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package oracle.toplink.essentials.ejb.cmp3.persistence;
import java.net.URL;
import java.net.URISyntaxException;
import java.net.JarURLConnection;
import java.util.Enumeration;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Iterator;
import java.util.Set;
import java.util.HashSet;
import java.net.URLDecoder;
import java.io.UnsupportedEncodingException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.persistence.spi.PersistenceUnitInfo;
import org.xml.sax.XMLReader;
import org.xml.sax.InputSource;
import oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException;
import oracle.toplink.essentials.exceptions.XMLParseException;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProcessor;
import oracle.toplink.essentials.internal.ejb.cmp3.xml.XMLConstants;
import oracle.toplink.essentials.internal.ejb.cmp3.xml.parser.PersistenceContentHandler;
import oracle.toplink.essentials.internal.ejb.cmp3.xml.parser.XMLException;
import oracle.toplink.essentials.internal.ejb.cmp3.xml.parser.XMLExceptionHandler;
import oracle.toplink.essentials.internal.sessions.AbstractSession;
import oracle.toplink.essentials.logging.AbstractSessionLog;
import oracle.toplink.essentials.logging.SessionLog;
/**
* INTERNAL:
* Utility Class that deals with persistence archives for EJB 3.0
* Provides functions like searching for persistence archives, processing
* persistence.xml and searching for Entities in a Persistence archive
*/
public class PersistenceUnitProcessor {
/**
* Entries in a zip file are directory entries using slashes to separate
* them. Build a class name using '.' instead of slash and removing the
* '.class' extension.
*/
public static String buildClassNameFromEntryString(String classEntryString){
String classNameForLoader = classEntryString;
if (classEntryString.endsWith(".class")){ // NOI18N
classNameForLoader = classNameForLoader.substring(0, classNameForLoader.length() - 6);;
classNameForLoader = classNameForLoader.replace("/", ".");
}
return classNameForLoader;
}
/**
* Build a set that contains all the class names at a URL.
* @return a Set of class name strings
*/
public static Set buildClassSet(PersistenceUnitInfo persistenceUnitInfo, ClassLoader loader){
Set set = new HashSet();
set.addAll(persistenceUnitInfo.getManagedClassNames());
Iterator i = persistenceUnitInfo.getJarFileUrls().iterator();
while (i.hasNext()) {
set.addAll(getClassNamesFromURL((URL)i.next()));
}
if (!persistenceUnitInfo.excludeUnlistedClasses()){
set.addAll(getClassNamesFromURL(persistenceUnitInfo.getPersistenceUnitRootUrl()));
}
set.addAll(buildPersistentClassSetFromXMLDocuments(persistenceUnitInfo, loader));
return set;
}
/**
* Create a list of the entities that will be deployed. This list is built
* from the information provided in the PersistenceUnitInfo argument.
* The list contains Classes specified in the PersistenceUnitInfo's class
* list and also files that are annotated with @Entity and @Embeddable in
* the jar files provided in the persistence info. This list of classes will
* used by TopLink to build a deployment project and to decide what classes
* to weave.
*/
public static Collection buildEntityList(MetadataProcessor processor, ClassLoader loader) {
ArrayList entityList = new ArrayList();
for (String className : processor.getProject().getWeavableClassNames()) {
try {
Class entityClass = loader.loadClass(className);
entityList.add(entityClass);
} catch (ClassNotFoundException exc) {
AbstractSessionLog.getLog().log(SessionLog.CONFIG, "exception_loading_entity_class", className, exc);
}
}
return entityList;
}
/**
* Return a Set of the classnames represented in the mapping files
* specified in info.
