Day01：filter过滤

相比于@where，filter可以在runtime的时候customized条件
public enum AccountType {
DEBIT,
CREDIT
}

@Entity(name = "Client")
public static class Client {

@Id
private Long id;

private String name;

@OneToMany(mappedBy = "client")
@Filter(name="activeAccount", condition="active = :active")
private List accounts = new ArrayList<>( );

//Getters and setters omitted for brevity

}

@Entity(name = "Account")
@FilterDef(name="activeAccount", parameters=@ParamDef( name="active", type="boolean" ) )
@Filter(name="activeAccount", condition="active = :active")
public static class Account {

@Id
private Long id;

@ManyToOne
private Client client;

@Column(name = "account_type")
@Enumerated(EnumType.STRING)
private AccountType type;

private Double amount;

private Double rate;

private boolean active;

//Getters and setters omitted for brevity

}