make order an active record class as well + javadoc (iluwatar#79)

active-record/src/main/java/com/iluwatar/activerecord/Order.java

@@ -1,7 +1,9 @@
 package com.iluwatar.activerecord;
 
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
 import lombok.AllArgsConstructor;
-import lombok.EqualsAndHashCode;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
@@ -11,11 +13,26 @@
  */
 @Getter
 @Setter
-@EqualsAndHashCode(onlyExplicitlyIncluded = true)
 @NoArgsConstructor
 @AllArgsConstructor
-public class Order {
+public class Order extends RecordBase<Order> {
 
   private Long id;
   private String orderNumber;
+
+  @Override
+  protected String getTableName() {
+    return "order";
+  }
+
+  @Override
+  protected void setFieldsFromResultSet(ResultSet rs) throws SQLException {
+    this.id = rs.getLong("id");
+    this.orderNumber = rs.getString("order_number");
+  }
+
+  @Override
+  protected void setPreparedStatementParams(PreparedStatement pstmt) throws SQLException {
+    // TODO
+  }
 }

active-record/src/main/java/com/iluwatar/activerecord/RecordBase.java

@@ -13,6 +13,9 @@
 
 /**
  * An active record base supposed to hold all the necessary active record pattern logic.
+ * <p>
+ * This is the base class which is supposed to be extended by all the domain models that are
+ * expected to be persistent.
  *
  * @param <T> an active record type.
  */