org.springframework.oxm.xmlbeans.XmlBeansMarshaller Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of spring-oxm Show documentation
Show all versions of spring-oxm Show documentation
Spring Object/XML Mapping abstraction
package org.springframework.oxm.xmlbeans;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.xmlbeans.XmlError;
import org.apache.xmlbeans.XmlException;
import org.apache.xmlbeans.XmlObject;
import org.apache.xmlbeans.XmlOptions;
import org.apache.xmlbeans.XmlSaxHandler;
import org.apache.xmlbeans.XmlValidationError;
import org.springframework.oxm.AbstractMarshaller;
import org.springframework.oxm.XmlMappingException;
import org.springframework.xml.stream.StaxEventContentHandler;
import org.springframework.xml.stream.StaxEventXmlReader;
import org.springframework.xml.stream.StaxStreamContentHandler;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
import org.xml.sax.ext.LexicalHandler;
/**
* Implementation of the Marshaller interface for XMLBeans. Further options can be set by setting the
* xmlOptions property. A XmlOptionsFactoryBean is provided to easily wire up
* XmlObjects instances.
*
* Unmarshalled objects can be validated by setting the validating property, or by calling the
* validiate() method directly. Invalid objects will result in an XmlBeansValidationFailureException.
*
* Note that due to the nature of XMLBeans, this marshaller requires all passed objects to be of type
* XmlObject.
*
* @author Arjen Poutsma
* @see #setXmlOptions(org.apache.xmlbeans.XmlOptions)
* @see XmlOptionsFactoryBean
* @see #setValidating(boolean)
* @see org.apache.xmlbeans.XmlObject
*/
public class XmlBeansMarshaller extends AbstractMarshaller {
private XmlOptions xmlOptions;
/**
* Sets the XmlOptions.
*
* @param xmlOptions the xml options
*/
public void setXmlOptions(XmlOptions xmlOptions) {
this.xmlOptions = xmlOptions;
}
public boolean supports(Class clazz) {
return XmlObject.class.isAssignableFrom(clazz);
}
/**
* Converts the given XMLBeans exception to an appropriate exception from the org.springframework.oxm
* hierarchy.
*
* The default implementation delegates to XmlBeansUtils. Can be overridden in subclasses.
*
* A boolean flag is used to indicate whether this exception occurs during marshalling or unmarshalling, since
* XMLBeans itself does not make this distinction in its exception hierarchy.
*
* @param ex XMLBeans Exception that occured
* @param marshalling indicates whether the exception occurs during marshalling (true), or
* unmarshalling (false)
* @return the corresponding XmlMappingException
* @see XmlBeansUtils#convertXmlBeansException(Exception,boolean)
*/
public XmlMappingException convertXmlBeansException(Exception ex, boolean marshalling) {
return XmlBeansUtils.convertXmlBeansException(ex, marshalling);
}
protected void marshalDomNode(Object graph, Node node) throws XmlMappingException {
Document document = node.getNodeType() == Node.DOCUMENT_NODE ? (Document) node : node.getOwnerDocument();
Node xmlBeansNode = ((XmlObject) graph).newDomNode(xmlOptions);
NodeList xmlBeansChildNodes = xmlBeansNode.getChildNodes();
for (int i = 0; i < xmlBeansChildNodes.getLength(); i++) {
Node xmlBeansChildNode = xmlBeansChildNodes.item(i);
Node importedNode = document.importNode(xmlBeansChildNode, true);
node.appendChild(importedNode);
}
}
protected void marshalOutputStream(Object graph, OutputStream outputStream)
throws XmlMappingException, IOException {
((XmlObject) graph).save(outputStream, xmlOptions);
}
protected void marshalSaxHandlers(Object graph, ContentHandler contentHandler, LexicalHandler lexicalHandler)
throws XmlMappingException {
try {
((XmlObject) graph).save(contentHandler, lexicalHandler, xmlOptions);
}
