runtime/org.argeo.slc.server/src/main/java/org/argeo/slc/web/mvc/provisioning/ModularDistributionInterceptor.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.argeo.slc.web.mvc.provisioning;
  18
  19 import java.util.Iterator;
  20 import java.util.Set;
  21 import java.util.SortedMap;
  22 import java.util.StringTokenizer;
  23 import java.util.TreeMap;
  24
  25 import javax.servlet.http.HttpServletRequest;
  26 import javax.servlet.http.HttpServletResponse;
  27
  28 import org.argeo.slc.SlcException;
  29 import org.argeo.slc.build.BasicNameVersion;
  30 import org.argeo.slc.build.BuildConstants;
  31 import org.argeo.slc.build.ModularDistribution;
  32 import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
  33
  34 public class ModularDistributionInterceptor extends HandlerInterceptorAdapter {
  35         private Set<ModularDistribution> modularDistributions;
  36
  37         @Override
  38         public boolean preHandle(HttpServletRequest request,
  39                         HttpServletResponse response, Object handler) throws Exception {
  40                 String path = request.getPathInfo();
  41                 StringTokenizer stS = new StringTokenizer(path, "/");
  42                 String distributionName = stS.nextToken();
  43                 String distributionVersion = stS.nextToken();
  44
  45                 SortedMap<String, ModularDistribution> choices = new TreeMap<String, ModularDistribution>();
  46                 distribs: for (Iterator<ModularDistribution> it = modularDistributions
  47                                 .iterator(); it.hasNext();) {
  48                         ModularDistribution md = it.next();
  49                         if (md.getName().equals(distributionName)) {
  50                                 if (distributionVersion.equals(BuildConstants.RELEASE)
  51                                                 && md.getVersion().contains(BuildConstants.SNAPSHOT))
  52                                         continue distribs;
  53
  54                                 else if (distributionVersion.equals(BuildConstants.LATEST))
  55                                         choices.put(md.getVersion(), md);
  56                                 else if (distributionVersion.equals(md.getVersion())) {
  57                                         choices.put(md.getVersion(), md);
  58                                         break distribs;
  59                                 }
  60                         }
  61                 }
  62
  63                 if (choices.size() == 0)
  64                         throw new SlcException("Cannot find distribution for "
  65                                         + new BasicNameVersion(distributionName,
  66                                                         distributionVersion));
  67
  68                 ModularDistribution modularDistribution = choices.get(choices
  69                                 .firstKey());
  70
  71                 request.setAttribute("modularDistribution", modularDistribution);
  72
  73                 return true;
  74         }
  75
  76         public void setModularDistributions(
  77                         Set<ModularDistribution> modularDistributions) {
  78                 this.modularDistributions = modularDistributions;
  79         }
  80
  81 }