source: MDService2/branches/MDService_simple3/src/eu/clarin/cmdi/mdservice/model/Termset.java @ 1654

package eu.clarin.cmdi.mdservice.model;

import java.util.HashMap;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.apache.log4j.Logger;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import eu.clarin.cmdi.mdservice.internal.Utils;

public class Termset {

        public static Logger log = Logger.getLogger("Termset");
        
        private final static HashMap<String,Object> termsets = new HashMap<String,Object>();
        
        private final HashMap<String,String> attrs = new HashMap<String,String>();
        
        public Termset () {             
        }

        public Termset (Node n) {
                this.setAttrs(n);
        }
        
        public void setAttrs(Node n) {
        
                        for (int i=0; i < n.getAttributes().getLength(); i++) {
                                String key = n.getAttributes().item(i).getNodeName();
                                String value = n.getAttributes().item(i).getNodeValue();
                                attrs.put(key, value);
                        }               
        }
        
        public String getAttr(String key) {
          return attrs.get(key);
        }

        public static HashMap<String, Object> getTermsets() {
                if (termsets.size() == 0) {
                        initTermsets();                 
                }
                return termsets;
        }

        public static Termset getTermset(String ts_id) {                
                
                Termset res = (Termset) getTermsets().get(ts_id);
                if (res==null) log.debug("getTermset(): no termset found for:" + ts_id);
                //else
                        //log.debug("getDCR():" + res.getAttr("id") + ":" + res.getAttr("url") );               
                return res;
        }
        
        public static String getTermsetAttr(String ts_id, String key) { 
                Termset ts = getTermset(ts_id);
                String val=""; 
                if (ts!=null) val= ts.getAttr(key);
                 return val;
        }

        public static void initTermsets() {
                        Document dcrs_setup = Utils.load2Document(Utils.getConfig("terms.file"));
                
                //      Utils.load2(Utils.getConfig().getProperty("service.list.file"));                 
                        log.debug("initTermsets().loaded.");                                    
                        //.getDocumentElement().getLocalName()
                        //Document chains_doc = Utils.load2Document(Utils.getConfig().getProperty("chains.file"));
        
                        //log.debug("formPath:xpath:"+xpath_expr);
                        //creating an XPathFactory:
                XPathFactory factory = XPathFactory.newInstance();
                //using this factory to create an XPath object: 
                XPath xpath = factory.newXPath();
                //XPath object created compiles the XPath expression: 
                XPathExpression expr;
                        try {
                                expr = xpath.compile("//Termset");
                                //expression is evaluated with respect to a certain context node which is doc.
                        Object result = expr.evaluate(dcrs_setup, XPathConstants.NODESET);
                        NodeList list = (NodeList) result;
        
                        // <Termset type="dcr" id="isocat" label="isoCAT" url="http://www.isocat.org/rest/" format="dcif" />
                        for (int i = 0; i<list.getLength();i++) {
                                //String value = list.item(i).getTextContent();
                                Node n = list.item(i);                          
                                Termset ts = new Termset(n);                    
                                                        
                                log.debug("reading in Termset: " + ts.getAttr("id"));
                                termsets.put(ts.getAttr("id"), ts );
                        }    
                        } catch (XPathExpressionException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        }

        }
        
        
}