ContactDao (Wicket Phonebook Example 9.3.0 API)

All Known Implementing Classes:

HibernateContactDao, ShadesContactDao
```
public interface ContactDao
```
The implementation-independent DAO interface. Defines the operations required to be supported by an implementation.

Author:

igor

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`count(Contact filter)`	Return the number of Contacts in the DB.
`void`	`delete(long id)`	Delete a `Contact` from the DB, given it's `id`.
`Iterator<Contact>`	`find(QueryParam qp, Contact filter)`	Query the DB, using the supplied query details.
`List<String>`	`getUniqueLastNames()`	Returns the list of all unique last names in the database
`Contact`	`load(long id)`	Load a `Contact` from the DB, given it's `id`.
`Contact`	`save(Contact contact)`	Save the contact to the DB

- Method Detail
  - load
```
Contact load(long id)
```
    Load a Contact from the DB, given it's id.
    
    Parameters:
    
    id - The id of the Contact to load.
    
    Returns:
    
    Contact
  - save
```
Contact save(Contact contact)
```
    Save the contact to the DB
    
    Parameters:
    
    contact -
    
    Returns:
    
    persistent instance of contact
  - delete
```
void delete(long id)
```
    Delete a Contact from the DB, given it's id.
    
    Parameters:
    
    id - The id of the Contact to delete.
  - find
```
Iterator<Contact> find(QueryParam qp,
                       Contact filter)
```
    Query the DB, using the supplied query details.
    
    Parameters:
    
    qp - Query Paramaters to use.
    
    Returns:
    
    The results of the query as an Iterator.
  - count
```
int count(Contact filter)
```
    Return the number of Contacts in the DB.
    
    Returns:
    
    count
  - getUniqueLastNames
```
List<String> getUniqueLastNames()
```
    Returns the list of all unique last names in the database
    
    Returns:
    
    the list of all unique last names in the database