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package com.sun.tools.xjc.reader.xmlschema.parser;
import java.io.File;
import java.io.IOException;
import javax.xml.transform.Source;
import javax.xml.transform.sax.SAXSource;
import javax.xml.validation.SchemaFactory;
import com.sun.tools.xjc.ConsoleErrorReporter;
import com.sun.tools.xjc.ErrorReceiver;
import com.sun.tools.xjc.util.ErrorReceiverFilter;
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSResourceResolver;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import static javax.xml.XMLConstants.W3C_XML_SCHEMA_NS_URI;
/**
* Checks XML Schema XML representation constraints and
* schema component constraints by using JAXP 1.3 validation framework.
* <p/>
*
* @author Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
* @author Ryan Shoemaker (ryan.shoemaker@sun.com)
*/
public class SchemaConstraintChecker {
/**
* @param schemas Schema files to be checked.
* @param errorHandler detected errors will be reported to this handler.
* @return true if there was no error, false if there were errors.
*/
public static boolean check(InputSource[] schemas,
ErrorReceiver errorHandler, final EntityResolver entityResolver) {
ErrorReceiverFilter errorFilter = new ErrorReceiverFilter(errorHandler);
boolean hadErrors = false;
SchemaFactory sf = SchemaFactory.newInstance(W3C_XML_SCHEMA_NS_URI);
sf.setErrorHandler(errorFilter);
if( entityResolver != null ) {
sf.setResourceResolver(new LSResourceResolver() {
public LSInput resolveResource(String type, String namespaceURI, String publicId, String systemId, String baseURI) {
try {
// XSOM passes the namespace URI to the publicID parameter.
// we do the same here .
InputSource is = entityResolver.resolveEntity(namespaceURI, systemId);
if(is==null) return null;
return new LSInputSAXWrapper(is);
} catch (SAXException e) {
// TODO: is this sufficient?
return null;
} catch (IOException e) {
// TODO: is this sufficient?
return null;
}
}
});
}
try {
sf.newSchema(getSchemaSource(schemas));
} catch (SAXException e) {
// TODO: we haven't thrown exceptions from here before. should we just trap them and return false?
hadErrors = true;
} catch( OutOfMemoryError e) {
errorHandler.warning(null,Messages.format(Messages.WARN_UNABLE_TO_CHECK_CORRECTNESS));
}
return !(hadErrors || errorFilter.hadError());
}
/**
* convert an array of {@link InputSource InputSource} into an
* array of {@link Source Source}
*
* @param schemas array of {@link InputSource InputSource}
* @return array of {@link Source Source}
*/
private static Source[] getSchemaSource(InputSource[] schemas) {
SAXSource[] sources = new SAXSource[schemas.length];
for (int i = 0; i < schemas.length; i++)
sources[i] = new SAXSource(schemas[i]);
return sources;
}
// quick test
public static void main(String[] args) throws IOException {
InputSource[] sources = new InputSource[args.length];
for (int i = 0; i < args.length; i++)
sources[i] = new InputSource(new File(args[i]).toURL().toExternalForm());
check(sources, new ConsoleErrorReporter(), null);
}
}