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/**
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203
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jones
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* '$RCSfile$'
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* Purpose: A Class that transforms an XML text document
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* into a another type using XSL
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Matt Jones
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349
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jones
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* Release: @release@
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87
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jones
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*
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203
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jones
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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669
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jones
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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87
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jones
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*/
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package edu.ucsb.nceas.metacat;
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import java.io.*;
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import java.net.URL;
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import java.net.MalformedURLException;
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import java.sql.*;
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import java.util.Stack;
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906
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berkley
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import javax.xml.transform.TransformerFactory;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.stream.StreamSource;
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import javax.xml.transform.stream.StreamResult;
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import javax.xml.transform.TransformerException;
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import javax.xml.transform.TransformerConfigurationException;
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import org.apache.xerces.parsers.DOMParser;
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import org.w3c.dom.Attr;
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import org.w3c.dom.NamedNodeMap;
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import org.w3c.dom.NodeList;
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import org.w3c.dom.Document;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import org.w3c.dom.DocumentType;
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import org.xml.sax.SAXException;
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import org.xml.sax.InputSource;
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import org.apache.xerces.dom.DocumentTypeImpl;
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import org.apache.xpath.XPathAPI;
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import org.w3c.dom.NamedNodeMap;
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/*
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87
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jones
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import oracle.xml.parser.v2.XSLStylesheet;
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import oracle.xml.parser.v2.XSLException;
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832
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jones
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import oracle.xml.parser.v2.XMLParseException;
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87
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import oracle.xml.parser.v2.XSLProcessor;
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import oracle.xml.parser.v2.XMLDocument;
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import oracle.xml.parser.v2.DOMParser;
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906
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berkley
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*/
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832
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jones
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import org.w3c.dom.Document;
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import org.w3c.dom.Node;
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import org.w3c.dom.Element;
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import org.xml.sax.SAXException;
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87
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/**
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* A Class that transforms XML documents utitlizing XSL style sheets
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*/
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public class DBTransform {
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private Connection conn = null;
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private MetaCatUtil util = null;
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private String configDir = null;
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private String defaultStyle = null;
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87
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/**
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* construct a DBTransform instance.
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*
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* Generally, one calls transformXMLDocument() after constructing the instance
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*
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* @param conn the database connection from which to lookup the public ids
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*/
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public DBTransform( Connection conn )
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throws IOException,
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SQLException,
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ClassNotFoundException
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{
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this.conn = conn;
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util = new MetaCatUtil();
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configDir = util.getOption("config-dir");
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defaultStyle = util.getOption("default-style");
