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A module of the Hibernate O/RM project
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.jpa.boot.internal;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import javax.persistence.PersistenceException;
import javax.persistence.spi.PersistenceUnitTransactionType;
import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import org.hibernate.boot.archive.internal.ArchiveHelper;
import org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl;
import org.hibernate.boot.registry.classloading.spi.ClassLoaderService;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.internal.util.xml.XsdException;
import org.hibernate.jpa.AvailableSettings;
import org.hibernate.jpa.internal.EntityManagerMessageLogger;
import org.hibernate.jpa.internal.util.ConfigurationHelper;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import static org.hibernate.jpa.internal.HEMLogging.messageLogger;
/**
* Used by Hibernate to parse {@code persistence.xml} files in SE environments.
*
* @author Steve Ebersole
*/
public class PersistenceXmlParser {
private static final EntityManagerMessageLogger LOG = messageLogger( PersistenceXmlParser.class );
private final ClassLoaderService classLoaderService;
private final PersistenceUnitTransactionType defaultTransactionType;
public static List locatePersistenceUnits(Map integration) {
final PersistenceXmlParser parser = new PersistenceXmlParser(
ClassLoaderServiceImpl.fromConfigSettings( integration ),
PersistenceUnitTransactionType.RESOURCE_LOCAL
);
return parser.doResolve( integration );
}
public PersistenceXmlParser(ClassLoaderService classLoaderService, PersistenceUnitTransactionType defaultTransactionType) {
this.classLoaderService = classLoaderService;
this.defaultTransactionType = defaultTransactionType;
}
public List doResolve(Map integration) {
final List persistenceUnits = new ArrayList();
final List xmlUrls = classLoaderService.locateResources( "META-INF/persistence.xml" );
if ( xmlUrls.isEmpty() ) {
LOG.unableToFindPersistenceXmlInClasspath();
}
else {
for ( URL xmlUrl : xmlUrls ) {
persistenceUnits.addAll( parsePersistenceXml( xmlUrl, integration ) );
}
}
return persistenceUnits;
}
private List parsePersistenceXml(URL xmlUrl, Map integration) {
LOG.tracef( "Attempting to parse persistence.xml file : %s", xmlUrl.toExternalForm() );
final Document doc = loadUrl( xmlUrl );
final Element top = doc.getDocumentElement();
final List persistenceUnits = new ArrayList();
final NodeList children = top.getChildNodes();
for ( int i = 0; i < children.getLength() ; i++ ) {
if ( children.item( i ).getNodeType() == Node.ELEMENT_NODE ) {
final Element element = (Element) children.item( i );
final String tag = element.getTagName();
if ( tag.equals( "persistence-unit" ) ) {
final URL puRootUrl = ArchiveHelper.getJarURLFromURLEntry( xmlUrl, "/META-INF/persistence.xml" );
ParsedPersistenceXmlDescriptor persistenceUnit = new ParsedPersistenceXmlDescriptor( puRootUrl );
bindPersistenceUnit( persistenceUnit, element );
// per JPA spec, any settings passed in to PersistenceProvider bootstrap methods should override
// values found in persistence.xml
if ( integration.containsKey( AvailableSettings.PROVIDER ) ) {
persistenceUnit.setProviderClassName( (String) integration.get( AvailableSettings.PROVIDER ) );
}
if ( integration.containsKey( AvailableSettings.TRANSACTION_TYPE ) ) {
String transactionType = (String) integration.get( AvailableSettings.TRANSACTION_TYPE );
persistenceUnit.setTransactionType( parseTransactionType( transactionType ) );
}
if ( integration.containsKey( AvailableSettings.JTA_DATASOURCE ) ) {
persistenceUnit.setJtaDataSource( integration.get( AvailableSettings.JTA_DATASOURCE ) );
}
if ( integration.containsKey( AvailableSettings.NON_JTA_DATASOURCE ) ) {
persistenceUnit.setNonJtaDataSource( integration.get( AvailableSettings.NON_JTA_DATASOURCE ) );
}
decodeTransactionType( persistenceUnit );
Properties properties = persistenceUnit.getProperties();
ConfigurationHelper.overrideProperties( properties, integration );
persistenceUnits.add( persistenceUnit );
}
}
}
return persistenceUnits;
}
private void decodeTransactionType(ParsedPersistenceXmlDescriptor persistenceUnit) {
// if transaction type is set already
// use that value
// else
// if JTA DS
// use JTA
// else if NOT JTA DS
// use RESOURCE_LOCAL
// else
// use defaultTransactionType
if ( persistenceUnit.getTransactionType() != null ) {
return;
}
if ( persistenceUnit.getJtaDataSource() != null ) {
persistenceUnit.setTransactionType( PersistenceUnitTransactionType.JTA );
}
else if ( persistenceUnit.getNonJtaDataSource() != null ) {
persistenceUnit.setTransactionType( PersistenceUnitTransactionType.RESOURCE_LOCAL );
}
else {
persistenceUnit.setTransactionType( defaultTransactionType );
}
}
private void bindPersistenceUnit(ParsedPersistenceXmlDescriptor persistenceUnit, Element persistenceUnitElement) {
final String name = persistenceUnitElement.getAttribute( "name" );
