org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContextFactory Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of eclipselink Show documentation
Show all versions of eclipselink Show documentation
EclipseLink build based upon Git transaction f2b9fc5
/*
* Copyright (c) 2011, 2021 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Rick Barkhouse - 2.1 - Initial implementation
package org.eclipse.persistence.jaxb.dynamic;
import java.io.InputStream;
import java.util.Map;
import jakarta.xml.bind.JAXBException;
import javax.xml.transform.Source;
import org.eclipse.persistence.internal.core.helper.CoreClassConstants;
import org.eclipse.persistence.internal.oxm.Constants;
import org.eclipse.persistence.internal.oxm.XMLConversionManager;
import org.eclipse.persistence.jaxb.JAXBContextFactory;
import org.eclipse.persistence.jaxb.JAXBContextProperties;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext.MetadataContextInput;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext.SchemaContextInput;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext.SessionsXmlContextInput;
import org.w3c.dom.Node;
import org.xml.sax.EntityResolver;
/**
*
* DynamicJAXBContextFactory allows the user to create a DynamicJAXBContext without having
* realized Java classes available on the classpath. During context creation, the user's
* metadata will be analyzed, and in-memory classes will be generated.
*
*
*
* Objects that are returned by EclipseLink unmarshal methods will be subclasses of DynamicEntity.
* DynamicEntities offer a simple get(propertyName) / set(propertyName, propertyValue) API to
* manipulate their data.
*
*
*
* Example:
*
*
*
* ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
* InputStream iStream = classLoader.getResourceAsStream("resource/MySchema.xsd");
*
* Map<String, Object> properties = new HashMap<String, Object>();
* properties.put(DynamicJAXBContextFactory.XML_SCHEMA_KEY, iStream);
*
* DynamicJAXBContext jaxbContext = (DynamicJAXBContext) JAXBContext.newInstance("org.example", classLoader, properties);
*
* DynamicEntity employee = jaxbContext.newDynamicEntity("org.example.Employee");
* employee.set("firstName", "Bob");
* employee.set("lastName", "Barker");
* jaxbContext.createMarshaller().(employee, System.out);
*
*
* @see jakarta.xml.bind.JAXBContext
* @see org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext
* @see org.eclipse.persistence.dynamic.DynamicEntity
* @see org.eclipse.persistence.dynamic.DynamicType
*
* @author rbarkhouse
* @since EclipseLink 2.1
*/
public class DynamicJAXBContextFactory {
public static final String XML_SCHEMA_KEY = "xml-schema";
public static final String ENTITY_RESOLVER_KEY = "entity-resolver";
public static final String EXTERNAL_BINDINGS_KEY = "external-bindings";
public static final String SCHEMAMETADATA_CLASS_NAME = "org.eclipse.persistence.jaxb.dynamic.metadata.SchemaMetadata";
/**
* Create a DynamicJAXBContext, using either an XML Schema, EclipseLink OXM file,
* or EclipseLink sessions.xml as the metadata source. This creation method will be
* called if the user calls the newInstance() method on jakarta.xml.bind.JAXBContext,
* and has specified jakarta.xml.bind.JAXBContextFactory=org.eclipse.persistence.jaxb.DynamicJAXBContextFactory in their
* jaxb.properties file.
*
* -- Context Creation From XML Schema --
*
* The properties map must contain the following key/value pairs:
*
* - DynamicJAXBContextFactory.XML_SCHEMA_KEY
*
- Either a
org.w3c.dom.Node, javax.xml.transform.Source, or java.io.InputStream pointing to the XML Schema
* - DynamicJAXBContextFactory.ENTITY_RESOLVER_KEY
*
- An
org.xml.sax.EntityResolver, used to resolve schema imports. Can be null.
*
*
* Example:
*
* ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
* InputStream iStream = classLoader.getResourceAsStream("resource/MySchema.xsd");
*
* Map<String, Object> properties = new HashMap<String, Object>();
* properties.put(DynamicJAXBContextFactory.XML_SCHEMA_KEY, iStream);
*
* DynamicJAXBContext jaxbContext = (DynamicJAXBContext) JAXBContext.newInstance("org.example", classLoader, properties);
* DynamicEntity emp = jaxbContext.newDynamicEntity("org.example.Employee");
* ...
*
*
* Context Creation From EclipseLink OXM:
*
* The properties map must contain the key JAXBContextProperties.OXM_METADATA_SOURCE, which can have
* several possible values:
*
*
* - One of the following, pointing to your OXM file:
java.io.File, java.io.InputStream, java.io.Reader, java.net.URL,
* javax.xml.stream.XMLEventReader, javax.xml.stream.XMLStreamReader, javax.xml.transform.Source,
* org.w3c.dom.Node, or org.xml.sax.InputSource.
* - A
List of objects from the set above.
* - A
Map<String, Object>, where String is a package name, and Object is the pointer to the OXM file, from the set
* of possibilities above. If using this option, a package-name element is not required in the xml-bindings
* element of your OXM file.
