org.docx4j.openpackaging.parts.SAXHandler Maven / Gradle / Ivy
package org.docx4j.openpackaging.parts;
import java.io.ByteArrayOutputStream;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.DTDHandler;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
/**
* Following http://stackoverflow.com/a/2240367/1031689
* courtesy of http://stackoverflow.com/users/270610/chris-pacejo
*
*/
public class SAXHandler implements ContentHandler {
protected static Logger log = LoggerFactory.getLogger(SAXHandler.class);
static final private TransformerFactory tf = TransformerFactory.newInstance();
private ContentHandler ch;
private ByteArrayOutputStream os;
public ByteArrayOutputStream getOutputStream() {
return os;
}
public SAXHandler() throws SAXException {
try {
final Transformer t = tf.newTransformer();
os = new ByteArrayOutputStream();
log.info("Using transformer: " + t.getClass().getName());
// org.apache.xalan.transformer.TransformerIdentityImpl works
t.transform(new SAXSource(
new XMLReader() {
public ContentHandler getContentHandler() { return ch; }
public DTDHandler getDTDHandler() { return null; }
public EntityResolver getEntityResolver() { return null; }
public ErrorHandler getErrorHandler() { return null; }
public boolean getFeature(String name) { return false; }
public Object getProperty(String name) { return null; }
public void parse(InputSource input) { }
public void parse(String systemId) { }
public void setContentHandler(ContentHandler handler) { ch = handler; }
public void setDTDHandler(DTDHandler handler) { }
public void setEntityResolver(EntityResolver resolver) { }
public void setErrorHandler(ErrorHandler handler) { }
public void setFeature(String name, boolean value) { }
public void setProperty(String name, Object value) { }
}, new InputSource()),
new StreamResult(os));
}
catch (TransformerException e) {
throw new SAXException(e);
}
if (ch == null)
throw new SAXException("Transformer didn't set ContentHandler");
}
public void setDocumentLocator(Locator locator) {
ch.setDocumentLocator(locator);
}
public void startDocument() throws SAXException {
ch.startDocument();
}
public void endDocument() throws SAXException {
ch.endDocument();
}
public void startPrefixMapping(String prefix, String uri) throws SAXException {
ch.startPrefixMapping(prefix, uri);
}
public void endPrefixMapping(String prefix) throws SAXException {
ch.endPrefixMapping(prefix);
}
public void startElement(String uri, String localName, String qName, Attributes atts)
throws SAXException {
ch.startElement(uri, localName, qName, atts);
}
public void endElement(String uri, String localName, String qName)
throws SAXException {
ch.endElement(uri, localName, qName);
}
/* You'll probably want to override this.
*
* (non-Javadoc)
* @see org.xml.sax.ContentHandler#characters(char[], int, int)
*/
public void characters(char[] ch, int start, int length)
throws SAXException {
this.ch.characters(ch, start, length);
}
public void ignorableWhitespace(char[] ch, int start, int length)
throws SAXException {
this.ch.ignorableWhitespace(ch, start, length);
}
public void processingInstruction(String target, String data)
throws SAXException {
ch.processingInstruction(target, data);
}
public void skippedEntity(String name) throws SAXException {
ch.skippedEntity(name);
}
public ContentHandler getContentHandler() {
return ch;
}
}