init

src/org/fog/application/selectivity/SelectivityModel.java

@@ -0,0 +1,28 @@
+package org.fog.application.selectivity;
+
+/**
+ * Class representing the input-output relationships of application modules.
+ * @author Harshit Gupta
+ *
+ */
+public interface SelectivityModel {
+
+	/**
+	 * Function called to check whether incoming tuple can generate an output tuple.
+	 * @return true if a tuple can be emitted (selection possible)
+	 */
+	public boolean canSelect();
+	
+	/**
+	 * Average number of tuples generated per incoming input tuple.
+	 * @return avg tuple generation rate
+	 */
+	public double getMeanRate();
+	
+	/**
+	 * Maximum number of tuples generated per incoming input tuple.
+	 * @return max tuple generation rate
+	 */
+	public double getMaxRate();
+	
+}