bjoern@3476: package de.intevation.flys.client.server.features;
bjoern@3476: 
bjoern@3476: import java.io.FileInputStream;
bjoern@3476: import java.io.IOException;
bjoern@3476: 
bjoern@3476: import java.util.Hashtable;
bjoern@3476: import java.util.List;
bjoern@3476: import java.util.LinkedList;
bjoern@3476: 
bjoern@3476: import javax.xml.xpath.XPathConstants;
bjoern@3476: 
bjoern@3476: import org.apache.log4j.Logger;
bjoern@3476: 
bjoern@3476: import org.w3c.dom.Document;
bjoern@3476: import org.w3c.dom.Element;
bjoern@3476: import org.w3c.dom.Node;
bjoern@3476: import org.w3c.dom.NodeList;
bjoern@3476: 
bjoern@3476: import de.intevation.artifacts.common.utils.XMLUtils;
bjoern@3476: 
bjoern@3476: public class XMLFileFeatures implements Features {
bjoern@3476: 
bjoern@3476:     private static final Logger logger = Logger.getLogger(XMLFileFeatures.class);
bjoern@3476: 
bjoern@3476:     private Hashtable<String, List<String>> featuremap = new Hashtable<String, List<String>>();
bjoern@3476: 
bjoern@3476:     public XMLFileFeatures(String filename) throws IOException {
bjoern@3476:         FileInputStream finput = new FileInputStream(filename);
bjoern@3476:         Document doc = XMLUtils.parseDocument(finput);
bjoern@3476: 
bjoern@3476:         String XPATH_FEATURES = "ftr:feature/child::text()";
bjoern@3476:         String XPATH_ROLES    = "/ftr:features/ftr:role";
bjoern@3476: 
bjoern@3476:         NodeList roles = (NodeList) XMLUtils.xpath(
bjoern@3476:             doc,
bjoern@3476:             XPATH_ROLES,
bjoern@3476:             XPathConstants.NODESET,
bjoern@3476:             FeaturesNamespaceContext.INSTANCE);
bjoern@3476: 
bjoern@3476:         for(int i=0; i < roles.getLength(); i++) {
bjoern@3476:             Node rolenode = roles.item(i);
bjoern@3476: 
bjoern@3476:             String name = XMLUtils.xpathString(
bjoern@3476:                 rolenode, "@name", FeaturesNamespaceContext.INSTANCE);
bjoern@3476: 
bjoern@3476:             logger.debug("Found role: " + name);
bjoern@3476: 
bjoern@3476:             NodeList features = (NodeList) XMLUtils.xpath(
bjoern@3476:                 rolenode,
bjoern@3476:                 XPATH_FEATURES,
bjoern@3476:                 XPathConstants.NODESET,
bjoern@3476:                 FeaturesNamespaceContext.INSTANCE);
bjoern@3476: 
bjoern@3476:             if (features.getLength() > 0) {
bjoern@3476:                 List<String> allowed = new LinkedList<String>();
bjoern@3476:                 for (int j=0; j < features.getLength(); j++) {
bjoern@3476:                     Node featurenode = features.item(j);
bjoern@3476:                     String featurename = featurenode.getNodeValue();
bjoern@3476: 
bjoern@3476:                     logger.debug("found feature: " + featurename);
bjoern@3476: 
bjoern@3476:                     allowed.add(featurename);
bjoern@3476:                 }
bjoern@3476:                 featuremap.put(name, allowed);
bjoern@3476:             }
bjoern@3476:         }
bjoern@3476:         logger.debug("Loaded all features");
bjoern@3476: 
bjoern@3476:         finput.close();
bjoern@3476:     }
bjoern@3476: 
bjoern@3476:     @Override
bjoern@3476:     public List<String> getFeatures(List<String> roles) {
bjoern@3476:         List<String> features = new LinkedList<String>();
bjoern@3476: 
bjoern@3476:         for (String role: roles) {
bjoern@3476:             List<String> allowed = this.featuremap.get(role);
bjoern@3476:             if (!allowed.isEmpty()) {
bjoern@3476:                 features.addAll(allowed);
bjoern@3476:             }
bjoern@3476:         }
bjoern@3476:         return features;
bjoern@3476:     }
bjoern@3476: }