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package com.sun.xml.bind.v2.runtime.unmarshaller;
import javax.xml.namespace.NamespaceContext;
import javax.xml.validation.Schema;
import javax.xml.validation.ValidatorHandler;
import com.sun.xml.bind.v2.util.FatalAdapter;
import org.xml.sax.SAXException;
/**
* {@link XmlVisitor} decorator that validates the events by using JAXP validation API.
*
* @author Kohsuke Kawaguchi
*/
final class ValidatingUnmarshaller implements XmlVisitor, XmlVisitor.TextPredictor {
private final XmlVisitor next;
private final ValidatorHandler validator;
private NamespaceContext nsContext = null;
/**
* {@link TextPredictor} of the next {@link XmlVisitor}.
*/
private final TextPredictor predictor;
private char[] buf = new char[256];
/**
* Creates a new instance of ValidatingUnmarshaller.
*/
public ValidatingUnmarshaller( Schema schema, XmlVisitor next ) {
this.validator = schema.newValidatorHandler();
this.next = next;
this.predictor = next.getPredictor();
// if the user bothers to use a validator, make validation errors fatal
// so that it will abort unmarshalling.
validator.setErrorHandler(new FatalAdapter(getContext()));
}
public void startDocument(LocatorEx locator, NamespaceContext nsContext) throws SAXException {
this.nsContext = nsContext;
validator.setDocumentLocator(locator);
validator.startDocument();
next.startDocument(locator,nsContext);
}
public void endDocument() throws SAXException {
this.nsContext = null;
validator.endDocument();
next.endDocument();
}
public void startElement(TagName tagName) throws SAXException {
if(nsContext != null) {
String tagNamePrefix = tagName.getPrefix().intern();
if(tagNamePrefix != "") {
validator.startPrefixMapping(tagNamePrefix, nsContext.getNamespaceURI(tagNamePrefix));
}
}
validator.startElement(tagName.uri,tagName.local,tagName.getQname(),tagName.atts);
next.startElement(tagName);
}
public void endElement(TagName tagName ) throws SAXException {
validator.endElement(tagName.uri,tagName.local,tagName.getQname());
next.endElement(tagName);
}
public void startPrefixMapping(String prefix, String nsUri) throws SAXException {
validator.startPrefixMapping(prefix,nsUri);
next.startPrefixMapping(prefix,nsUri);
}
public void endPrefixMapping(String prefix) throws SAXException {
validator.endPrefixMapping(prefix);
next.endPrefixMapping(prefix);
}
public void text( CharSequence pcdata ) throws SAXException {
int len = pcdata.length();
if(buf.length<len) {
buf = new char[len];
}
for( int i=0;i<len; i++ )
buf[i] = pcdata.charAt(i); // isn't this kinda slow?
validator.characters(buf,0,len);
if(predictor.expectText())
next.text(pcdata);
}
public UnmarshallingContext getContext() {
return next.getContext();
}
public TextPredictor getPredictor() {
return this;
}
// should be always invoked through TextPredictor
@Deprecated
public boolean expectText() {
// validator needs to make sure that there's no text
// even when it's not expected. So always have them
// send text, ignoring optimization hints from the unmarshaller
return true;
}
}