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}
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/**
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* Transform an XML document using the stylesheet reference from the db
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*
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* @param doc the document to be transformed
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* @param sourcetype the document type of the source
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* @param targettype the target document type
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832
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jones
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* @param qformat the name of the style set to use
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* @param pw the PrintWriter to which output is printed
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jones
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*/
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941
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tao
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public void transformXMLDocument(String doc, String sourceType,
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String targetType, String qformat, PrintWriter pw) {
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jones
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jones
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// Look up the stylesheet for this type combination
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941
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tao
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String xslSystemId = getStyleSystemId(qformat, sourceType, targetType);
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87
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jones
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941
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tao
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if (xslSystemId != null) {
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jones
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// Create a stylesheet from the system id that was found
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try {
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906
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berkley
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TransformerFactory tFactory = TransformerFactory.newInstance();
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Transformer transformer = tFactory.newTransformer(
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941
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tao
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new StreamSource(xslSystemId));
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transformer.setParameter("qformat", qformat);
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906
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berkley
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transformer.transform(new StreamSource(new StringReader(doc)),
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new StreamResult(pw));
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87
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jones
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} catch (Exception e) {
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941
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tao
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pw.println(xslSystemId + "Error transforming document in " +
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675
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berkley
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"DBTransform.transformXMLDocument: " +
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e.getMessage());
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941
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tao
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87
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}
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} else {
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// No stylesheet registered form this document type, so just return the
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// XML stream we were passed
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100
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jones
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pw.print(doc);
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jones
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}
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}
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906
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berkley
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941
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tao
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/**
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* Transform an XML document to StringWriter using the stylesheet reference
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* from the db
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* @param doc the document to be transformed
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* @param sourceType the document type of the source
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* @param targetType the target document type
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* @param qFormat the name of the style set to use
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* @param pw the StringWriter to which output will be stored
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*/
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public void transformXMLDocument(String doc, String sourceType,
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String targetType, String qFormat, StringWriter pw) {
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// Look up the stylesheet for this type combination
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String xslSystemId = getStyleSystemId(qFormat, sourceType, targetType);
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if (xslSystemId != null) {
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// Create a stylesheet from the system id that was found
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try {
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TransformerFactory tFactory = TransformerFactory.newInstance();
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Transformer transformer = tFactory.newTransformer(
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new StreamSource(xslSystemId));
