  }
+
   private Map<Slider, SliderUpdater<Double>> initializeSliderMap() {
     return Map.of(
-        weightSlider,
-        new SliderUpdater<>(weightLabel::setText, renderer::setQuality),
-        rotateSpeedSlider,
-        new SliderUpdater<>(rotateSpeedLabel::setText, renderer::setRotationSpeed),
-        translationSpeedSlider,
-        new SliderUpdater<>(translationSpeedLabel::setText, renderer::setTranslationSpeed),
-        scaleSlider,
-        new SliderUpdater<>(scaleLabel::setText, renderer::setScale),
-        focalLengthSlider,
-        new SliderUpdater<>(focalLengthLabel::setText, producer::setFocalLength)
+      weightSlider,
+      new SliderUpdater<>(weightLabel::setText, renderer::setQuality),
+      rotateSpeedSlider,
+      new SliderUpdater<>(rotateSpeedLabel::setText, renderer::setRotationSpeed),
+      translationSpeedSlider,
+      new SliderUpdater<>(translationSpeedLabel::setText, renderer::setTranslationSpeed),
+      scaleSlider,
+      new SliderUpdater<>(scaleLabel::setText, renderer::setScale)
+//      focalLengthSlider,
+//      new SliderUpdater<>(focalLengthLabel::setText, producer::setFocalLength)
     );
   }
 
   @Override
   public void initialize(URL url, ResourceBundle resourceBundle) {
-    chooseFile(new File(DEFAULT_FILE));
-
     Map<Slider, SliderUpdater<Double>> sliders = initializeSliderMap();
 
     for (Slider slider : sliders.keySet()) {
       slider.valueProperty().addListener((source, oldValue, newValue) ->
-          sliders.get(slider).update(slider.getValue())
+        sliders.get(slider).update(slider.getValue())
       );
     }
 
     InvalidationListener translationUpdate = observable ->
-        renderer.setTranslation(new Vector2(
-            tryParse(translationXTextField.getText()),
-            tryParse(translationYTextField.getText())
-        ));
+      renderer.setTranslation(new Vector2(
+        tryParse(translationXTextField.getText()),
+        tryParse(translationYTextField.getText())
+      ));
 
     translationXTextField.textProperty().addListener(translationUpdate);
     translationYTextField.textProperty().addListener(translationUpdate);
 
-    InvalidationListener cameraPosUpdate = observable ->
-        producer.setCameraPos(new Vector3(
-            tryParse(cameraXTextField.getText()),
-            tryParse(cameraYTextField.getText()),
-            tryParse(cameraZTextField.getText())
-        ));
-
-    cameraXTextField.textProperty().addListener(cameraPosUpdate);
-    cameraYTextField.textProperty().addListener(cameraPosUpdate);
-    cameraZTextField.textProperty().addListener(cameraPosUpdate);
+//    InvalidationListener cameraPosUpdate = observable ->
+//      producer.setCameraPos(new Vector3(
+//        tryParse(cameraXTextField.getText()),
+//        tryParse(cameraYTextField.getText()),
+//        tryParse(cameraZTextField.getText())
+//      ));
+//
+//    cameraXTextField.textProperty().addListener(cameraPosUpdate);
+//    cameraYTextField.textProperty().addListener(cameraPosUpdate);
+//    cameraZTextField.textProperty().addListener(cameraPosUpdate);
 
     chooseFileButton.setOnAction(e -> {
       File file = null;
@@ -129,7 +142,7 @@ public class Controller implements Initializable {
       chooseFile(file);
     });
 
-    new Thread(producer).start();
+    executor.submit(producer);
     new Thread(renderer).start();
   }
 
@@ -143,8 +156,15 @@ public class Controller implements Initializable {
 
   private void chooseFile(File file) {
     try {
+      producer.stop();
       String path = file.getAbsolutePath();
-      producer.setParser(path);
+      producer = new FrameProducer<>(
+        renderer,
+        ParserFactory.getParser(path)
+          .orElseThrow(FileNotFoundException::new)
+      );
+      executor.submit(producer);
+
       if (file.exists() && !file.isDirectory()) {
         fileLabel.setText(path);
         objTitledPane.setDisable(!ObjParser.isObjFile(path));

src/main/java/sh/ball/parser/FileParser.java

@@ -6,7 +6,7 @@ import javax.xml.parsers.ParserConfigurationException;
 import org.xml.sax.SAXException;
 import sh.ball.shapes.Shape;
 
-public abstract class FileParser {
+public abstract class FileParser<T> {
 
   public abstract String getFileExtension();
 
@@ -21,9 +21,8 @@ public abstract class FileParser {
     return path.matches(".*\\." + getFileExtension());
   }
 
