package org.korsakow.services.tdg;
import javax.xml.xpath.XPathException;
import javax.xml.xpath.XPathExpressionException;
import org.korsakow.ide.DataRegistry;
import org.korsakow.ide.XPathHelper;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
public class PatternTDG
{
public static final String NODE_NAME = "Pattern";
public static int insert(long version, String pattern_type) throws XPathException{
return insert(DataRegistry.getMaxId(), version, pattern_type);
}
public static int insert(long id, long version, String pattern_type) throws XPathExpressionException{
Element element = DataRegistry.getHelper().appendElement("/korsakow/patterns", NODE_NAME);
DataRegistry.getHelper().setLong(element, "id", id);
DataRegistry.getHelper().setLong(element, "version", version);
return update(id, version, pattern_type);
}
public static int update(long id, long version, String pattern_type) throws XPathExpressionException{
Element element = DataRegistry.getHelper().findElementByIdTag(id);
// Element element = DataRegistry.getHelper().xpathAsElement(XPathHelper.formatQuery("/korsakow/patterns/Pattern[id=? and version=?]", id, version));
if (element == null)
return 0;
DataRegistry.getHelper().setLong(element, "id", id);
DataRegistry.getHelper().setLong(element, "version", version+1);
DataRegistry.getHelper().setString(element, "patternType", pattern_type);
return 1;
}
public static int delete(long id, long version) throws XPathExpressionException {
NodeList list = DataRegistry.getHelper().removeNodes(XPathHelper.formatQuery("/korsakow/patterns/Pattern[id=? and version=?]", id, version));
return list.getLength();
}
public static void createPatternTable() throws XPathExpressionException {
if (DataRegistry.getHelper().xpathAsElement("/korsakow/patterns") == null) {
DataRegistry.getHelper().appendElement("/korsakow", "patterns");
}
}
public static void dropTable () throws XPathExpressionException{
DataRegistry.getHelper().removeNodes(XPathHelper.formatQuery("/korsakow/patterns"));
}
}