if ( StringHelper.isNotEmpty( name ) ) {
LOG.tracef( "Persistence unit name from persistence.xml : %s", name );
persistenceUnit.setName( name );
}
final PersistenceUnitTransactionType transactionType = parseTransactionType(
persistenceUnitElement.getAttribute( "transaction-type" )
);
if ( transactionType != null ) {
persistenceUnit.setTransactionType( transactionType );
}
NodeList children = persistenceUnitElement.getChildNodes();
for ( int i = 0; i < children.getLength() ; i++ ) {
if ( children.item( i ).getNodeType() == Node.ELEMENT_NODE ) {
Element element = (Element) children.item( i );
String tag = element.getTagName();
if ( tag.equals( "non-jta-data-source" ) ) {
persistenceUnit.setNonJtaDataSource( extractContent( element ) );
}
else if ( tag.equals( "jta-data-source" ) ) {
persistenceUnit.setJtaDataSource( extractContent( element ) );
}
else if ( tag.equals( "provider" ) ) {
persistenceUnit.setProviderClassName( extractContent( element ) );
}
else if ( tag.equals( "class" ) ) {
persistenceUnit.addClasses( extractContent( element ) );
}
else if ( tag.equals( "mapping-file" ) ) {
persistenceUnit.addMappingFiles( extractContent( element ) );
}
else if ( tag.equals( "jar-file" ) ) {
persistenceUnit.addJarFileUrl( ArchiveHelper.getURLFromPath( extractContent( element ) ) );
}
else if ( tag.equals( "exclude-unlisted-classes" ) ) {
persistenceUnit.setExcludeUnlistedClasses( extractBooleanContent(element, true) );
}
else if ( tag.equals( "delimited-identifiers" ) ) {
persistenceUnit.setUseQuotedIdentifiers( true );
}
else if ( tag.equals( "validation-mode" ) ) {
persistenceUnit.setValidationMode( extractContent( element ) );
}
else if ( tag.equals( "shared-cache-mode" ) ) {
persistenceUnit.setSharedCacheMode( extractContent( element ) );
}
else if ( tag.equals( "properties" ) ) {
NodeList props = element.getChildNodes();
for ( int j = 0; j < props.getLength() ; j++ ) {
if ( props.item( j ).getNodeType() == Node.ELEMENT_NODE ) {
Element propElement = (Element) props.item( j );
if ( !"property".equals( propElement.getTagName() ) ) {
continue;
}
String propName = propElement.getAttribute( "name" ).trim();
String propValue = propElement.getAttribute( "value" ).trim();
if ( StringHelper.isEmpty( propValue ) ) {
//fall back to the natural (Hibernate) way of description
propValue = extractContent( propElement, "" );
}
persistenceUnit.getProperties().put( propName, propValue );
}
}
}
}
}
}
private static String extractContent(Element element) {
return extractContent( element, null );
}
private static String extractContent(Element element, String defaultStr) {
if ( element == null ) {
return defaultStr;
}
NodeList children = element.getChildNodes();
StringBuilder result = new StringBuilder("");
for ( int i = 0; i < children.getLength() ; i++ ) {
if ( children.item( i ).getNodeType() == Node.TEXT_NODE ||
children.item( i ).getNodeType() == Node.CDATA_SECTION_NODE ) {
result.append( children.item( i ).getNodeValue() );
}
}
return result.toString().trim();
}
private static boolean extractBooleanContent(Element element, boolean defaultBool) {
String content = extractContent( element );
if (content != null && content.length() > 0) {
return Boolean.valueOf(content);
}
return defaultBool;
}
private static PersistenceUnitTransactionType parseTransactionType(String value) {
if ( StringHelper.isEmpty( value ) ) {
return null;
}
else if ( value.equalsIgnoreCase( "JTA" ) ) {
return PersistenceUnitTransactionType.JTA;
}
else if ( value.equalsIgnoreCase( "RESOURCE_LOCAL" ) ) {
return PersistenceUnitTransactionType.RESOURCE_LOCAL;
}
else {
throw new PersistenceException( "Unknown persistence unit transaction type : " + value );
}
}
private Document loadUrl(URL xmlUrl) {
final String resourceName = xmlUrl.toExternalForm();
try {
URLConnection conn = xmlUrl.openConnection();
conn.setUseCaches( false ); //avoid JAR locking on Windows and Tomcat
try {
InputStream inputStream = conn.getInputStream();
try {
final InputSource inputSource = new InputSource( inputStream );
try {
DocumentBuilder documentBuilder = documentBuilderFactory().newDocumentBuilder();
try {
Document document = documentBuilder.parse( inputSource );
validate( document );
return document;
}
catch (SAXException e) {
throw new PersistenceException( "Unexpected error parsing [" + resourceName + "]", e );
}
catch (IOException e) {
throw new PersistenceException( "Unexpected error parsing [" + resourceName + "]", e );
}
}
catch (ParserConfigurationException e) {
throw new PersistenceException( "Unable to generate javax.xml.parsers.DocumentBuilder instance", e );
}
}
finally {
try {
inputStream.close();
}
catch (Exception ignored) {
}
}
}
catch (IOException e) {
throw new PersistenceException( "Unable to obtain input stream from [" + resourceName + "]", e );
}
}
catch (IOException e) {
throw new PersistenceException( "Unable to access [" + resourceName + "]", e );
}
}
private void validate(Document document) {
// todo : add ability to disable validation...
