Package org.datanucleus.metadata.xml

Class PersistenceXmlMetaDataHandler

java.lang.Object

org.xml.sax.helpers.DefaultHandler

org.datanucleus.metadata.xml.AbstractXmlMetaDataHandler

org.datanucleus.metadata.xml.PersistenceXmlMetaDataHandler

All Implemented Interfaces:

ContentHandler, DTDHandler, EntityResolver, ErrorHandler

public class PersistenceXmlMetaDataHandler
extends AbstractXmlMetaDataHandler

XML parser handler for "persistence.xml" files to convert them into a PersistenceFileMetaData. Implements DefaultHandler and handles the extracting of MetaData from the XML elements/attributes. This class simply constructs the MetaData representation mirroring what is in the XML MetaData file.

Operates the parse process using a Stack. XML MetaData components are added to the stack as they are encountered and created. They are then popped off the stack when the end element is encountered.

Field Summary

Fields inherited from class org.datanucleus.metadata.xml.AbstractXmlMetaDataHandler

charactersBuffer, clr, entityResolver, filename, metadata, mmgr, stack, validate

Constructor Summary

Constructors

Constructor	Description
PersistenceXmlMetaDataHandler(MetaDataManager mgr, String filename, EntityResolver resolver)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	endElement(String uri, String localName, String qName)	Handler method called at the end of an element.
void	startElement(String uri, String localName, String qName, Attributes attrs)	Handler method called at the start of an element.

Methods inherited from class org.datanucleus.metadata.xml.AbstractXmlMetaDataHandler

characters, error, getAttr, getAttr, getMetaData, getStack, getString, isPersistenceContext, popStack, pushStack, resolveEntity, setValidate

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

endDocument, endPrefixMapping, fatalError, ignorableWhitespace, notationDecl, processingInstruction, setDocumentLocator, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl, warning

Methods inherited from class java.lang.Object

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

Constructor Detail

PersistenceXmlMetaDataHandler

public PersistenceXmlMetaDataHandler(MetaDataManager mgr,
                                     String filename,
                                     EntityResolver resolver)

Constructor. Protected to prevent instantiation.

Parameters:

mgr - the metadata manager (not used)

filename - The name of the file to parse

resolver - Entity Resolver to use (null if not available)

Method Detail

startElement

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

Handler method called at the start of an element.

Specified by:

startElement in interface ContentHandler

Overrides:

startElement in class DefaultHandler

Parameters:

uri - URI of the tag

localName - Local name

qName - Element name

attrs - Attributes for this element

Throws:

SAXException - in parsing errors

endElement

public void endElement(String uri,
                       String localName,
                       String qName)
                throws SAXException

Handler method called at the end of an element.

Specified by:

endElement in interface ContentHandler

Overrides:

endElement in class DefaultHandler

Parameters:

uri - URI of the tag

localName - local name

qName - Name of element just ending

Throws:

SAXException - in parsing errors