Implement developer classes and criteria for product filtering

src/main/java/net/itsthesky/projetbut2/ocp/PriceRangeCriteria.java

@@ -0,0 +1,18 @@
+package net.itsthesky.projetbut2.ocp;
+
+import net.itsthesky.projetbut2.ocp.base.Product;
+
+public class PriceRangeCriteria implements Criteria<Product> {
+
+    private final double minPrice;
+    private final double maxPrice;
+    public PriceRangeCriteria(double minPrice, double maxPrice) {
+        this.minPrice = minPrice;
+        this.maxPrice = maxPrice;
+    }
+
+    @Override
+    public boolean isSatisfied(Product product) {
+        return product.price >= minPrice && product.price <= maxPrice;
+    }
+}