com.sun.xml.xsom.util.DomAnnotationParserFactory Maven / Gradle / Ivy
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package com.sun.xml.xsom.util;
import com.sun.xml.xsom.XSAnnotation;
import com.sun.xml.xsom.parser.AnnotationContext;
import com.sun.xml.xsom.parser.AnnotationParser;
import com.sun.xml.xsom.parser.AnnotationParserFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.ContentHandler;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
/**
* {@link AnnotationParserFactory} that parses annotations into a W3C DOM.
*
*
* If you use this parser factory, you'll get {@link Element} that represents
* <xs:annotation> from {@link XSAnnotation#getAnnotation()}.
*
*
* When multiple <xs:annotation>s are found for the given schema component,
* you'll see all <xs:appinfo>s and <xs:documentation>s combined under
* one <xs:annotation> element.
*
* @author Kohsuke Kawaguchi
*/
public class DomAnnotationParserFactory implements AnnotationParserFactory {
public AnnotationParser create() {
return new AnnotationParserImpl();
}
private static final SAXTransformerFactory stf = (SAXTransformerFactory) SAXTransformerFactory.newInstance();
private static class AnnotationParserImpl extends AnnotationParser {
/**
* Identity transformer used to parse SAX into DOM.
*/
private final TransformerHandler transformer;
private DOMResult result;
AnnotationParserImpl() {
try {
transformer = stf.newTransformerHandler();
} catch (TransformerConfigurationException e) {
throw new Error(e); // impossible
}
}
public ContentHandler getContentHandler(AnnotationContext context, String parentElementName, ErrorHandler errorHandler, EntityResolver entityResolver) {
result = new DOMResult();
transformer.setResult(result);
return transformer;
}
public Object getResult(Object existing) {
Document dom = (Document)result.getNode();
Element e = dom.getDocumentElement();
if(existing instanceof Element) {
// merge all the children
Element prev = (Element) existing;
Node anchor = e.getFirstChild();
while(prev.getFirstChild()!=null) {
Node move = prev.getFirstChild();
e.insertBefore(e.getOwnerDocument().adoptNode(move), anchor );
}
}
return e;
}
}
}