Package org.alfresco.repo.content.selector

Class RootElementNameContentWorkerSelector<W extends ContentWorker>

java.lang.Object

org.xml.sax.helpers.DefaultHandler

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

All Implemented Interfaces:

ContentWorkerSelector<ContentWorker>, ContentHandler, DTDHandler, EntityResolver, ErrorHandler

public class RootElementNameContentWorkerSelector<W extends ContentWorker>
extends DefaultHandler
implements ContentWorkerSelector<ContentWorker>

A selector that looks at the root node of an XML document to determine which worker to provide. There are many ways to identify XML documents and this is probably the simplest. Alternate implementations might execute a series of xpath statements or look for specific namespace declarations in the document. The net result is the same, i.e. given an XML document, a worker is provided to the caller.

Since:

2.1

Author:

Derek Hulley

Constructor Summary

Constructors

Constructor	Description
RootElementNameContentWorkerSelector()

Method Summary

Modifier and Type	Method	Description
W	getWorker(ContentReader reader)	Performs a match of the root element name to find the correct content worker.
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 choose from.
void	startElement(String uri, String localName, String qName, Attributes attributes)
String	toString()

Methods inherited from class org.xml.sax.helpers.DefaultHandler

characters, endDocument, endElement, endPrefixMapping, error, fatalError, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, setDocumentLocator, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl, warning

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.xml.sax.ContentHandler

declaration

Constructor Details

RootElementNameContentWorkerSelector

public RootElementNameContentWorkerSelector()

Method Details

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 choose from.

Parameters:

workers - a map of ContentWorker instances keyed by root element name

init

public void init()

Checks the configuration.

getWorker

public W getWorker(ContentReader reader)

Performs a match of the root element name to find the correct content worker.

Specified by:

getWorker in interface ContentWorkerSelector<W extends ContentWorker>

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.

startElement

public void startElement(String uri,
 String localName,
 String qName,
 Attributes attributes)
                  throws SAXException

Specified by:

startElement in interface ContentHandler

Overrides:

startElement in class DefaultHandler

Throws:

SAXException