Revision 72
Added by bojilova almost 24 years ago
| DBSAXHandler.java | ||
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* Version: '$Id$' |
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*/ |
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package edu.ucsb.nceas.metacat; |
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//package edu.ucsb.nceas.metacat;
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import org.xml.sax.*; |
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import oracle.xml.parser.v2.SAXAttrList; |
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import oracle.xml.parser.v2.SAXParser; |
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import oracle.xml.parser.v2.DTD; |
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/** |
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* A database aware Class implementing callback bethods for the SAX parser to |
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public class DBSAXHandler extends DefaultXMLDocumentHandler |
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{
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static int elementNo = 0; |
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private String docname; |
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private String doctype; |
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private String systemid; |
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private boolean debug = false; |
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private boolean stackCreated = false; |
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private Stack elementStack; |
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} |
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/** SAX Handler that receives notification of beginning of the document */ |
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public void startDocument() throws SAXException |
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{
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System.out.println("start Document");
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} |
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/** SAX Handler that receives notification of end of the document */ |
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public void endDocument() throws SAXException |
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{
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System.out.println("end Document");
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} |
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/** SAX Handler that receives notification of DTD. Sets the DTD */ |
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public void setDoctype(DTD dtd) throws SAXException |
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{
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// here is a bug: dtd.getPublicId() and dtd.getSustemId() return null. |
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docname = dtd.getName(); |
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doctype = dtd.getPublicId(); |
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systemid = dtd.getSystemId(); |
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System.out.println("DOCTYPE: " + docname);
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System.out.println("DOCTYPE: " + doctype);
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System.out.println("DOCTYPE: " + systemid);
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} |
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/** SAX Handler that receives notification of end of DTD |
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* All events in DTDHandler about all unparsed entities and the event in EntityResolver for the DTD file declaration |
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* appear between setDoctype and endDoctype. |
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* The rest of parsable external entities inside DTD file appear later in the elements from where they are referred to. */ |
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public void endDoctype() throws SAXException |
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{
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System.out.println("end of DOCTYPE");
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if (doctype == null) |
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doctype = DBEntityResolver.doctype; |
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} |
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/** SAX Handler that is called at the start of each XML element */ |
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public void startElement(NSName name, SAXAttrList atts) throws SAXException |
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{
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nsName = name.getNamespace(); |
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expName = name.getExpandedName(); |
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elementNo++; |
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if ((elementNo == 1) && (doctype == null)) |
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throw new SAXException("No DOCTYPE declaration or PUBLIC ID provided");
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// Get a reference to the parent element for the id |
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long parent_id; |
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int nodeIndex; |
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try {
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parentElement = (DBSAXElement)elementStack.peek(); |
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parent_id = parentElement.getElementID(); |
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nodeIndex = parentElement.incChildNum(); |
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} catch (EmptyStackException e) {
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parent_id = 0; |
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nodeIndex = 0; |
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} |
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// Create the current element representation |
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currentElement = new DBSAXElement(conn, localName, parent_id); |
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currentElement = new DBSAXElement(conn, localName, parent_id, nodeIndex); |
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// go to create document definition in the db |
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// call once after insertion of the first element |
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if (parent_id == 0) {
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long rootnodeid = currentElement.getElementID(); |
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new DBSAXDocument(conn, rootnodeid, docname, doctype); |
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} |
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// Add all of the attributes |
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for (int i=0; i<atts.getLength(); i++) |
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{
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} |
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/** SAX Handler called once for each comment found: |
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* node that comment may occur before or after the root element. |
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* For now works only for comments after the root element. */ |
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public void comment(String data) throws SAXException |
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{
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if (elementNo > 0) {
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DBSAXElement currentElement = (DBSAXElement)elementStack.peek(); |
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currentElement.writeCommentToDB(data); |
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} |
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} |
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/** SAX Handler that is called at the end of each XML element */ |
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public void endElement(NSName name) throws SAXException |
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{
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Also available in: Unified diff
Included new features about writing XML documents into db
This includes writing data into db XML Catalog, document data into xml_documents,
comments into xml_nodes, added nodeindex for the order of elements by given parent element.