-  protected abstract void parseFile(String path)
+  public abstract T parse()
       throws ParserConfigurationException, IOException, SAXException, IllegalArgumentException;
 
-  public abstract List<Shape> nextFrame();
   public abstract String getFilePath();
 }

src/main/java/sh/ball/parser/ParserFactory.java

@@ -0,0 +1,28 @@
+package sh.ball.parser;
+
+import org.xml.sax.SAXException;
+import sh.ball.FrameSet;
+import sh.ball.parser.obj.ObjParser;
+import sh.ball.parser.svg.SvgParser;
+import sh.ball.parser.txt.TextParser;
+import sh.ball.shapes.Shape;
+
+import javax.xml.parsers.ParserConfigurationException;
+import java.io.IOException;
+import java.util.List;
+import java.util.Optional;
+
+public class ParserFactory {
+
+  public static Optional<FileParser<FrameSet<List<Shape>>>> getParser(String filePath) throws IOException, ParserConfigurationException, SAXException {
+    if (ObjParser.isObjFile(filePath)) {
+      return Optional.of(new ObjParser(filePath, 1));
+    } else if (SvgParser.isSvgFile(filePath)) {
+      return Optional.of(new SvgParser(filePath));
+    } else if (TextParser.isTxtFile(filePath)) {
+      return Optional.of(new TextParser(filePath));
+    }
+    return Optional.empty();
+  }
+
+}

src/main/java/sh/ball/parser/ShapeFrameSet.java

@@ -0,0 +1,20 @@
+package sh.ball.parser;
+
+import sh.ball.FrameSet;
+import sh.ball.shapes.Shape;
+
+import java.util.List;
+
+public class ShapeFrameSet implements FrameSet<List<Shape>> {
+
+  private final List<Shape> shapes;
+
+  public ShapeFrameSet(List<Shape> shapes) {
+    this.shapes = shapes;
+  }
+
+  @Override
+  public List<Shape> next() {
+    return shapes;
+  }
+}

src/main/java/sh/ball/parser/obj/ObjFrameSet.java

@@ -0,0 +1,28 @@
+package sh.ball.parser.obj;
+
+import sh.ball.FrameSet;
+import sh.ball.engine.Camera;
+import sh.ball.engine.Vector3;
+import sh.ball.engine.WorldObject;
+import sh.ball.shapes.Shape;
+
+import java.util.List;
+
+public class ObjFrameSet implements FrameSet<List<Shape>> {
+
+  private final WorldObject object;
+  private final Camera camera;
+  private final Vector3 rotation;
+
+  public ObjFrameSet(WorldObject object, Camera camera, Vector3 rotation) {
+    this.object = object;
+    this.camera = camera;
+    this.rotation = rotation;
+  }
+
+  @Override
+  public List<Shape> next() {
+    object.rotate(rotation);
+    return camera.draw(object);
+  }
+}

src/main/java/sh/ball/parser/obj/ObjParser.java

@@ -1,35 +1,35 @@
-package sh.ball.parser;
+package sh.ball.parser.obj;
 
+import sh.ball.FrameSet;
 import sh.ball.engine.Camera;
 import sh.ball.engine.Vector3;
 import sh.ball.engine.WorldObject;
 import java.io.IOException;
 import java.util.List;
+
+import sh.ball.parser.FileParser;
 import sh.ball.shapes.Shape;
 
-public class ObjParser extends FileParser {
+public class ObjParser extends FileParser<FrameSet<List<Shape>>> {
 
   private static final float DEFAULT_ROTATE_SPEED = 3;
 
-  private final Vector3 cameraPos;
   private final Vector3 rotation;
   private final boolean isDefaultPosition;
   private final String filePath;
+  private final Camera camera;
 
   private WorldObject object;
-  private Camera camera;
-  private double focalLength;
 
   public ObjParser(String path, float rotateSpeed, float cameraX, float cameraY, float cameraZ,
-      float focalLength, boolean isDefaultPosition) throws IOException {
+      float focalLength, boolean isDefaultPosition) {
     rotateSpeed *= Math.PI / 1000;
     checkFileExtension(path);
     this.filePath = path;
-    this.cameraPos = new Vector3(cameraX, cameraY, cameraZ);
     this.isDefaultPosition = isDefaultPosition;
-    this.focalLength = focalLength;
+    Vector3 cameraPos = new Vector3(cameraX, cameraY, cameraZ);
+    this.camera = new Camera(focalLength, cameraPos);
     this.rotation = new Vector3(0, rotateSpeed, rotateSpeed);
-    parseFile(path);
   }
 
   public ObjParser(String path, float focalLength) throws IOException {
@@ -42,19 +42,14 @@ public class ObjParser extends FileParser {
   }
 
