/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.xquery.saxon;
import java.io.IOException;
import java.util.Map;
import net.sf.saxon.Configuration;
import net.sf.saxon.event.ContentHandlerProxy;
import net.sf.saxon.event.FilterFactory;
import net.sf.saxon.event.ProxyReceiver;
import net.sf.saxon.event.Receiver;
import net.sf.saxon.lib.AugmentedSource;
import net.sf.saxon.om.Name11Checker;
import net.sf.saxon.om.NamespaceBinding;
import net.sf.saxon.om.NodeName;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.SchemaType;
import net.sf.saxon.type.SimpleType;
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.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
import org.xml.sax.ext.LexicalHandler;
final class StreamingUtils {
/**
* Pre-parser that adds validation and handles a default name space
*
* TODO: add support for more general paths including node tests
* this could be done as a secondary expression applied to the
* context item
*
* @param locationPath
* @param prefixMap
* @return
*/
public static String getStreamingPath(String locationPath, Map<String, String> prefixMap) {
if (locationPath.indexOf("//") >= 0) //$NON-NLS-1$
throw new IllegalArgumentException("DESCENDANT axis is not supported"); //$NON-NLS-1$
String path = locationPath.trim();
if (path.startsWith("/")) path = path.substring(1); //$NON-NLS-1$
if (path.endsWith("/")) path = path.substring(0, path.length() - 1); //$NON-NLS-1$
path = path.trim();
String[] localNames = path.split("/"); //$NON-NLS-1$
if (localNames.length == 1) {
throw new IllegalArgumentException(locationPath + " refers to only the root element"); //$NON-NLS-1$
}
String fixedPath = ""; //$NON-NLS-1$
// parse prefix:localName pairs and resolve prefixes to namespaceURIs
for (int i = 0; i < localNames.length; i++) {
fixedPath += "/"; //$NON-NLS-1$
int k = localNames[i].indexOf(':');
if (k >= 0 && localNames[i].indexOf(':', k+1) >= 0)
throw new IllegalArgumentException(
"QName must not contain more than one colon: " //$NON-NLS-1$
+ "qname='" + localNames[i] + "', path='" + path + "'"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
if (k <= 0) {
fixedPath += SaxonXQueryExpression.DEFAULT_PREFIX+":"; //$NON-NLS-1$
} else {
String prefix = localNames[i].substring(0, k).trim();
if (k >= localNames[i].length() - 1)
throw new IllegalArgumentException(
"Missing localName for prefix: " + "prefix='" //$NON-NLS-1$ //$NON-NLS-2$
+ prefix + "', path='" + path + "', prefixes=" + prefixMap); //$NON-NLS-1$ //$NON-NLS-2$
fixedPath += prefix + ":"; //$NON-NLS-1$
} // end if
localNames[i] = localNames[i].substring(k + 1).trim();
if (!localNames[i].equals("*") && !Name11Checker.getInstance().isValidNCName(localNames[i])) { //$NON-NLS-1$
throw new IllegalArgumentException(localNames[i] + " is not a valid local name."); //$NON-NLS-1$
}
fixedPath += localNames[i];
}
return fixedPath;
}
}
/**
* An {@link XMLReader} designed to bridge between the Saxon document projection logic and the XOM/NUX streaming logic.
*/
final class SaxonReader implements XMLReader {
private ContentHandler handler;
private LexicalHandler lexicalHandler;
private Configuration config;
private AugmentedSource source;
public SaxonReader(Configuration config, AugmentedSource source) {
this.config = config;
this.source = source;
}
@Override
public void setProperty(String name, Object value)
throws SAXNotRecognizedException, SAXNotSupportedException {
if ("http://xml.org/sax/properties/lexical-handler".equals(name)) { //$NON-NLS-1$
this.lexicalHandler = (LexicalHandler) value;
}
}
@Override
public void setFeature(String name, boolean value)
throws SAXNotRecognizedException, SAXNotSupportedException {
}
@Override
public void setErrorHandler(ErrorHandler handler) {
throw new UnsupportedOperationException();
}
@Override
public void setEntityResolver(EntityResolver resolver) {
throw new UnsupportedOperationException();
}
@Override
public void setDTDHandler(DTDHandler handler) {
}
@Override
public void setContentHandler(ContentHandler handler) {
this.handler = handler;
}
@Override
public void parse(String systemId) throws IOException, SAXException {
throw new UnsupportedOperationException();
}
@Override
public void parse(InputSource input) throws IOException, SAXException {
final ContentHandlerProxy chp = new ContentHandlerProxy();
chp.setLexicalHandler(lexicalHandler);
chp.setUnderlyingContentHandler(handler);
this.source.addFilter(new FilterFactory() {
@Override
public ProxyReceiver makeFilter(Receiver arg0) {
return new ContentHandlerProxyReceiver(chp, arg0);
}
});
}
@Override
public Object getProperty(String name) throws SAXNotRecognizedException,
SAXNotSupportedException {
throw new UnsupportedOperationException();
}
@Override
public boolean getFeature(String name) throws SAXNotRecognizedException,
SAXNotSupportedException {
throw new UnsupportedOperationException();
}
@Override
public ErrorHandler getErrorHandler() {
return null;
}
@Override
public EntityResolver getEntityResolver() {
throw new UnsupportedOperationException();
}
@Override
public DTDHandler getDTDHandler() {
throw new UnsupportedOperationException();
}
@Override
public ContentHandler getContentHandler() {
return this.handler;
}
}
/**
* Adapts the {@link ContentHandlerProxy} to be a {@link ProxyReceiver}
*/
final class ContentHandlerProxyReceiver extends ProxyReceiver {
private Receiver reciever;
public ContentHandlerProxyReceiver(Receiver receiver, Receiver next) {
super(next);
this.reciever = receiver;
this.reciever.setPipelineConfiguration(next.getPipelineConfiguration());
}
@Override
public void attribute(NodeName nameCode, SimpleType typeCode,
CharSequence value, int locationId, int properties)
throws XPathException {
reciever.attribute(nameCode, typeCode, value, locationId, properties);
}
public void characters(CharSequence chars, int locationId,
int properties) throws XPathException {
reciever.characters(chars, locationId, properties);
}
public void close() throws XPathException {
reciever.close();
super.close();
}
public void comment(CharSequence content, int locationId, int properties)
throws XPathException {
reciever.comment(content, locationId, properties);
}
public void endDocument() throws XPathException {
reciever.endDocument();
super.endDocument() ;
}
public void endElement() throws XPathException {
reciever.endElement();
}
public String getSystemId() {
return reciever.getSystemId();
}
@Override
public void namespace(NamespaceBinding namespaceBinding, int properties)
throws XPathException {
reciever.namespace(namespaceBinding, properties);
}
public void open() throws XPathException {
super.open();
reciever.open();
}
public void processingInstruction(String name, CharSequence data,
int locationId, int properties) throws XPathException {
reciever.processingInstruction(name, data, locationId, properties);
}
public void setSystemId(String systemId) {
reciever.setSystemId(systemId);
super.setSystemId(systemId);
}
public void setUnparsedEntity(String name, String systemID,
String publicID) throws XPathException {
reciever.setUnparsedEntity(name, systemID, publicID);
}
public void startContent() throws XPathException {
reciever.startContent();
}
public void startDocument(int properties) throws XPathException {
super.startDocument(properties);
reciever.startDocument(properties);
}
@Override
public void startElement(NodeName elemName, SchemaType typeCode,
int locationId, int properties) throws XPathException {
reciever.startElement(elemName, typeCode, locationId, properties);
}
}