*/
private static Set buildPersistentClassSetFromXMLDocuments(PersistenceUnitInfo info, ClassLoader loader){
Set classes = null;
// Build a MetadataProcessor to search the mapped classes in orm xml documents
// We hand in a null session since none of the functionality required uses a session
MetadataProcessor processor = new MetadataProcessor(info, null, loader, false);
processor.readMappingFiles(false);
classes = processor.buildPersistenceUnitClassSetFromXMLDocuments();
return classes;
}
public static URL computePURootURL(URL pxmlURL) throws IOException {
String protocol = pxmlURL.getProtocol();
if("file".equals(protocol)) { // NOI18N
// e.g. file:/tmp/META-INF/persistence.xml
assert(new File(pxmlURL.getFile()).isFile());
return new URL(pxmlURL, ".."); // NOI18N
} else if("jar".equals(protocol)) { // NOI18N
// e.g. jar:file:/tmp/a_ear/b.jar!/META-INF/persistence.xml
JarURLConnection conn =
JarURLConnection.class.cast(pxmlURL.openConnection());
assert(conn.getJarEntry().getName().equals(
"META-INF/persistence.xml")); // NOI18N
return conn.getJarFileURL();
} else {
// some other protocol,
// e.g. bundleresource://21/META-INF/persistence.xml
return new URL(pxmlURL, "../"); // NOI18N
}
}
/**
* Search the classpath for persistence archives. A persistence archive is
* defined as any part of the class path that contains a META-INF directory
* with a persistence.xml file in it. Return a list of the URLs of those
* files. Use the current thread's context classloader to get the classpath.
* We assume it is a URL class loader.
*/
public static Set findPersistenceArchives(){
ClassLoader threadLoader = Thread.currentThread().getContextClassLoader();
return findPersistenceArchives(threadLoader);
}
/**
* Search the classpath for persistence archives. A persistence archive is
* defined as any part of the class path that contains a META-INF directory
* with a persistence.xml file in it. Return a list of {@link Archive}
* representing the root of those files.
* @param loader the class loader to get the class path from
*/
public static Set findPersistenceArchives(ClassLoader loader){
Set pars = new HashSet();
try {
Enumeration resources = loader.getResources("META-INF/persistence.xml");
while (resources.hasMoreElements()){
URL pxmlURL = resources.nextElement();
URL puRootURL = computePURootURL(pxmlURL);
Archive archive = new ArchiveFactoryImpl().createArchive(puRootURL);
pars.add(archive);
}
} catch (java.io.IOException exc){
throw PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(loader, exc);
} catch (URISyntaxException exc) {
throw PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(loader, exc);
}
return pars;
}
public static Set getClassNamesFromURL(URL url) {
Set classNames = new HashSet();
Archive archive = null;
try {
archive = new ArchiveFactoryImpl().createArchive(url);
} catch (URISyntaxException e) {
throw new RuntimeException("url = [" + url + "]", e); // NOI18N
} catch (IOException e) {
throw new RuntimeException("url = [" + url + "]", e); // NOI18N
}
for (Iterator entries = archive.getEntries(); entries.hasNext();) {
String entry = entries.next();
if (entry.endsWith(".class")){ // NOI18N
classNames.add(buildClassNameFromEntryString(entry));
}
}
return classNames;
}
/**
* Get a list of persitence units from the file or directory at the given
* url. PersistenceUnits are built based on the presence of persistence.xml
* in a META-INF directory at the base of the URL.
* @param archive The url of a jar file or directory to check
*/
public static List getPersistenceUnits(Archive archive, ClassLoader loader){
return processPersistenceArchive(archive, loader);
}
/**
* Return if a given class is annotated with @Embeddable.
*/
public static boolean isEmbeddable(Class candidateClass){
return candidateClass.isAnnotationPresent(javax.persistence.Embeddable.class);
}
/**
* Return if a given class is annotated with @Entity.
*/
public static boolean isEntity(Class candidateClass){
return candidateClass.isAnnotationPresent(javax.persistence.Entity.class);
}
/**
* Load the given class name with the given class loader.
*/
public static Class loadClass(String className, ClassLoader loader, boolean throwExceptionIfNotFound) {
Class candidateClass = null;
try {
candidateClass = loader.loadClass(className);
} catch (ClassNotFoundException exc){
if (throwExceptionIfNotFound){
throw PersistenceUnitLoadingException.exceptionLoadingClassWhileLookingForAnnotations(className, exc);
} else {
AbstractSessionLog.getLog().log(AbstractSessionLog.WARNING, "persistence_unit_processor_error_loading_class", exc.getClass().getName(), exc.getLocalizedMessage() , className);
}
} catch (Exception exception){
AbstractSessionLog.getLog().log(AbstractSessionLog.WARNING, "persistence_unit_processor_error_loading_class", exception.getClass().getName(), exception.getLocalizedMessage() , className);
}
return candidateClass;
}
/**
* Process the Object/relational metadata from XML and annotations
*/
public static void processORMetadata(MetadataProcessor processor, ClassLoader privateClassLoader, AbstractSession session, boolean throwExceptionOnFail){
// DO NOT CHANGE the order of invocation of various methods.