   @Override
-  protected void parseFile(String path) throws IllegalArgumentException, IOException {
-    object = new WorldObject(path);
-    camera = new Camera(focalLength, cameraPos);
+  public FrameSet<List<Shape>> parse() throws IllegalArgumentException, IOException {
+    object = new WorldObject(filePath);
 
     if (isDefaultPosition) {
       camera.findZPos(object);
     }
-  }
 
-  @Override
-  public List<Shape> nextFrame() {
-    object.rotate(rotation);
-    return camera.draw(object);
+    return new ObjFrameSet(object, camera, rotation);
   }
 
   @Override

src/main/java/sh/ball/parser/svg/SvgParser.java

@@ -19,27 +19,26 @@ import org.jsoup.Jsoup;
 import org.w3c.dom.Document;
 import org.w3c.dom.Node;
 import org.xml.sax.SAXException;
+import sh.ball.FrameSet;
 import sh.ball.parser.FileParser;
+import sh.ball.parser.ShapeFrameSet;
 import sh.ball.shapes.Shape;
 import sh.ball.shapes.Vector2;
 
-public class SvgParser extends FileParser {
+public class SvgParser extends FileParser<FrameSet<List<Shape>>> {
 
   private final Map<Character, Function<List<Float>, List<Shape>>> commandMap;
   private final SvgState state;
   private final String filePath;
 
-  private List<Shape> shapes;
   private Document svg;
 
-  public SvgParser(String path) throws IOException, SAXException, ParserConfigurationException {
+  public SvgParser(String path) {
     checkFileExtension(path);
     this.filePath = path;
-    this.shapes = new ArrayList<>();
     this.state = new SvgState();
     this.commandMap = new HashMap<>();
     initialiseCommandMap();
-    parseFile(path);
   }
 
   // Map command chars to function calls.
@@ -118,10 +117,11 @@ public class SvgParser extends FileParser {
   }
 
   @Override
-  protected void parseFile(String filePath)
+  public FrameSet<List<Shape>> parse()
       throws ParserConfigurationException, IOException, SAXException, IllegalArgumentException {
     this.svg = getXMLDocument(filePath);
     List<Node> svgElem = asList(svg.getElementsByTagName("svg"));
+    List<Shape> shapes = new ArrayList<>();
 
     if (svgElem.size() != 1) {
       throw new IllegalArgumentException("SVG has either zero or more than one svg element.");
@@ -132,7 +132,7 @@ public class SvgParser extends FileParser {
       shapes.addAll(parsePath(node.getNodeValue()));
     }
 
-    shapes = Shape.normalize(shapes);
+    return new ShapeFrameSet(Shape.normalize(shapes));
   }
 
   /* Given a character, will return the glyph associated with it.
@@ -196,11 +196,6 @@ public class SvgParser extends FileParser {
     return svgShapes;
   }
 
-  @Override
-  public List<Shape> nextFrame() {
-    return shapes;
-  }
-
   @Override
   public String getFilePath() {
     return filePath;

src/main/java/sh/ball/parser/txt/TextParser.java

@@ -1,4 +1,4 @@
-package sh.ball.parser;
+package sh.ball.parser.txt;
 
 import java.io.IOException;
 import java.nio.charset.Charset;
@@ -11,34 +11,31 @@ import java.util.Map;
 import javax.xml.parsers.ParserConfigurationException;
 
 import org.xml.sax.SAXException;
+import sh.ball.FrameSet;
+import sh.ball.parser.FileParser;
+import sh.ball.parser.ShapeFrameSet;
 import sh.ball.parser.svg.SvgParser;
 import sh.ball.shapes.Shape;
 import sh.ball.shapes.Vector2;
 
-public class TextParser extends FileParser {
+public class TextParser extends FileParser<FrameSet<List<Shape>>> {
 
   private static final char WIDE_CHAR = 'W';
   private static final double HEIGHT_SCALAR = 1.6;
   private static final String DEFAULT_FONT = TextParser.class.getResource("/fonts/SourceCodePro-ExtraLight.svg").getPath();
 
   private final Map<Character, List<Shape>> charToShape;
-  private final List<String> text;
   private final String filePath;
+  private final String fontPath;
 
-  private List<Shape> shapes;
-
-  public TextParser(String path, String font)
-    throws IOException, SAXException, ParserConfigurationException {
+  public TextParser(String path, String font) {
     checkFileExtension(path);
     this.filePath = path;
+    this.fontPath = font;
     this.charToShape = new HashMap<>();
-    this.shapes = new ArrayList<>();
-    this.text = Files.readAllLines(Paths.get(path), Charset.defaultCharset());
-    parseFile(font);
   }
 
