runtime/org.argeo.slc.support.simple/src/main/java/org/argeo/slc/spring/SpringUtils.java

   1 package org.argeo.slc.spring;
   2
   3 import java.io.IOException;
   4 import java.net.URI;
   5 import java.util.Map;
   6
   7 import org.apache.commons.logging.Log;
   8 import org.apache.commons.logging.LogFactory;
   9 import org.argeo.slc.SlcException;
  10 import org.springframework.beans.factory.BeanFactoryUtils;
  11 import org.springframework.beans.factory.ListableBeanFactory;
  12 import org.springframework.core.io.DefaultResourceLoader;
  13 import org.springframework.core.io.Resource;
  14
  15 public class SpringUtils {
  16         private final static Log log = LogFactory.getLog(SpringUtils.class);
  17
  18         public static <T> T loadSingleFromContext(ListableBeanFactory context,
  19                         Class<T> clss) {
  20                 // Map<String, T> beans = context.getBeansOfType(clss);
  21                 Map<String, T> beans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
  22                                 context, clss, false, false);
  23                 if (beans.size() == 1) {
  24                         return beans.values().iterator().next();
  25                 } else if (beans.size() > 1) {
  26                         if (log.isDebugEnabled()) {
  27                                 log
  28                                                 .debug(("Found more that on bean for type " + clss
  29                                                                 + ": " + beans.keySet()));
  30                         }
  31                         return null;
  32                 } else {
  33                         return null;
  34                 }
  35         }
  36
  37         public static Resource getParent(Resource res) {
  38                 try {
  39                         if (res.getURL().getPath().equals("/"))
  40                                 return null;
  41
  42                         String urlStr = res.getURL().toString();
  43                         if (urlStr.charAt(urlStr.length() - 1) == '/')
  44                                 urlStr = urlStr.substring(0, urlStr.length() - 2);
  45
  46                         String parentUrlStr = urlStr.substring(0, urlStr.lastIndexOf('/')) + '/';
  47                         URI uri = new URI(parentUrlStr).normalize();
  48                         return new DefaultResourceLoader(Thread.currentThread()
  49                                         .getContextClassLoader()).getResource(uri.toString());
  50                 } catch (Exception e) {
  51                         throw new SlcException("Cannot get parent for resource " + res, e);
  52                 }
  53         }
  54
  55         public static String extractRelativePath(Resource ancestor, Resource child) {
  56                 try {
  57
  58                         return ancestor.getURL().toURI().relativize(child.getURL().toURI())
  59                                         .normalize().toString();
  60                 } catch (Exception e) {
  61                         throw new SlcException("Cannot extract relative path of " + child
  62                                         + " based on " + ancestor, e);
  63                 }
  64         }
  65
  66         private SpringUtils() {
  67
  68         }
  69 }