Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/features/XMLFileFeatures.java @ 5818:a4ff4167be1e
Request feature info on all layers and show it as html if
the server does not return valid gml.
Non queryable layers produce an error message when the request
fails. This is good enough
author | Andre Heinecke <aheinecke@intevation.de> |
---|---|
date | Wed, 24 Apr 2013 17:33:27 +0200 |
parents | 02cf2b1dff84 |
children |
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package de.intevation.flys.client.server.features; import java.io.FileInputStream; import java.io.IOException; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.xml.xpath.XPathConstants; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import de.intevation.artifacts.common.utils.XMLUtils; public class XMLFileFeatures implements Features { private static final Logger logger = Logger.getLogger(XMLFileFeatures.class); private Map<String, List<String>> featuremap = new HashMap<String, List<String>>(); private final static String XPATH_FEATURES = "ftr:feature/child::text()"; private final static String XPATH_ROLES = "/ftr:features/ftr:role"; public XMLFileFeatures(String filename) throws IOException { FileInputStream finput = new FileInputStream(filename); logger.debug("XMLFileFeatures: " + filename); try { Document doc = XMLUtils.parseDocument(finput); NodeList roles = (NodeList) XMLUtils.xpath( doc, XPATH_ROLES, XPathConstants.NODESET, FeaturesNamespaceContext.INSTANCE); for(int i = 0, m = roles.getLength(); i < m; i++) { Element rolenode = (Element)roles.item(i); String name = rolenode.getAttribute("name"); logger.debug("Found role: " + name); NodeList features = (NodeList) XMLUtils.xpath( rolenode, XPATH_FEATURES, XPathConstants.NODESET, FeaturesNamespaceContext.INSTANCE); if (features == null) { continue; } int N = features.getLength(); if (N > 0) { List<String> allowed = new ArrayList<String>(N); for (int j = 0; j < N; j++) { Node featurenode = features.item(j); String featurename = featurenode.getNodeValue(); logger.debug("Found feature: " + featurename); allowed.add(featurename); } featuremap.put(name, allowed); } } logger.debug("Loaded all features"); } finally { finput.close(); } } @Override public List<String> getFeatures(List<String> roles) { List<String> features = new ArrayList<String>(); for (String role: roles) { List<String> allowed = this.featuremap.get(role); if (allowed != null) { features.addAll(allowed); } } return features; } }