com.impetus.kundera.loader

Class PersistenceXMLLoader

java.lang.Object

com.impetus.kundera.loader.PersistenceXMLLoader

public class PersistenceXMLLoader
extends Object

The Class PersistenceXMLLoader.

Author:

amresh.singh

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PersistenceXMLLoader.AllowedProtocol Allowed protocols
static class	PersistenceXMLLoader.ErrorLogger The Class ErrorLogger.

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	log The log.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	PersistenceXMLLoader() Instantiates a new persistence xml loader.

Method Summary

Methods

Modifier and Type	Method and Description
static List<PersistenceUnitMetadata>	findPersistenceUnits(URL url, String[] persistenceUnits) Find persistence units.
static List<PersistenceUnitMetadata>	findPersistenceUnits(URL url, String[] persistenceUnits, javax.persistence.spi.PersistenceUnitTransactionType defaultTransactionType) Find persistence units.
private static Document	getDocument(URL pathToPersistenceXml) Reads the persistence xml content into an object graph and validates it against the related xsd schema.
static String	getElementContent(Element element) Gets the element content.
private static String	getElementContent(Element element, String defaultStr) Get the content of the given element.
private static URL	getPersistenceRootUrl(URL url) Returns persistence unit root url
private static InputStream	getStreamFromClasspath(String fileName) Get stream from classpath.
static javax.persistence.spi.PersistenceUnitTransactionType	getTransactionType(String elementContent) Gets the transaction type.
private static boolean	isEmpty(String str) Checks if is empty.
private static Document	parseDocument(InputStream is) Reads the content of the persistence.xml file into an object model, with the root node of type Document.
private static String	parseFilePath(String file) Parse and exclude path till META-INF
private static PersistenceUnitMetadata	parsePersistenceUnit(URL url, String[] persistenceUnits, Element top, String versionName) Parses the persistence unit.
private static void	validateDocumentAgainstSchema(Document xmlRootNode) Validates an xml object graph against its schema.

Methods inherited from class java.lang.Object

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

Field Detail

log

private static org.slf4j.Logger log

The log.

Constructor Detail

PersistenceXMLLoader

private PersistenceXMLLoader()

Instantiates a new persistence xml loader.

Method Detail

getDocument

private static Document getDocument(URL pathToPersistenceXml)
                             throws InvalidConfigurationException

Reads the persistence xml content into an object graph and validates it against the related xsd schema.

Parameters:

pathToPersistenceXml - path to the persistence.xml file

Returns:

parsed persistence xml as object graph

Throws:

InvalidConfigurationException - if the file could not be parsed or is not valid against the schema

parseDocument

private static Document parseDocument(InputStream is)
                               throws InvalidConfigurationException

Reads the content of the persistence.xml file into an object model, with the root node of type Document.

Parameters:

is - InputStream of the persistence.xml content

Returns:

root node of the parsed xml content

Throws:

InvalidConfigurationException - if the content could not be read due to an I/O error or could not be parsedÏ

validateDocumentAgainstSchema

private static void validateDocumentAgainstSchema(Document xmlRootNode)
                                           throws InvalidConfigurationException

Validates an xml object graph against its schema. Therefore it reads the version from the root tag and tries to load the related xsd file from the classpath.

Parameters:

xmlRootNode - root xml node of the document to validate

Throws:

InvalidConfigurationException - if the validation could not be performed or the xml graph is invalid against the schema

getStreamFromClasspath

private static InputStream getStreamFromClasspath(String fileName)

Get stream from classpath.

Parameters:

fileName - the file name

Returns:

the stream

Throws:

Exception - the exception

findPersistenceUnits

public static List<PersistenceUnitMetadata> findPersistenceUnits(URL url,
                                                 String[] persistenceUnits)
                                                          throws Exception

Find persistence units.

Parameters:

url - the url

Returns:

the list

Throws:

Exception - the exception

findPersistenceUnits

public static List<PersistenceUnitMetadata> findPersistenceUnits(URL url,
                                                 String[] persistenceUnits,
                                                 javax.persistence.spi.PersistenceUnitTransactionType defaultTransactionType)
                                                          throws InvalidConfigurationException

Find persistence units.

Parameters:

url - the url

defaultTransactionType - the default transaction type

Returns:

the list

Throws:

Exception - the exception

InvalidConfigurationException

parsePersistenceUnit

private static PersistenceUnitMetadata parsePersistenceUnit(URL url,
                                           String[] persistenceUnits,
                                           Element top,
                                           String versionName)

Parses the persistence unit.

Parameters:

top - the top

Returns:

the persistence metadata

Throws:

Exception - the exception

getTransactionType

public static javax.persistence.spi.PersistenceUnitTransactionType getTransactionType(String elementContent)

Gets the transaction type.

Parameters:

elementContent - the element content

Returns:

the transaction type

isEmpty

private static boolean isEmpty(String str)

Checks if is empty.

Parameters:

str - the str

Returns:

true, if is empty

getElementContent

public static String getElementContent(Element element)

Gets the element content.

Parameters:

element - the element

Returns:

the element content

Throws:

Exception - the exception

getElementContent

private static String getElementContent(Element element,
                       String defaultStr)

Get the content of the given element.

Parameters:

element - The element to get the content for.

defaultStr - The default to return when there is no content.

Returns:

The content of the element or the default.

Throws:

Exception - the exception

getPersistenceRootUrl

private static URL getPersistenceRootUrl(URL url)

Returns persistence unit root url

Parameters:

url - raw url

Returns:

rootUrl rootUrl

parseFilePath

private static String parseFilePath(String file)

Parse and exclude path till META-INF

Parameters:

file - raw file path.

Returns:

extracted/parsed file path.