*
*
* Example:
*
* ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
* InputStream iStream = classLoader.getResourceAsStream("resource/eclipselink-oxm.xml");
*
* Map<String, Object> properties = new HashMap<String, Object>();
* properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, iStream);
*
* DynamicJAXBContext jaxbContext = (DynamicJAXBContext) JAXBContext.newInstance("org.example", classLoader, properties);
* DynamicEntity emp = jaxbContext.newDynamicEntity("org.example.Employee");
* ...
*
*
* Context Creation From EclipseLink sessions.xml:
*
* The sessionNames parameter is a colon-delimited list of session names within the
* sessions.xml file. Descriptors in this session's Project must not
* have javaClass set, but must have javaClassName set.
*
* Example:
*
* ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
*
* DynamicJAXBContext jaxbContext = (DynamicJAXBContext) JAXBContext.newInstance("org.example", classLoader, null);
* DynamicEntity emp = jaxbContext.newDynamicEntity("org.example.Employee");
* ...
*
*
* @param contextPath
* A colon-delimited String specifying the packages containing jaxb.properties. If bootstrapping
* from EclipseLink sessions.xml, this will also be the name(s) of your sessions.
* @param classLoader
* The application's current class loader, which will be used to first lookup
* classes to see if they exist before new DynamicTypes are generated. Can be
* null, in which case Thread.currentThread().getContextClassLoader() will be used.
* @param properties
* Map of properties to use when creating a new DynamicJAXBContext. Can be null if bootstrapping from sessions.xml.
*
* @return
* A new instance of DynamicJAXBContext.
*
* @throws JAXBException
* if an error was encountered while creating the DynamicJAXBContext.
*/
public static DynamicJAXBContext createContext(String contextPath, ClassLoader classLoader, Map properties) throws JAXBException {
Object schema = null;
EntityResolver resolver = null;
Object bindings = null;
if (properties != null) {
schema = properties.get(XML_SCHEMA_KEY);
resolver = (EntityResolver) properties.get(ENTITY_RESOLVER_KEY);
if ((bindings = properties.get(JAXBContextProperties.OXM_METADATA_SOURCE)) == null) {
// try looking up the 'old' metadata source key
bindings = properties.get(JAXBContextFactory.ECLIPSELINK_OXM_XML_KEY);
}
}
// First try looking for an XSD
if (schema != null) {
if (schema instanceof Node) {
return createContextFromXSD((Node) schema, resolver, classLoader, properties);
}
if (schema instanceof InputStream) {
return createContextFromXSD((InputStream) schema, resolver, classLoader, properties);
}
if (schema instanceof Source) {
return createContextFromXSD((Source) schema, resolver, classLoader, properties);
}
}
// Next, check for OXM
if (bindings != null) {
return createContextFromOXM(classLoader, properties);
}
// Lastly, try sessions.xml
if (contextPath != null) {
return new DynamicJAXBContext(new SessionsXmlContextInput(contextPath, properties, classLoader));
} else {
throw new JAXBException(org.eclipse.persistence.exceptions.JAXBException.nullSessionName());
}
}
/**
* Unsupported Operation. DynamicJAXBConexts can not be created from concrete classes. Use the standard
* JAXBContext to create a context from existing Classes.
*
* @see org.eclipse.persistence.jaxb.JAXBContext
*/
public static DynamicJAXBContext createContext(Class[] classes, Map properties) throws JAXBException {
throw new JAXBException(org.eclipse.persistence.exceptions.JAXBException.cannotCreateDynamicContextFromClasses());
}
/**
* Create a DynamicJAXBContext, using XML Schema as the metadata source.
*
* @param schemaDOM
* org.w3c.dom.Node representing the XML Schema.
* @param resolver
* An org.xml.sax.EntityResolver, used to resolve schema imports. Can be null.
* @param classLoader
* The application's current class loader, which will be used to first lookup
* classes to see if they exist before new DynamicTypes are generated. Can be
* null, in which case Thread.currentThread().getContextClassLoader() will be used.
* @param properties
* Map of properties to use when creating a new DynamicJAXBContext. Can be null.
*
* @return
* A new instance of DynamicJAXBContext.
*
* @throws JAXBException
* if an error was encountered while creating the DynamicJAXBContext.
*/
public static DynamicJAXBContext createContextFromXSD(Node schemaDOM, EntityResolver resolver, ClassLoader classLoader, Map properties) throws JAXBException {
if (schemaDOM == null) {
throw new JAXBException(org.eclipse.persistence.exceptions.JAXBException.nullNode());
}
if (resolver != null) {
// If schema and resolver are both specified, this indicates a schema import
// This is not supported when boostrapping from a Node.
throw new JAXBException(org.eclipse.persistence.exceptions.JAXBException.xsdImportNotSource());
}
DynamicJAXBContext ctx = new DynamicJAXBContext(new SchemaContextInput(schemaDOM, null, properties, classLoader));
fixDateTimeConversion(ctx);
return ctx;
}
/**
* Create a DynamicJAXBContext, using XML Schema as the metadata source.
*
* @param schemaStream
* java.io.InputStream from which to read the XML Schema.
