org.alfresco.repo.virtual.ref

Class Reference

java.lang.Object

org.alfresco.repo.virtual.ref.Reference

public class Reference
extends Object

A generic, immutable virtualized artefact reference.
Refers virtualized artefacts through :

• a Protocol - defines what kind of virtualzied artefact is referred by this reference as well as what virtualization process was applied
• a Resource - identifies the main resource used in the virtualization (egg. a classpath location or repository node reference)
• a list of ResourceParameters - used in customizing the virtualization process (egg. a resource pointing to the actual node of a semi-virtual folder reference)

Author:

Bogdan Horje

Constructor Summary

Constructors

Constructor and Description
Reference(Encoding encoding, Protocol protocol, Resource resource)
Reference(Encoding encoding, Protocol protocol, Resource resource, List<? extends Parameter> parameters) Constructor

Method Summary

Modifier and Type	Method and Description
String	encode()
String	encode(Encoding anEncoding)
boolean	equals(Object obj)
<R> R	execute(ProtocolMethod<R> method) Double-dispatches ProtocolMethods. Uses Protocol.dispatch(ProtocolMethod, Reference) to trigger concrete protocol based double dispatch ProtocolMethod::execute invocation on the given method object.
static Reference	fromNodeRef(NodeRef nodeRef) NodeRef Reference representation decoder/converter method. Creates a Reference representation based on the ID of the given NodeRef. It expects a VIRTUAL_TOKEN prefixed encoded string.
Encoding	getEncoding()
List<Parameter>	getParameters()
Protocol	getProtocol()
Resource	getResource()
int	hashCode()
static boolean	isReference(NodeRef nodeRef) Deprecated.
Reference	propagateNodeRefMutations(NodeRef mutatedNodeRef) Despite claimed NodeRef opacity Alfresco sometimes alters NodeRefs representation to achieve functionality.
NodeRef	toNodeRef()
NodeRef	toNodeRef(StoreRef storeRef)
NodeRef	toNodeRef(StoreRef storeRef, Encoding encoding)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Reference

public Reference(Encoding encoding,
                 Protocol protocol,
                 Resource resource,
                 List<? extends Parameter> parameters)

Constructor

Parameters:

encoding - the default Encoding of the new resource - to be used where an encoding is required and none is specified

protocol -

resource -

parameters - resource parameters - a copy of the provided list will be stored by this reference

Reference

public Reference(Encoding encoding,
                 Protocol protocol,
                 Resource resource)

Method Detail

isReference

public static final boolean isReference(NodeRef nodeRef)

Deprecated.

Quick Reference compliance check of a NodeRef.
NodeRef Reference representations validated by this method should produce valid Reference objects based on the given NodeRef when passed to the fromNodeRef(NodeRef) method.

Parameters:

nodeRef -

Returns:

true if the given NodeRef is a valid Reference representation
false otherwise

fromNodeRef

public static final Reference fromNodeRef(NodeRef nodeRef)

NodeRef Reference representation decoder/converter method.
Creates a Reference representation based on the ID of the given NodeRef.
It expects a VIRTUAL_TOKEN prefixed encoded string. The encoded string must start with a valid Encoding token. The Reference representation structure is (no delimiters between the 3 elements): VIRTUAL_TOKEN ENCODING_TOKEN referenceString Given that a valid encoding was detected Encoding.urlNative information is used to obtain a reference string. The reference string is parsed using the encoding configured parser.

Parameters:

nodeRef -

Returns:

the Reference object corresponding to the given NodeRef

encode

public String encode()
              throws ReferenceEncodingException

Returns:

a String representation of this reference using its default Encoding

Throws:

ReferenceEncodingException

encode

public String encode(Encoding anEncoding)
              throws ReferenceEncodingException

Parameters:

anEncoding -

Returns:

a String representation of this reference using the given Encoding

Throws:

ReferenceEncodingException

getEncoding

public Encoding getEncoding()

Returns:

the default Encoding of this reference

getProtocol

public Protocol getProtocol()

getResource

public Resource getResource()

getParameters

public List<Parameter> getParameters()

toNodeRef

public NodeRef toNodeRef()
                  throws ReferenceEncodingException

Returns:

a NodeRef representation of this resource using the StoreRef.STORE_REF_WORKSPACE_SPACESSTORE and the default encoding of this resource

Throws:

ReferenceEncodingException

toNodeRef

public NodeRef toNodeRef(StoreRef storeRef)
                  throws ReferenceEncodingException

Parameters:

storeRef -

Returns:

a NodeRef representation of this resource using the given StoreRef and the default encoding of this resource

Throws:

ReferenceEncodingException

toNodeRef

public NodeRef toNodeRef(StoreRef storeRef,
                         Encoding encoding)
                  throws ReferenceEncodingException

Parameters:

storeRef -

encoding -

Returns:

a NodeRef representation of this resource using the given StoreRef and Encoding

Throws:

ReferenceEncodingException

execute

public <R> R execute(ProtocolMethod<R> method)
              throws ProtocolMethodException

Double-dispatches ProtocolMethods.
Uses Protocol.dispatch(ProtocolMethod, Reference) to trigger concrete protocol based double dispatch ProtocolMethod::execute invocation on the given method object.

Parameters:

method -

Returns:

the dispatched method execution result

Throws:

ProtocolMethodException

propagateNodeRefMutations

public Reference propagateNodeRefMutations(NodeRef mutatedNodeRef)

Despite claimed NodeRef opacity Alfresco sometimes alters NodeRefs representation to achieve functionality. For example see VersionUtil.convertNodeRef(NodeRef).
We say that altered NodeRefs have suffered mutations and we try to detect those mutations and create a correspondent reference.

Parameters:

mutatedNodeRef -

Returns:

a mutated version of this Reference corresponding to the given mutated node or this Reference if no mutations are detected

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object