catch (SAXException ex) {
throw convertXmlBeansException(ex, true);
}
}
protected void marshalWriter(Object graph, Writer writer) throws XmlMappingException, IOException {
((XmlObject) graph).save(writer, xmlOptions);
}
protected void marshalXmlEventWriter(Object graph, XMLEventWriter eventWriter) {
ContentHandler contentHandler = new StaxEventContentHandler(eventWriter);
marshalSaxHandlers(graph, contentHandler, null);
}
protected void marshalXmlStreamWriter(Object graph, XMLStreamWriter streamWriter) throws XmlMappingException {
ContentHandler contentHandler = new StaxStreamContentHandler(streamWriter);
marshalSaxHandlers(graph, contentHandler, null);
}
protected Object unmarshalDomNode(Node node) throws XmlMappingException {
try {
XmlObject object = XmlObject.Factory.parse(node, xmlOptions);
validate(object);
return object;
}
catch (XmlException ex) {
throw convertXmlBeansException(ex, false);
}
}
protected Object unmarshalInputStream(InputStream inputStream) throws XmlMappingException, IOException {
try {
XmlObject object = XmlObject.Factory.parse(inputStream, xmlOptions);
validate(object);
return object;
}
catch (XmlException ex) {
throw convertXmlBeansException(ex, false);
}
}
protected Object unmarshalReader(Reader reader) throws XmlMappingException, IOException {
try {
XmlObject object = XmlObject.Factory.parse(reader, xmlOptions);
validate(object);
return object;
}
catch (XmlException ex) {
throw convertXmlBeansException(ex, false);
}
}
protected Object unmarshalSaxReader(XMLReader xmlReader, InputSource inputSource)
throws XmlMappingException, IOException {
XmlSaxHandler saxHandler = XmlObject.Factory.newXmlSaxHandler(xmlOptions);
xmlReader.setContentHandler(saxHandler.getContentHandler());
try {
xmlReader.setProperty("http://xml.org/sax/properties/lexical-handler", saxHandler.getLexicalHandler());
}
catch (SAXNotRecognizedException e) {
// ignore
}
catch (SAXNotSupportedException e) {
// ignore
}
try {
xmlReader.parse(inputSource);
XmlObject object = saxHandler.getObject();
validate(object);
return object;
}
catch (SAXException ex) {
throw convertXmlBeansException(ex, false);
}
catch (XmlException ex) {
throw convertXmlBeansException(ex, false);
}
}
protected Object unmarshalXmlEventReader(XMLEventReader eventReader) throws XmlMappingException {
XMLReader reader = new StaxEventXmlReader(eventReader);
try {
return unmarshalSaxReader(reader, new InputSource());
}
catch (IOException ex) {
throw convertXmlBeansException(ex, false);
}
}
protected Object unmarshalXmlStreamReader(XMLStreamReader streamReader) throws XmlMappingException {
try {
XmlObject object = XmlObject.Factory.parse(streamReader, xmlOptions);
validate(object);
return object;
}
catch (XmlException ex) {
throw convertXmlBeansException(ex, false);
}
}
/**
* Validates the given XmlObject.
*
* @param object the xml object to validate
* @throws XmlBeansValidationFailureException
* if the given object is not valid
*/
public void validate(XmlObject object) throws XmlBeansValidationFailureException {
if (isValidating() && object != null) {
// create a temporary xmlOptions just for validation
XmlOptions validateOptions = xmlOptions != null ? xmlOptions : new XmlOptions();
List errorsList = new ArrayList();
validateOptions.setErrorListener(errorsList);
if (!object.validate(validateOptions)) {
StringBuffer buffer = new StringBuffer("Could not validate XmlObject :");
for (Iterator iterator = errorsList.iterator(); iterator.hasNext();) {
XmlError xmlError = (XmlError) iterator.next();
if (xmlError instanceof XmlValidationError) {
buffer.append(xmlError.toString());
}
}
XmlException ex = new XmlException(buffer.toString(), null, errorsList);
throw new XmlBeansValidationFailureException(ex);
}
}
}
}