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package org.madore.damlengine;
import java.util.regex.Pattern;
import java.io.InputStream;
import java.security.MessageDigest;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.xml.xpath.*;
import org.w3c.dom.*;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSParser;
import org.w3c.dom.ls.LSSerializer;
import org.w3c.dom.ls.LSInput;
public final class WeblogPopulate {
private WeblogPopulate() { // Forbid instantiation
throw new AssertionError("WeblogPopulate cannot be instantiated");
}
public static final String toHex(byte[] digest) {
StringBuilder sb = new StringBuilder();
for ( byte b : digest )
sb.append(String.format("%02x", b));
return sb.toString();
}
public static void populate(InputStream in)
throws Exception {
final DOMImplementationLS domils
= (DOMImplementationLS)(DamlEngine.IncantDOM.getDOMI());
LSSerializer ser = domils.createLSSerializer();
ser.getDomConfig().setParameter("xml-declaration", false);
LSParser par = domils.createLSParser(DOMImplementationLS.MODE_SYNCHRONOUS, null);
par.getDomConfig().setParameter("resource-resolver", new Resolver());
par.getDomConfig().setParameter("http://xml.org/sax/features/validation", true);
par.getDomConfig().setParameter("http://xml.org/sax/features/namespaces", true);
par.getDomConfig().setParameter("http://apache.org/xml/properties/internal/error-handler", new DamlEngine.SelectiveErrorHandler());
MessageDigest sha1 = MessageDigest.getInstance("SHA-1");
final Connection conn = WeblogDatabaseConnection.getConnection();
final PreparedStatement checkSt
= conn.prepareStatement("SELECT sha1 FROM entries WHERE id=?");
final PreparedStatement insertNSt
= conn.prepareStatement("INSERT INTO entries(id,edate,lang,title,title_xml,content,sha1) VALUES (?,?,?,?,?::xml,?::xml,?)");
final PreparedStatement insertCSt
= conn.prepareStatement("INSERT INTO entries(id,edate,lang,title,title_xml,content,sha1,cdate) VALUES (?,?,?,?,?::xml,?::xml,?,?::timestamptz)");
final PreparedStatement updateNSt
= conn.prepareStatement("UPDATE entries SET (edate,mdate,lang,title,title_xml,content,sha1)=(?,DEFAULT,?,?,?::xml,?::xml,?) WHERE id=?");
final PreparedStatement updateCSt
= conn.prepareStatement("UPDATE entries SET (edate,mdate,lang,title,title_xml,content,sha1,cdate)=(?,DEFAULT,?,?,?::xml,?::xml,?,?::timestamptz) WHERE id=?");
final PreparedStatement checkDateSt
= conn.prepareStatement("SELECT to_char(cdate,'YYYY-MM-DD\"T\"HH24:MI:SS\"Z\"') FROM entries WHERE id=?");
final PreparedStatement clearCatSt
= conn.prepareStatement("DELETE FROM incat WHERE id=?");
final PreparedStatement setCatSt
= conn.prepareStatement("INSERT INTO incat(id,code) VALUES (?,?)");
LSInput input = domils.createLSInput();
input.setByteStream(in);
Document doc = par.parse(input);
XPathFactory xpf = XPathFactory.newInstance();
XPath xp = xpf.newXPath();
xp.setNamespaceContext(new DamlEngine.DamlNSMapping());
XPathExpression expr = xp.compile("//d:weblog/d:entry");
XPathExpression texpr = xp.compile("d:title");
NodeList entries = (NodeList)(expr.evaluate(doc, XPathConstants.NODESET));
for ( int i=0 ; i<entries.getLength() ; i++ ) {
Element ent = (Element)(entries.item(i));
String idStr = ent.getAttributeNS(null, "number");
if ( ! Pattern.matches("^\\d{4}$", idStr) )
throw new IllegalArgumentException("entry number attribute must be of the form NNNN");
int id = Integer.parseInt(idStr);
String date = ent.getAttributeNS(null, "date");
if ( ! Pattern.matches("^\\d{4}-\\d{2}-\\d{2}$", date) )
throw new IllegalArgumentException("entry date attribute must be of the form YYYY-MM-DD");
String cdate;
if ( ent.hasAttributeNS(null, "cdate") )
cdate = ent.getAttributeNS(null, "cdate");
else
cdate = null;
String catStr = ent.getAttributeNS(null, "cat");
String[] catList = catStr.split("\\s+");
String lang = LangHelper.getLangRec(ent);
String content = ser.writeToString(ent);
sha1.reset();
String digest = toHex(sha1.digest(content.getBytes("UTF-8")));
checkSt.setInt(1, id);
ResultSet checkRes = checkSt.executeQuery();
boolean exists = checkRes.next();
if ( exists && checkRes.getString(1).equals(digest) )
continue;
Node titleNode = (Node)(texpr.evaluate(ent, XPathConstants.NODE));
String titleTxt = (titleNode != null) ? titleNode.getTextContent() : null;
String titleXml = (titleNode != null) ? ser.writeToString(titleNode) : null;
conn.setAutoCommit(false);
if ( exists ) {
System.err.println("Updating entry "+id);
PreparedStatement updateSt;
if ( cdate == null )
updateSt = updateNSt;
else
updateSt = updateCSt;
updateSt.setString(1, date);
updateSt.setString(2, lang);
updateSt.setString(3, titleTxt);
updateSt.setString(4, titleXml);
updateSt.setString(5, content);
updateSt.setString(6, digest);
if ( cdate != null ) {
updateSt.setString(7, cdate);
updateSt.setInt(8, id);
} else {
updateSt.setInt(7, id);
}
updateSt.executeUpdate();
} else {
System.err.println("Registering entry "+id);
PreparedStatement insertSt;
if ( cdate == null )
insertSt = insertNSt;
else
insertSt = insertCSt;
insertSt.setInt(1, id);
insertSt.setString(2, date);
insertSt.setString(3, lang);
insertSt.setString(4, titleTxt);
insertSt.setString(5, titleXml);
insertSt.setString(6, content);
insertSt.setString(7, digest);
if ( cdate != null )
insertSt.setString(8, cdate);
insertSt.executeUpdate();
}
if ( ! Pattern.matches("^\\d{4}-\\d{2}-\\d{2}T\\d{2}\\:\\d{2}(?:\\:\\d{2})?(?:Z|[\\+\\-]\\d{2}\\:\\d{2})$", cdate) ) {
checkDateSt.setInt(1, id);
ResultSet checkDate = checkDateSt.executeQuery();
checkDate.next();
String checkDateStr = checkDate.getString(1);
System.err.println("cdate for entry "+id+": "
+checkDateStr);
}
clearCatSt.setInt(1, id);
clearCatSt.executeUpdate();
for ( String cat : catList ) {
if ( ! cat.equals("") ) {
setCatSt.setInt(1, id);
setCatSt.setString(2, cat);
setCatSt.executeUpdate();
}
}
conn.commit();
}
checkSt.close();
insertNSt.close();
insertCSt.close();
updateNSt.close();
updateCSt.close();
checkDateSt.close();
clearCatSt.close();
setCatSt.close();
}
}
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