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transformer.setParameter("qFormat", qFormat);
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transformer.transform(new StreamSource(new StringReader(doc)),
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new StreamResult(pw));
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} catch (Exception e) {
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util.debugMessage(xslSystemId + "Error transforming document in " +
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"DBTransform.transformXMLDocument: " +
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e.getMessage());
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165 |
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}
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166 |
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} else {
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// No stylesheet registered form this document type, so just return the
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// XML stream we were passed
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950
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tao
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pw.write(doc);
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941
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tao
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}
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}
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906
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berkley
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173 |
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/**
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174 |
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* gets the content of a tag in a given xml file with the given path
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175 |
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* @param f the file to parse
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176 |
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* @param path the path to get the content from
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177 |
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*/
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178 |
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public static NodeList getPathContent(File f, String path)
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{
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180 |
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if(f == null)
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181 |
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{
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182 |
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return null;
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183 |
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}
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184 |
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185 |
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DOMParser parser = new DOMParser();
|
186 |
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InputSource in;
|
187 |
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FileInputStream fs;
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188 |
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189 |
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try
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190 |
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{
|
191 |
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fs = new FileInputStream(f);
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192 |
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in = new InputSource(fs);
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193 |
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}
|
194 |
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catch(FileNotFoundException fnf)
|
195 |
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{
|
196 |
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fnf.printStackTrace();
|
197 |
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return null;
|
198 |
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}
|
199 |
|
|
|
200 |
|
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try
|
201 |
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{
|
202 |
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parser.parse(in);
|
203 |
|
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fs.close();
|
204 |
|
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}
|
205 |
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catch(Exception e1)
|
206 |
|
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{
|
207 |
|
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System.err.println("File: " + f.getPath() + " : parse threw: " +
|
208 |
|
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e1.toString());
|
209 |
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return null;
|
210 |
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}
|
211 |
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|
212 |
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Document doc = parser.getDocument();
|
213 |
|
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|
214 |
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try
|
215 |
|
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{
|
216 |
|
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NodeList docNodeList = XPathAPI.selectNodeList(doc, path);
|
217 |
|
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return docNodeList;
|
218 |
|
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}
|
219 |
|
|
catch(Exception se)
|
220 |
|
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{
|
221 |
|
|
System.err.println("file: " + f.getPath() + " : parse threw: " +
|
222 |
|
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se.toString());
|
223 |
|
|
return null;
|
224 |
|
|
}
|
225 |
|
|
}
|
226 |
87
|
jones
|
|
227 |
|
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/**
|
228 |
|
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* Lookup a stylesheet reference from the db catalog
|
229 |
|
|
*
|
230 |
832
|
jones
|
* @param qformat the named style-set format
|
231 |
|
|
* @param sourcetype the document type of the source
|
232 |
|
|
* @param targettype the document type of the target
|
233 |
|
|
*/
|
234 |
|
|
public String getStyleSystemId(String qformat, String sourcetype,
|
235 |
|
|
String targettype) {
|
236 |
|
|
String systemId = null;
|
237 |
|
|
|
238 |
|
|
if ((qformat == null) || (qformat.equals("html"))) {
|
239 |
|
|
qformat = defaultStyle;
|
240 |
|
|
}
|
241 |
|
|
|
242 |
|
|
// Load the style-set map for this qformat into a DOM
|
243 |
|
|
try {
|