* @param resolver
* An org.xml.sax.EntityResolver, used to resolve schema imports. Can be null.
* @param classLoader
* The application's current class loader, which will be used to first lookup
* classes to see if they exist before new DynamicTypes are generated. Can be
* null, in which case Thread.currentThread().getContextClassLoader() will be used.
* @param properties
* Map of properties to use when creating a new DynamicJAXBContext. Can be null.
*
* @return
* A new instance of DynamicJAXBContext.
*
* @throws JAXBException
* if an error was encountered while creating the DynamicJAXBContext.
*/
public static DynamicJAXBContext createContextFromXSD(InputStream schemaStream, EntityResolver resolver, ClassLoader classLoader, Map properties) throws JAXBException {
if (schemaStream == null) {
throw new JAXBException(org.eclipse.persistence.exceptions.JAXBException.nullInputStream());
}
DynamicJAXBContext ctx = new DynamicJAXBContext(new SchemaContextInput(schemaStream, resolver, properties, classLoader));
fixDateTimeConversion(ctx);
return ctx;
}
/**
* Create a DynamicJAXBContext, using XML Schema as the metadata source.
*
* @param schemaSource
* javax.xml.transform.Source from which to read the XML Schema.
* @param resolver
* An org.xml.sax.EntityResolver, used to resolve schema imports. Can be null.
* @param classLoader
* The application's current class loader, which will be used to first lookup
* classes to see if they exist before new DynamicTypes are generated. Can be
* null, in which case Thread.currentThread().getContextClassLoader() will be used.
* @param properties
* Map of properties to use when creating a new DynamicJAXBContext. Can be null.
*
* @return
* A new instance of DynamicJAXBContext.
*
* @throws JAXBException
* if an error was encountered while creating the DynamicJAXBContext.
*/
public static DynamicJAXBContext createContextFromXSD(Source schemaSource, EntityResolver resolver, ClassLoader classLoader, Map properties) throws JAXBException {
if (schemaSource == null) {
throw new JAXBException(org.eclipse.persistence.exceptions.JAXBException.nullSource());
}
DynamicJAXBContext ctx = new DynamicJAXBContext(new SchemaContextInput(schemaSource, resolver, properties, classLoader));
fixDateTimeConversion(ctx);
return ctx;
}
/**
* Create a DynamicJAXBContext, using an EclipseLink OXM file as the metadata source.
*
* @param classLoader
* The application's current class loader, which will be used to first lookup
* classes to see if they exist before new DynamicTypes are generated. Can be
* null, in which case Thread.currentThread().getContextClassLoader() will be used.
* @param properties
* Map of properties to use when creating a new DynamicJAXBContext. This map must
* contain a key of JAXBContextProperties.OXM_METADATA_SOURCE, which can have several possible values:
*
*
* - One of the following, pointing to your OXM file:
java.io.File, java.io.InputStream, java.io.Reader, java.net.URL,
* javax.xml.stream.XMLEventReader, javax.xml.stream.XMLStreamReader, javax.xml.transform.Source,
* org.w3c.dom.Node, or org.xml.sax.InputSource.
* - A
List of objects from the set above.
* - A
Map<String, Object>, where String is a package name, and Object is the pointer to the OXM file, from the set
* of possibilities above. If using this option, a package-name element is not required in the xml-bindings
* element of your OXM file.
*
*
*
* @return
* A new instance of DynamicJAXBContext.
*
* @throws JAXBException
* if an error was encountered while creating the DynamicJAXBContext.
*/
public static DynamicJAXBContext createContextFromOXM(ClassLoader classLoader, Map properties) throws JAXBException {
if (properties == null || (properties.get(JAXBContextProperties.OXM_METADATA_SOURCE) == null && properties.get(JAXBContextFactory.ECLIPSELINK_OXM_XML_KEY) == null)) {
throw new JAXBException(org.eclipse.persistence.exceptions.JAXBException.oxmKeyNotFound());
}
return new DynamicJAXBContext(new MetadataContextInput(properties, classLoader));
}
/**
* Ensures that XSD dateTimes will always be unmarshalled as XMLGregorianCalendars, and never
* as GregorianCalendars. CALENDAR entries are removed from the default XMLConversionManager,
* and replaced with XML_GREGORIAN_CALENDAR.
*/
private static void fixDateTimeConversion(DynamicJAXBContext ctx) {
XMLConversionManager conversionManager = (XMLConversionManager) ctx.getXMLContext().getSession().getDatasourcePlatform().getConversionManager();
Map defaultXmlTypes = XMLConversionManager.getDefaultXMLTypes();
defaultXmlTypes.remove(Constants.DATE_TIME_QNAME);
defaultXmlTypes.put(Constants.DATE_TIME_QNAME, CoreClassConstants.XML_GREGORIAN_CALENDAR);
Map defaultJavaTypes = XMLConversionManager.getDefaultJavaTypes();
defaultJavaTypes.remove(CoreClassConstants.CALENDAR);
defaultJavaTypes.put(CoreClassConstants.XML_GREGORIAN_CALENDAR, Constants.DATE_TIME_QNAME);
}
}