// Build the list of mapping files and read them. Need to do this before
// we start processing entities as the list of entity classes depend on
// metadata read from mapping files.
processor.readMappingFiles(throwExceptionOnFail);
// Process persistence unit metadata/defaults defined in ORM XML
// instance documents in the persistence unit
processor.processPersistenceUnitMetadata();
//bug:2647 - need to find/process entities after the persistenceUnitMetadata to unsure defaults are overriden.
processor.processPersistenceUnitClasses();
// Process the actual PU classes metadata from XML.
processor.processMappingFiles();
// Process the actual PU classes metadata from annotations.
processor.processAnnotations();
}
/**
* Go through the jar file for this PeristeneUnitProcessor and process any
* XML provided in it.
*/
public static List processPersistenceArchive(Archive archive, ClassLoader loader){
URL puRootURL = archive.getRootURL();
try {
InputStream pxmlStream = archive.getEntry("META-INF/persistence.xml"); // NOI18N
return processPersistenceXML(puRootURL, pxmlStream, loader);
} catch (IOException e) {
throw PersistenceUnitLoadingException.exceptionLoadingFromUrl(puRootURL.toString(), e);
}
}
/**
* Build a persistence.xml file into a SEPersistenceUnitInfo object.
*/
private static List processPersistenceXML(URL baseURL, InputStream input, ClassLoader loader){
SAXParserFactory spf = SAXParserFactory.newInstance();
spf.setNamespaceAware(true);
spf.setValidating(true);
XMLReader xmlReader = null;
SAXParser sp = null;
XMLExceptionHandler xmlErrorHandler = new XMLExceptionHandler();
// create a SAX parser
try {
sp = spf.newSAXParser();
sp.setProperty(XMLConstants.SCHEMA_LANGUAGE, XMLConstants.XML_SCHEMA);
} catch (javax.xml.parsers.ParserConfigurationException exc){
throw XMLParseException.exceptionCreatingSAXParser(baseURL, exc);
} catch (org.xml.sax.SAXException exc){
throw XMLParseException.exceptionCreatingSAXParser(baseURL, exc);
}
// create an XMLReader
try {
xmlReader = sp.getXMLReader();
xmlReader.setErrorHandler(xmlErrorHandler);
} catch (org.xml.sax.SAXException exc){
throw XMLParseException.exceptionCreatingXMLReader(baseURL, exc);
}
// attempt to load the schema from the classpath
URL schemaURL = loader.getResource(XMLConstants.PERSISTENCE_SCHEMA_NAME);
if (schemaURL != null) {
try {
sp.setProperty(XMLConstants.JAXP_SCHEMA_SOURCE, schemaURL.toString());
} catch (org.xml.sax.SAXException exc){
throw XMLParseException.exceptionSettingSchemaSource(baseURL, schemaURL, exc);
}
}
PersistenceContentHandler myContentHandler = new PersistenceContentHandler();
xmlReader.setContentHandler(myContentHandler);
InputSource inputSource = new InputSource(input);
try{
xmlReader.parse(inputSource);
} catch (IOException exc){
throw PersistenceUnitLoadingException.exceptionProcessingPersistenceXML(baseURL, exc);
} catch (org.xml.sax.SAXException exc){
// XMLErrorHandler will handle SAX exceptions
}
// handle any parse exceptions
XMLException xmlError = xmlErrorHandler.getXMLException();
if (xmlError != null) {
throw PersistenceUnitLoadingException.exceptionProcessingPersistenceXML(baseURL, xmlError);
}
Iterator persistenceInfos = myContentHandler.getPersistenceUnits().iterator();
while (persistenceInfos.hasNext()){
SEPersistenceUnitInfo info = persistenceInfos.next();
info.setPersistenceUnitRootUrl(baseURL);
}
return myContentHandler.getPersistenceUnits();
}
/**
* Build the unique persistence name by concatenating the decoded URL with persistence unit name.
* Decoding url is required in multibytes OS.
* @param URL
* @param puName
* @return String
*/
public static String buildPersistenceUnitName(URL url, String puName){
String fullPuName = null;
try {
fullPuName = URLDecoder.decode(url.toString(), "UTF8")+puName;
} catch (UnsupportedEncodingException e) {
throw PersistenceUnitLoadingException.couldNotBuildPersistenceUntiName(e,url.toString(),puName);
}
return fullPuName;
}
}
