org.modeshape.connector.git
Class GitConnector

java.lang.Object
  org.modeshape.jcr.federation.spi.Connector
      org.modeshape.jcr.federation.spi.ReadOnlyConnector
          org.modeshape.connector.git.GitConnector

All Implemented Interfaces:

Pageable

public class GitConnector
extends ReadOnlyConnector
implements Pageable

A read-only Connector that accesses the content in a local Git repository that is a clone of a remote repository.

This connector has several properties that must be configured via the RepositoryConfiguration:

• directoryPath - The path to the folder that is or contains the .git data structure is to be accessed by this connector.
• remoteName - The alias used by the local Git repository for the remote repository. The default is the "origin". If the value contains commas, the value contains an ordered list of remote aliases that should be searched; the first one to match an existing remote will be used.
• queryableBranches - An array with the names of the branches that should be queryable by the repository. By default, only the master branch is queryable.

The connector results in the following structure:

Path	Description
/branches/{branchName}	The list of branches.
/tags/{tagName}	The list of tags.
/commits/{branchOrTagNameOrCommit}/{objectId}	The history of commits on the branch, tag or object ID name "{branchOrTagNameOrCommit}", where " {objectId}" is the object ID of the commit.
/commit/{branchOrTagNameOrCommit}	The information about a particular branch, tag or commit "{branchOrTagNameOrCommit}".
/tree/{branchOrTagOrObjectId}/{filesAndFolders}/...	The structure of the directories and files in the specified branch, tag or commit "{branchOrTagNameOrCommit}".

Nested Class Summary

Nested classes/interfaces inherited from class org.modeshape.jcr.federation.spi.Connector

Connector.ExtraProperties

Constructor Summary

GitConnector()

Method Summary

ExternalBinaryValue	getBinaryValue(String id) Returns a binary value which is connector specific and which is never stored by ModeShape.
Document	getChildReference(String parentKey, String childKey) Returns a document representing a single child reference from the supplied parent to the supplied child.
Document	getChildren(PageKey pageKey) Returns a document which represents a page of children.
Document	getDocumentById(String id) Returns a Document instance representing the document with a given id.
String	getDocumentId(String path) Returns the id of an external node located at the given path.
protected List<String>	getQueryableBranches()
boolean	hasDocument(String id) Checks if a document with the given id exists in the end-source.
protected boolean	includeMimeType()
void	initialize(NamespaceRegistry registry, NodeTypeManager nodeTypeManager) Initialize the connector.
protected DocumentWriter	newDocumentWriter(String id)
protected String	remoteName()
void	shutdown() Shutdown the connector by releasing all resources.

Methods inherited from class org.modeshape.jcr.federation.spi.ReadOnlyConnector

isReadonly, newDocumentId, removeDocument, storeDocument, updateDocument

Methods inherited from class org.modeshape.jcr.federation.spi.Connector

checkFieldNotNull, extraPropertiesFor, extraPropertiesStore, factories, getCacheTtlSeconds, getContext, getLogger, getMimeTypeDetector, getRepositoryName, getSourceName, getTransactionManager, isQueryable, nameFrom, nameFrom, nameFrom, newChildReference, newDocument, newPageDocument, propertyFactory, readDocument, setExtraPropertiesStore, translator

Methods inherited from class java.lang.Object

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

Constructor Detail

GitConnector

public GitConnector()

Method Detail

initialize

public void initialize(NamespaceRegistry registry,
                       NodeTypeManager nodeTypeManager)
                throws RepositoryException,
                       IOException

Description copied from class: Connector

Initialize the connector. This is called automatically by ModeShape once for each Connector instance, and should not be called by the connector. By the time this method is called, ModeShape will hav already set the Connector.context, Connector.logger, Connector.name, and Connector.repositoryName plus any fields that match configuration properties for the connector.

By default this method does nothing, so it should be overridden by implementations to do a one-time initialization of any internal components. For example, connectors can use the supplied registry and nodeTypeManager objects to register custom namesapces and node types required by the external content.

This is an excellent place for connector to validate the connector-specific fields set by ModeShape via reflection during instantiation.

Overrides:

initialize in class Connector

Parameters:

registry - the namespace registry that can be used to register custom namespaces; never null

nodeTypeManager - the node type manager that can be used to register custom node types; never null

Throws:

RepositoryException - if operations on the NamespaceRegistry or NodeTypeManager fail

IOException - if any stream based operations fail (like importing cnd files)

newDocumentWriter

protected DocumentWriter newDocumentWriter(String id)

includeMimeType

protected boolean includeMimeType()

shutdown

public void shutdown()

Description copied from class: Connector

Shutdown the connector by releasing all resources. This is called automatically by ModeShape when this Connector instance is no longer needed, and should never be called by the connector.

Overrides:

shutdown in class Connector

getDocumentById

public Document getDocumentById(String id)

Description copied from class: Connector

Returns a Document instance representing the document with a given id. The document should have a "proper" structure for it to be usable by ModeShape.

Specified by:

getDocumentById in class Connector

Parameters:

id - a non-null string

Returns:

either an Document instance or null

getChildren

public Document getChildren(PageKey pageKey)

Description copied from interface: Pageable

Returns a document which represents a page of children. In order to add a next page, PageWriter.addPage(String, String, long, long) should be used to add a new page of children.

Specified by:

getChildren in interface Pageable

Parameters:

pageKey - a non-null PageKey instance, which offers information about the page that should be retrieved.

Returns:

either a non-null page document or null indicating that such a page doesn't exist

getChildReference

public Document getChildReference(String parentKey,
                                  String childKey)

Description copied from class: Connector

Returns a document representing a single child reference from the supplied parent to the supplied child. This method is called when there are an unknown number of children on a node.

This method should be implemented and will be called if and only if a connector uses paging and specifies an unknown number of children in the PageWriter.addPage(String, int, long, long) or PageWriter.addPage(String, String, long, long) methods.

Overrides:

getChildReference in class Connector

Parameters:

parentKey - the key for the parent

childKey - the key for the child

Returns:

the document representation of a child reference, of null if the parent does not contain a child with the given key

getDocumentId

public String getDocumentId(String path)

Description copied from class: Connector

Returns the id of an external node located at the given path.

Specified by:

getDocumentId in class Connector

Parameters:

path - a non-null string representing an exeternal path.

Returns:

either the id of the document or null

hasDocument

public boolean hasDocument(String id)

Description copied from class: Connector

Checks if a document with the given id exists in the end-source.

Specified by:

hasDocument in class Connector

Parameters:

id - a non-null string.

Returns:

true if such a document exists, false otherwise.

getBinaryValue

public ExternalBinaryValue getBinaryValue(String id)

Description copied from class: Connector

Returns a binary value which is connector specific and which is never stored by ModeShape. Connectors who need this feature must return an object that is an instance of a subclasses of ExternalBinaryValue, either UrlBinaryValue or a custom subclass with connector-specific information.

Normally, the Connector.getDocumentById(String) method implementation will set binary values on properties of nodes, which should create the same ExternalBinaryValue subclass that is returned by this method. The ExternalBinaryValue.getId() value from that instance will be passed into this method.

Overrides:

getBinaryValue in class Connector

Parameters:

id - a String representing the identifier of the external binary which should have connector-specific meaning. This identifier need not be the SHA-1 hash of the content.

Returns:

either a binary value implementation or null if there is no such value with the given id.

remoteName

protected final String remoteName()

getQueryableBranches

protected List<String> getQueryableBranches()