ExtendedFieldTypeDAO (NetarchiveSuite 7.0 API)

java.lang.Object
- dk.netarkivet.harvester.datamodel.extendedfield.ExtendedFieldTypeDAO

All Implemented Interfaces:

DAO

Direct Known Subclasses:

ExtendedFieldTypeDBDAO
```
public abstract class ExtendedFieldTypeDAO
extends java.lang.Object
implements DAO
```
Interface for creating and accessing extended fields in persistent storage.

Field Summary

Fields
Modifier and Type Field Description

protected static ExtendedFieldTypeDAO instance
The database singleton model.

Constructor Summary

Constructors
Modifier Constructor Description

protected ExtendedFieldTypeDAO()
constructor used when creating singleton.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract boolean`	`exists(java.lang.Long aExtendedfieldtypeId)`	Tests if exists an ExtendedFieldType with the given ID.
`abstract java.util.List<ExtendedFieldType>`	`getAll()`
`static ExtendedFieldTypeDAO`	`getInstance()`	If an instance exists, return it, otherwise instantiate one, and return it.
`abstract ExtendedFieldType`	`read(java.lang.Long aExtendedfieldtypeId)`	Read an ExtendedFieldType belonging to the given id.
`protected static void`	`reset()`	Reset the DAO instance.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - instance
```
protected static ExtendedFieldTypeDAO instance
```
    The database singleton model.
- Constructor Detail
  - ExtendedFieldTypeDAO
```
protected ExtendedFieldTypeDAO()
```
    constructor used when creating singleton. Do not call directly.
- Method Detail
  - reset
```
protected static void reset()
```
    Reset the DAO instance. Only for use from within tests.
  - exists
```
public abstract boolean exists(java.lang.Long aExtendedfieldtypeId)
```
    Tests if exists an ExtendedFieldType with the given ID.
    
    Parameters:
    
    aExtendedfieldtypeId - An id belonging to an ExtendedFieldType
    
    Returns:
    
    true, if there exists an ExtendedFieldType with the given ID, otherwise returns false.
  - read
```
public abstract ExtendedFieldType read(java.lang.Long aExtendedfieldtypeId)
```
    Read an ExtendedFieldType belonging to the given id.
    
    Parameters:
    
    aExtendedfieldtypeId - an id belonging to a ExtendedFieldType
    
    Returns:
    
    an ExtendedFieldType from belonging to the given id.
  - getAll
```
public abstract java.util.List<ExtendedFieldType> getAll()
```
    Returns:
    
    a list of all ExtendedFieldTypes.
  - getInstance
```
public static ExtendedFieldTypeDAO getInstance()
```
    If an instance exists, return it, otherwise instantiate one, and return it.
    
    Returns:
    
    the instance of this class.