-  public TextParser(String path)
-    throws IOException, SAXException, ParserConfigurationException {
+  public TextParser(String path) {
     this(path, DEFAULT_FONT);
   }
 
@@ -48,9 +45,11 @@ public class TextParser extends FileParser {
   }
 
   @Override
-  protected void parseFile(String path)
-    throws ParserConfigurationException, IOException, SAXException, IllegalArgumentException {
-    SvgParser parser = new SvgParser(path);
+  public FrameSet<List<Shape>> parse() throws IllegalArgumentException, IOException, ParserConfigurationException, SAXException {
+    List<String> text = Files.readAllLines(Paths.get(filePath), Charset.defaultCharset());
+    SvgParser parser = new SvgParser(fontPath);
+    parser.parse();
+    List<Shape> shapes = new ArrayList<>();
 
     /* WIDE_CHAR used as an example character that will be wide in most languages.
      * This helps determine the correct character width for the font chosen. */
@@ -78,12 +77,7 @@ public class TextParser extends FileParser {
       }
     }
 
-    shapes = Shape.flip(Shape.normalize(shapes));
-  }
-
-  @Override
-  public List<Shape> nextFrame() {
-    return shapes;
+    return new ShapeFrameSet(Shape.flip(Shape.normalize(shapes)));
   }
 
   @Override

src/test/java/sh/ball/SvgParserTest.java

@@ -4,11 +4,13 @@ import static org.junit.Assert.assertEquals;
 
 import java.io.IOException;
 import java.net.URISyntaxException;
+import java.util.List;
 import javax.xml.parsers.ParserConfigurationException;
 import org.junit.Test;
 import org.xml.sax.SAXException;
 import sh.ball.parser.svg.SvgParser;
 import sh.ball.shapes.Line;
+import sh.ball.shapes.Shape;
 import sh.ball.util.ClassLoaderUtil;
 
 public class SvgParserTest {
@@ -20,28 +22,28 @@ public class SvgParserTest {
   @Test
   public void lineToGeneratesALineShape()
       throws ParserConfigurationException, SAXException, IOException, URISyntaxException {
-    SvgParser svgParser = new SvgParser(getResource("images/line-to.svg"));
-    assertEquals(svgParser.nextFrame(), Line.pathToLines(0.5, 0.5, 0.75, 1, 0, 0, 0.5, 0.5));
+    FrameSet<List<Shape>> frames = new SvgParser(getResource("images/line-to.svg")).parse();
+    assertEquals(frames.next(), Line.pathToLines(0.5, 0.5, 0.75, 1, 0, 0, 0.5, 0.5));
   }
 
   @Test
   public void horizontalLineToGeneratesAHorizontalLineShape()
       throws ParserConfigurationException, SAXException, IOException, URISyntaxException {
-    SvgParser svgParser = new SvgParser(getResource("images/horizontal-line-to.svg"));
-    assertEquals(svgParser.nextFrame(), Line.pathToLines(0.5, 0.5, 0.75, 0.5, 0, 0.5, 0.5, 0.5));
+    FrameSet<List<Shape>> frames = new SvgParser(getResource("images/horizontal-line-to.svg")).parse();
+    assertEquals(frames.next(), Line.pathToLines(0.5, 0.5, 0.75, 0.5, 0, 0.5, 0.5, 0.5));
   }
 
   @Test
   public void verticalLineToGeneratesAVerticalLineShape()
       throws ParserConfigurationException, SAXException, IOException, URISyntaxException {
-    SvgParser svgParser = new SvgParser(getResource("images/vertical-line-to.svg"));
-    assertEquals(svgParser.nextFrame(), Line.pathToLines(0.5, 0.5, 0.5, 0.75, 0.5, 0, 0.5, 0.5));
+    FrameSet<List<Shape>> frames = new SvgParser(getResource("images/vertical-line-to.svg")).parse();
+    assertEquals(frames.next(), Line.pathToLines(0.5, 0.5, 0.5, 0.75, 0.5, 0, 0.5, 0.5));
   }
 
   @Test
   public void closingASubPathDrawsLineToInitialPoint()
       throws ParserConfigurationException, SAXException, IOException, URISyntaxException {
-    SvgParser svgParser = new SvgParser(getResource("images/closing-subpath.svg"));
-    assertEquals(svgParser.nextFrame(), Line.pathToLines(0.5, 0.5, 0.75, 0.5, 0.75, 0.75, 0.5, 0.75, 0.5, 0.5));
+    FrameSet<List<Shape>> frames = new SvgParser(getResource("images/closing-subpath.svg")).parse();
+    assertEquals(frames.next(), Line.pathToLines(0.5, 0.5, 0.75, 0.5, 0.75, 0.75, 0.5, 0.75, 0.5, 0.5));
   }
 }