244 |
906
|
berkley
|
boolean breakflag = false;
|
245 |
832
|
jones
|
String filename = configDir + "/" + qformat + ".xml";
|
246 |
|
|
util.debugMessage("Trying style-set file: " + filename);
|
247 |
906
|
berkley
|
File f = new File(filename);
|
248 |
|
|
NodeList nlDoctype = getPathContent(f, "/style-set/doctype");
|
249 |
|
|
NodeList nlDefault = getPathContent(f, "/style-set/default-style");
|
250 |
|
|
Node nDefault = nlDefault.item(0);
|
251 |
|
|
systemId = nDefault.getFirstChild().getNodeValue(); //set the default
|
252 |
832
|
jones
|
|
253 |
906
|
berkley
|
for(int i=0; i<nlDoctype.getLength(); i++)
|
254 |
|
|
{ //look for the right sourcetype
|
255 |
|
|
Node nDoctype = nlDoctype.item(i);
|
256 |
|
|
NamedNodeMap atts = nDoctype.getAttributes();
|
257 |
|
|
Node nAtt = atts.getNamedItem("publicid");
|
258 |
|
|
String doctype = nAtt.getFirstChild().getNodeValue();
|
259 |
|
|
if(doctype.equals(sourcetype))
|
260 |
|
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{ //found the right sourcetype now we need to get the target type
|
261 |
|
|
NodeList nlChildren = nDoctype.getChildNodes();
|
262 |
|
|
for(int j=0; j<nlChildren.getLength(); j++)
|
263 |
|
|
{
|
264 |
|
|
Node nChild = nlChildren.item(j);
|
265 |
|
|
String childName = nChild.getNodeName();
|
266 |
|
|
if(childName.equals("target"))
|
267 |
|
|
{
|
268 |
|
|
NamedNodeMap childAtts = nChild.getAttributes();
|
269 |
|
|
Node nTargetPublicId = childAtts.getNamedItem("publicid");
|
270 |
|
|
String target = nTargetPublicId.getFirstChild().getNodeValue();
|
271 |
|
|
if(target.equals(targettype))
|
272 |
|
|
{ //we found the right target type
|
273 |
|
|
NodeList nlTarget = nChild.getChildNodes();
|
274 |
|
|
for(int k=0; k<nlTarget.getLength(); k++)
|
275 |
|
|
{
|
276 |
|
|
Node nChildText = nlTarget.item(k);
|
277 |
|
|
if(nChildText.getNodeType() == Node.TEXT_NODE)
|
278 |
|
|
{ //get the text from the target node
|
279 |
|
|
systemId = nChildText.getNodeValue();
|
280 |
|
|
breakflag = true;
|
281 |
|
|
break;
|
282 |
|
|
}
|
283 |
|
|
}
|
284 |
832
|
jones
|
}
|
285 |
|
|
}
|
286 |
906
|
berkley
|
|
287 |
|
|
if(breakflag)
|
288 |
|
|
{
|
289 |
|
|
break;
|
290 |
|
|
}
|
291 |
832
|
jones
|
}
|
292 |
|
|
}
|
293 |
906
|
berkley
|
|
294 |
|
|
if(breakflag)
|
295 |
|
|
{
|
296 |
|
|
break;
|
297 |
|
|
}
|
298 |
832
|
jones
|
}
|
299 |
|
|
}
|
300 |
906
|
berkley
|
catch(Exception e)
|
301 |
|
|
{
|
302 |
|
|
System.out.println("Error parsing style-set file: " + e.getMessage());
|
303 |
|
|
e.printStackTrace();
|
304 |
|
|
}
|
305 |
832
|
jones
|
|
306 |
|
|
// Return the system ID for this particular source document type
|
307 |
|
|
return systemId;
|
308 |
|
|
}
|
309 |
|
|
|
310 |
|
|
/**
|
311 |
|
|
* Lookup a stylesheet reference from the db catalog
|
312 |
|
|
*
|
313 |
87
|
jones
|
* @param objecttype the type of the object we want to retrieve
|
314 |
|
|
* @param sourcetype the document type of the source
|
315 |
|
|
* @param targettype the document type of the target
|
316 |
|
|
*/
|
317 |
|
|
public String getSystemId(String objecttype, String sourcetype,
|
318 |
|
|
String targettype) {
|
319 |
|
|
|
320 |
|
|
// Look up the System ID of a particular object
|
321 |
|
|
PreparedStatement pstmt;
|
322 |
|
|
String the_system_id = null;
|
323 |
|
|
try {
|
324 |
|
|
pstmt =
|
325 |
|
|
conn.prepareStatement("SELECT system_id " +
|
326 |
94
|
jones
|
"FROM xml_catalog " +
|
327 |
764
|
bojilova
|
"WHERE entry_type = ? " +
|
328 |
|
|
"AND source_doctype = ? " +
|
329 |
|
|
"AND target_doctype = ? ");
|
330 |
87
|
jones
|
// Bind the values to the query
|
331 |
94
|
jones
|
pstmt.setString(1, objecttype);
|
332 |
|
|
pstmt.setString(2, sourcetype);
|
333 |
|
|
pstmt.setString(3, targettype);
|
334 |
87
|
jones
|
pstmt.execute();
|
335 |
|
|
try {
|
336 |
|
|
ResultSet rs = pstmt.getResultSet();
|
337 |
|
|
try {
|
338 |
|
|
boolean tableHasRows = rs.next();
|
339 |
|
|
if (tableHasRows) {
|
340 |
|
|
try {
|
341 |
|
|
the_system_id = rs.getString(1);
|
342 |
|
|
} catch (SQLException e) {
|
343 |
675
|
berkley
|
System.out.println("Error with getString in " +
|
344 |
|
|
"DBTransform.getSystemId: " + e.getMessage());
|
345 |
|
|
}
|
346 |
87
|
jones
|
} else {
|
347 |
|
|
the_system_id = null;
|
348 |
|
|
}
|
349 |
|
|
} catch (SQLException e) {
|
350 |
675
|
berkley
|
System.err.println("Error with next in DBTransform.getSystemId: " +
|
351 |
|
|
e.getMessage());
|
352 |
87
|
jones
|
return ("Error with next: " + e.getMessage());
|
353 |
|
|
}
|
354 |
|
|
} catch (SQLException e) {
|
355 |
675
|
berkley
|
System.err.println("Error with getrset in DBTransform.getSystemId: " +
|
356 |
|
|
e.getMessage());
|
357 |
87
|
jones
|
return ("Error with getrset: " + e.getMessage());
|
358 |
|
|
}
|
359 |
|
|
pstmt.close();
|
360 |
|
|
} catch (SQLException e) {
|
361 |
675
|
berkley
|
System.err.println("Error getting id in DBTransform.getSystemId: " +
|
362 |
|
|
e.getMessage());
|
363 |
|
|
return ("Error getting id in DBTransform.getSystemId:: " +
|
364 |
|
|
e.getMessage());
|
365 |
87
|
jones
|
}
|
366 |
|
|
return the_system_id;
|
367 |
|
|
}
|
368 |
99
|
jones
|
|
369 |
|
|
/**
|
370 |
|
|
* the main routine used to test the transform utility.
|
371 |
|
|
*
|
372 |
184
|
jones
|
* Usage: java DBTransform
|
373 |
99
|
jones
|
*/
|
374 |
|
|
static public void main(String[] args) {
|
375 |
|
|
|
376 |
184
|
jones
|
if (args.length > 0)
|
377 |
99
|
jones
|
{
|
378 |
|
|
System.err.println("Wrong number of arguments!!!");
|
379 |
184
|
jones
|
System.err.println("USAGE: java DBTransform");
|
380 |
99
|
jones
|
return;
|
381 |
|
|
} else {
|
382 |
|
|
try {
|
383 |
|
|
|
384 |
|
|
// Open a connection to the database
|
385 |
184
|
jones
|
MetaCatUtil util = new MetaCatUtil();
|
386 |
|
|
Connection dbconn = util.openDBConnection();
|
387 |
99
|
jones
|
|
388 |
|
|
// Create a test document
|
389 |
|
|
StringBuffer testdoc = new StringBuffer();
|
390 |
|
|
testdoc.append("<?xml version=\"1.0\"?>");
|
391 |
|
|
testdoc.append("<eml-dataset><metafile_id>NCEAS-0001</metafile_id>");
|
392 |
|
|
testdoc.append("<dataset_id>DS001</dataset_id>");
|
393 |
|
|
testdoc.append("<title>My test doc</title></eml-dataset>");
|
394 |
|
|
|
395 |
|
|
// Transform the document to the new doctype
|
396 |
|
|
DBTransform dbt = new DBTransform(dbconn);
|
397 |
|
|
dbt.transformXMLDocument(testdoc.toString(),
|
398 |
|
|
"-//NCEAS//eml-dataset//EN",
|
399 |
|
|
"-//W3C//HTML//EN",
|
400 |
832
|
jones
|
"knb",
|
401 |
99
|
jones
|
new PrintWriter(System.out));
|
402 |
|
|
|
403 |
|
|
} catch (Exception e) {
|
404 |
|
|
System.err.println("EXCEPTION HANDLING REQUIRED");
|
405 |
|
|
System.err.println(e.getMessage());
|
406 |
|
|
e.printStackTrace(System.err);
|
407 |
|
|
}
|
408 |
|
|
}
|
409 |
|
|
}
|
410 |
|
|
|
411 |
184
|
jones
|
private void dbg(int position) {
|
412 |
99
|
jones
|
System.err.println("Debug flag: " + position);
|
413 |
|
|
}
|
414 |
|
|
|
415 |
87
|
jones
|
}
|