Package org.alfresco.repo.attributes

Class AttributeServiceImpl

java.lang.Object

org.alfresco.repo.attributes.AttributeServiceImpl

All Implemented Interfaces:

AttributeService

public class AttributeServiceImpl
extends Object
implements AttributeService

Layers on the storage of property values to provide generic attribute storage

Author:

Derek Hulley

See Also:

• PropertyValueDAO

Nested Class Summary

Nested classes/interfaces inherited from interface org.alfresco.service.cmr.attributes.AttributeService

AttributeService.AttributeQueryCallback

Constructor Summary

Constructors

Constructor	Description
AttributeServiceImpl()

Method Summary

Modifier and Type	Method	Description
void	createAttribute(Serializable value, Serializable... keys)	Create an attribute with an optional value, assuming there is no existing attribute using the same keys.
boolean	exists(Serializable... keys)	Determine if a particular attribute exists.
Serializable	getAttribute(Serializable... keys)	Get an attribute using a list of unique keys
void	getAttributes(AttributeService.AttributeQueryCallback callback, Serializable... keys)	Get all attributes that share the starter keys provided.
void	removeAttribute(Serializable... keys)	Remove a specific attribute.
void	removeAttributes(Serializable... keys)	Remove all attributes that share a set of keys (in order)
void	setAttribute(Serializable value, Serializable... keys)	Set an attribute, overwriting its prior value if it already existed.
void	setPropertyValueDAO(PropertyValueDAO propertyValueDAO)	Set the DAO that handles the unique property persistence
void	updateOrCreateAttribute(Serializable keyBefore1, Serializable keyBefore2, Serializable keyBefore3, Serializable keyAfter1, Serializable keyAfter2, Serializable keyAfter3)	Update an attribute key whilst preserving the associated value (if any).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AttributeServiceImpl

public AttributeServiceImpl()

Method Details

setPropertyValueDAO

public void setPropertyValueDAO(PropertyValueDAO propertyValueDAO)

Set the DAO that handles the unique property persistence

exists

public boolean exists(Serializable... keys)

Determine if a particular attribute exists.

Specified by:

exists in interface AttributeService

Parameters:

keys - List of 1 to 3 keys to uniquely identify the attribute

Returns:

true if the attribute exists (regardless of its value) or false if it doesn't exist

getAttribute

public Serializable getAttribute(Serializable... keys)

Get an attribute using a list of unique keys

Specified by:

getAttribute in interface AttributeService

Parameters:

keys - List of 1 to 3 keys to uniquely identify the attribute

Returns:

The attribute value or null

getAttributes

public void getAttributes(AttributeService.AttributeQueryCallback callback,
 Serializable... keys)

Get all attributes that share the starter keys provided. If 3 key values are given, there can be, at most, one result.

Specified by:

getAttributes in interface AttributeService

Parameters:

callback - the callback that handles the results

keys - 0 to 3 key values to search against

setAttribute

public void setAttribute(Serializable value,
 Serializable... keys)

Set an attribute, overwriting its prior value if it already existed. null values are treated as unique i.e. if the value set is null then AttributeService.exists(Serializable...) will still return true. If the attribute doesn't exist, it will be created otherwise it will be modified.

Specified by:

setAttribute in interface AttributeService

Parameters:

value - The value to store (can be a collection or null)

keys - List of 1 to 3 keys to uniquely identify the attribute

createAttribute

public void createAttribute(Serializable value,
 Serializable... keys)

Create an attribute with an optional value, assuming there is no existing attribute using the same keys.

Specified by:

createAttribute in interface AttributeService

Parameters:

value - The value to store (can be a collection or null)

keys - List of 1 to 3 keys to uniquely identify the attribute

updateOrCreateAttribute

public void updateOrCreateAttribute(Serializable keyBefore1,
 Serializable keyBefore2,
 Serializable keyBefore3,
 Serializable keyAfter1,
 Serializable keyAfter2,
 Serializable keyAfter3)

Update an attribute key whilst preserving the associated value (if any). If there is no existing key matching the original value, then nothing will happen.

Specified by:

updateOrCreateAttribute in interface AttributeService

Parameters:

keyBefore1 - the first part of the original unique key (never null)

keyBefore2 - the second part of the original unique key (null allowed)

keyBefore3 - the third part of the original unique key (null allowed)

keyAfter1 - the first part of the new unique key (never null)

keyAfter2 - the second part of the new unique key (null allowed)

keyAfter3 - the third part of the new unique key (null allowed)

removeAttribute

public void removeAttribute(Serializable... keys)

Remove a specific attribute.

Specified by:

removeAttribute in interface AttributeService

Parameters:

keys - up to 3 keys to uniquely identify the attribute

removeAttributes

public void removeAttributes(Serializable... keys)

Remove all attributes that share a set of keys (in order)

Specified by:

removeAttributes in interface AttributeService

Parameters:

keys - up to 3 keys to identify attributes to remove