final Validator validator;
final String version = document.getDocumentElement().getAttribute( "version" );
if ( "2.1".equals( version ) ) {
validator = v21Schema().newValidator();
}
else if ( "2.0".equals( version ) ) {
validator = v2Schema().newValidator();
}
else if ( "1.0".equals( version ) ) {
validator = v1Schema().newValidator();
}
else {
throw new PersistenceException( "Unrecognized persistence.xml version [" + version + "]" );
}
List errors = new ArrayList();
validator.setErrorHandler( new ErrorHandlerImpl( errors ) );
try {
validator.validate( new DOMSource( document ) );
}
catch (SAXException e) {
errors.add( e );
}
catch (IOException e) {
throw new PersistenceException( "Unable to validate persistence.xml", e );
}
if ( errors.size() != 0 ) {
//report all errors in the exception
StringBuilder errorMessage = new StringBuilder( );
for ( SAXException error : errors ) {
errorMessage.append( extractInfo( error ) ).append( '\n' );
}
throw new PersistenceException( "Invalid persistence.xml.\n" + errorMessage.toString() );
}
}
private DocumentBuilderFactory documentBuilderFactory;
private DocumentBuilderFactory documentBuilderFactory() {
if ( documentBuilderFactory == null ) {
documentBuilderFactory = buildDocumentBuilderFactory();
}
return documentBuilderFactory;
}
private DocumentBuilderFactory buildDocumentBuilderFactory() {
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
documentBuilderFactory.setNamespaceAware( true );
return documentBuilderFactory;
}
private Schema v21Schema;
private Schema v21Schema() {
if ( v21Schema == null ) {
v21Schema = resolveLocalSchema( "org/hibernate/jpa/persistence_2_1.xsd" );
}
return v21Schema;
}
private Schema v2Schema;
private Schema v2Schema() {
if ( v2Schema == null ) {
v2Schema = resolveLocalSchema( "org/hibernate/jpa/persistence_2_0.xsd" );
}
return v2Schema;
}
private Schema v1Schema;
private Schema v1Schema() {
if ( v1Schema == null ) {
v1Schema = resolveLocalSchema( "org/hibernate/jpa/persistence_1_0.xsd" );
}
return v1Schema;
}
private Schema resolveLocalSchema(String schemaName) {
// These XSD resources should be available on the Hibernate ClassLoader
final URL url = classLoaderService.locateResource( schemaName );
if ( url == null ) {
throw new XsdException( "Unable to locate schema [" + schemaName + "] via classpath", schemaName );
}
try {
InputStream schemaStream = url.openStream();
try {
StreamSource source = new StreamSource( url.openStream() );
SchemaFactory schemaFactory = SchemaFactory.newInstance( XMLConstants.W3C_XML_SCHEMA_NS_URI );
return schemaFactory.newSchema( source );
}
catch ( SAXException e ) {
throw new XsdException( "Unable to load schema [" + schemaName + "]", e, schemaName );
}
catch ( IOException e ) {
throw new XsdException( "Unable to load schema [" + schemaName + "]", e, schemaName );
}
finally {
try {
schemaStream.close();
}
catch ( IOException e ) {
LOG.debugf( "Problem closing schema stream [%s]", e.toString() );
}
}
}
catch ( IOException e ) {
throw new XsdException( "Stream error handling schema url [" + url.toExternalForm() + "]", schemaName );
}
}
public static class ErrorHandlerImpl implements ErrorHandler {
private List errors;
ErrorHandlerImpl(List errors) {
this.errors = errors;
}
public void error(SAXParseException error) {
errors.add( error );
}
public void fatalError(SAXParseException error) {
errors.add( error );
}
public void warning(SAXParseException warn) {
LOG.trace( extractInfo( warn ) );
}
}
private static String extractInfo(SAXException error) {
if ( error instanceof SAXParseException ) {
return "Error parsing XML [line : " + ( (SAXParseException) error ).getLineNumber()
+ ", column : " + ( (SAXParseException) error ).getColumnNumber()
+ "] : " + error.getMessage();
}
else {
return "Error parsing XML : " + error.getMessage();
}
}
}
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