Add Data Paint Components

Author: UltimatePea

src/paintcomponents/DataFromPoint.java

@@ -0,0 +1,52 @@
+package paintcomponents;
+
+import java.util.Queue;
+import java.util.concurrent.LinkedBlockingQueue;
+
+/**
+ * This point consumes data and tries to pass the data along a connecting line
+ * segment
+ * 
+ * @author chenzb
+ *
+ */
+public class DataFromPoint<T> extends SimplePoint {
+	
+	
+	DataLineSegment<T> lineSegment;
+	Queue<T> datas;
+
+	/**
+	 * @return the lineSegment
+	 */
+	public DataLineSegment<T> getLineSegment() {
+		return lineSegment;
+	}
+
+	/**
+	 * @param lineSegment
+	 *            the lineSegment to set
+	 */
+	public void setLineSegment(DataLineSegment<T> lineSegment) {
+		this.lineSegment = lineSegment;
+	}
+
+	public DataFromPoint(int x, int y) {
+		super(x, y);
+		datas = new LinkedBlockingQueue<>();
+	}
+	
+	public void offer(T data){
+		this.datas.offer(data);
+	}
+	
+	/**
+	 * Fetches the data, users should not try to call this method, except from DataToPoint class
+	 * returns null if the underlying queue is empty.
+	 * @param data
+	 */
+	protected T poll(){
+		return this.datas.poll();
+	}
+
+}

src/paintcomponents/DataLineSegment.java

@@ -0,0 +1,23 @@
+package paintcomponents;
+
+public class DataLineSegment<T> extends LineSegment {
+
+	public DataLineSegment(DataFromPoint<T> fromPoint, DataToPoint<T> toPoint) {
+		super(fromPoint, toPoint);
+
+	}
+	
+	@SuppressWarnings("unchecked")
+	@Override
+	public DataFromPoint<T> getFromPoint() {
+		return (DataFromPoint<T>) super.getFromPoint();
+	}
+	
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public DataToPoint<T> getToPoint() {
+		return (DataToPoint<T>) super.getToPoint();
+	}
+
+}

src/paintcomponents/DataToPoint.java

@@ -0,0 +1,51 @@
+package paintcomponents;
+
+import java.util.NoSuchElementException;
+
+/**
+ * Data to point is the point where data is flowing to.
+ * You can "get" data from this point
+ * @author chenzb
+ *
+ */
+public class DataToPoint<T> extends SimplePoint {
+	
+	
+	DataLineSegment<T> lineSegment;
+
+	/**
+	 * @return the lineSegment
+	 */
+	public DataLineSegment<T> getLineSegment() {
+		return lineSegment;
+	}
+
+	/**
+	 * @param lineSegment the lineSegment to set
+	 */
+	public void setLineSegment(DataLineSegment<T> lineSegment) {
+		this.lineSegment = lineSegment;
+	}
+
+	public DataToPoint(int x, int y) {
+		super(x, y);
+	}
+	
+	
+	/**
+	 * Try to fetch a data from a connecting point
+	 * 
+	 * @throws NoConnectingLineSegmentException when this point is not connected to a valid line segment
+	 * @throws NoSuchElementException when the connecting in point does not have a data to offer
+	 */
+	public T fetchData() throws NoConnectingLineSegmentException, NoSuchElementException{
+		if(this.lineSegment == null) throw new NoConnectingLineSegmentException();
+		
+		T returnVal = lineSegment.getFromPoint().poll();
+		if(returnVal == null) throw new NoSuchElementException();
+		return returnVal;
+		
+	}
+	
+
+}

src/paintcomponents/LineSegment.java

@@ -61,6 +61,11 @@ public LineSegment(SimplePoint fromPoint, SimplePoint toPoint,
 		this.strokeWidth = strokeWidth;
 	}
 
+	/**
+	 * Constructs a line segment with default width and default height.
+	 * @param fromPoint
+	 * @param toPoint
+	 */
 	public LineSegment(SimplePoint fromPoint, SimplePoint toPoint) {
 		this(fromPoint, toPoint,
 				Defaults.sharedDefaults().defaultColorForLineSegment(),

src/paintcomponents/NoConnectingLineSegmentException.java

@@ -0,0 +1,5 @@
+package paintcomponents;
+
+public class NoConnectingLineSegmentException extends Exception {
+
+}