CustomerDaoImpl is an implementation of the CustomerDao interface that provides an interface for the persistence layer of an application. It is an implementation of the Data Access Object pattern. The pattern provides an abstract layer between the application and the data access layer, allowing for easy access to the data. This pattern also allows for more flexibility when it comes to adding and removing data from the database.
The CustomerDaoImpl provides an interface for the retrieval, updating, and deleting of customer data. It is used to access the customer data from the database and is used to construct the Customer object. It also provides methods for creating new customers, updating existing customers, deleting customers, and searching for customers.
When using the CustomerDaoImpl, the application can access the customer data by calling the appropriate methods. These methods are usually called by the application when a customer is created, updated, or deleted.
The CustomerDaoImpl can also be used to query the database for customer data. This is done by passing a query string to the CustomerDaoImpl. The query string can contain a variety of parameters, such as the customer id, name, or address. The query string is then passed to the database and the results are returned.
The CustomerDaoImpl also provides methods for creating, updating, and deleting customer data. These methods are used to add or modify customer data in the database. For example, when creating a new customer, the CustomerDaoImpl can be used to insert the customer data into the database. Similarly, when updating an existing customer, the CustomerDaoImpl can be used to update the customer data in the database.
Another use of the CustomerDaoImpl is to search for customer data. This is done by passing a query string to the CustomerDaoImpl. The query string contains the search criteria, such as the customer id, name, or address. The results are then returned by the CustomerDaoImpl.
The CustomerDaoImpl is an essential part of any application that needs to access customer data. It provides an interface for the persistence layer of the application and allows for easy access to the data. It also provides methods for creating, updating, and deleting customer data. Additionally, it provides methods for searching for customer data.