org.alfresco.repo.content.selector

Class XPathContentWorkerSelector<W extends ContentWorker>

java.lang.Object

org.alfresco.repo.content.selector.XPathContentWorkerSelector<W>

All Implemented Interfaces:

ContentWorkerSelector

public class XPathContentWorkerSelector<W extends ContentWorker>
extends Object
implements ContentWorkerSelector

A selector that executes a set of XPath statements against the XML document to determine which content worker to provide. The XPath rules are simple, i.e. if an XML node is found by the XPath statement, then it is considered to be a hit and the corresponding worker is returned.

Currently, the only namespaces supported are those contained in the XML documents being tested.

Since:

2.1

Author:

Derek Hulley

Constructor Summary

Constructors

Constructor and Description
XPathContentWorkerSelector()

Method Summary

Modifier and Type	Method and Description
W	getWorker(org.alfresco.service.cmr.repository.ContentReader reader) Execute the XPath statements, in order, against the document.
void	init() Checks the configuration.
void	setSupportedMimetypes(Set<String> supportedMimetypes) Optionally set the mimetypes supported.
void	setWorkers(Map<String,W> workers) Set the workers to use.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

XPathContentWorkerSelector

public XPathContentWorkerSelector()

Method Detail

toString

public String toString()

Overrides:

toString in class Object

setSupportedMimetypes

public void setSupportedMimetypes(Set<String> supportedMimetypes)

Optionally set the mimetypes supported. They must be XML formats that the chosen parser will be able to handle.

Parameters:

supportedMimetypes - the list of mimetypes. The default is text/xml.

setWorkers

public void setWorkers(Map<String,W> workers)

Set the workers to use. All the XPath statements provided must be compatible with a return value of type NODE.

Parameters:

workers - a map of ContentWorker instances keyed by XPath statements

init

public void init()

Checks the configuration.

getWorker

public W getWorker(org.alfresco.service.cmr.repository.ContentReader reader)

Execute the XPath statements, in order, against the document. Any statements that fail to run will be ignored.

Specified by:

getWorker in interface ContentWorkerSelector

Parameters:

reader - the content reader, providing the actual stream metadata and even the stream, if required.

Returns:

Return a worker that can operate on the content, or null if this identifier doesn't support the content.