code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/client/rest/MultipleGetCommand.java

   1 /*
   2  * Copyright 2009 Electronic Business Systems Ltd.
   3  *
   4  * This file is part of GSS.
   5  *
   6  * GSS is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GSS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 package gr.ebs.gss.client.rest;
  20
  21 import gr.ebs.gss.client.GSS;
  22 import gr.ebs.gss.client.rest.resource.FileResource;
  23 import gr.ebs.gss.client.rest.resource.FolderResource;
  24 import gr.ebs.gss.client.rest.resource.GroupResource;
  25 import gr.ebs.gss.client.rest.resource.GroupUserResource;
  26 import gr.ebs.gss.client.rest.resource.GroupsResource;
  27 import gr.ebs.gss.client.rest.resource.OtherUserResource;
  28 import gr.ebs.gss.client.rest.resource.OthersResource;
  29 import gr.ebs.gss.client.rest.resource.RestResource;
  30 import gr.ebs.gss.client.rest.resource.SharedResource;
  31 import gr.ebs.gss.client.rest.resource.TrashResource;
  32 import gr.ebs.gss.client.rest.resource.UserResource;
  33
  34 import java.util.ArrayList;
  35 import java.util.Collections;
  36 import java.util.Comparator;
  37 import java.util.HashMap;
  38 import java.util.List;
  39 import java.util.Map;
  40
  41 import com.google.gwt.core.client.GWT;
  42 import com.google.gwt.http.client.Response;
  43 import com.google.gwt.user.client.DeferredCommand;
  44
  45 /**
  46  * @author kman
  47  */
  48 public abstract class MultipleGetCommand<T extends RestResource> extends RestCommand {
  49
  50         Class<T> aclass;
  51         List<T> result = new ArrayList<T>();
  52         Map<String, Throwable> errors = new HashMap<String, Throwable>();
  53         Cached[] cached;
  54         String[] paths;
  55         private boolean requestSent=false;
  56
  57         public MultipleGetCommand(Class<T> aNewClass, String[] pathToGet, Cached[] theCached) {
  58                 this(aNewClass, pathToGet, true, theCached);
  59         }
  60
  61         public MultipleGetCommand(Class<T> aNewClass, String[] pathToGet, boolean showLoading, Cached[] theCached) {
  62                 setShowLoadingIndicator(showLoading);
  63                 if (isShowLoadingIndicator())
  64                         GSS.get().showLoadingIndicator();
  65                 aclass = aNewClass;
  66                 paths = pathToGet;
  67                 this.cached = theCached;
  68                 //sendRequest();
  69         }
  70
  71         private void sendRequest() {
  72                 if (requestSent)
  73                         return;
  74                 requestSent=true;
  75                 if (cached!=null)
  76                         for (final Cached pathg : cached)
  77                                 DeferredCommand.addCommand(new GetCommand<T>(aclass,pathg.uri,false,(T)pathg.cache) {
  78
  79                                         @Override
  80                                         public void onComplete() {
  81                                                 MultipleGetCommand.this.result.add(getResult());
  82                                         }
  83
  84                                         @Override
  85                                         public void onError(Throwable t) {
  86                                                 errors.put(pathg.uri, t);
  87                                         }
  88
  89                                 });
  90                 else
  91                         for (final String pathg : paths)
  92                                 DeferredCommand.addCommand(new GetCommand<T>(aclass,pathg,false,null) {
  93
  94                                         @Override
  95                                         public void onComplete() {
  96                                                 MultipleGetCommand.this.result.add(getResult());
  97                                         }
  98
  99                                         @Override
 100                                         public void onError(Throwable t) {
 101                                                 errors.put(pathg, t);
 102                                         }
 103
 104                                 });
 105         }
 106
 107         public boolean isComplete() {
 108                 return result.size()+errors.size() == paths.length;
 109         }
 110
 111         public List<T> getResult() {
 112                 if (aclass.equals(FolderResource.class))
 113                         Collections.sort(result, new Comparator() {
 114                                 @Override
 115                                 public int compare(Object o1, Object o2) {
 116                                         return ((FolderResource)o1).getName().compareTo(((FolderResource)o2).getName());
 117                                 }
 118
 119                         });
 120                 else if(aclass.equals(GroupResource.class))
 121                         Collections.sort(result, new Comparator() {
 122                                 @Override
 123                                 public int compare(Object o1, Object o2) {
 124                                         return ((GroupResource)o1).getName().compareTo(((GroupResource)o2).getName());
 125                                 }
 126
 127                         });
 128                 else if(aclass.equals(GroupUserResource.class))
 129                         Collections.sort(result, new Comparator() {
 130                                 @Override
 131                                 public int compare(Object o1, Object o2) {
 132                                         return ((GroupUserResource)o1).getName().compareTo(((GroupUserResource)o2).getName());
 133                                 }
 134
 135                         });
 136                 return result;
 137         }
 138
 139         @Override
 140         public boolean execute() {
 141                 if (!requestSent)
 142                         sendRequest();
 143                 boolean com = isComplete();
 144                 if (com) {
 145                         if (isShowLoadingIndicator())
 146                                 GSS.get().hideLoadingIndicator();
 147                         if (hasErrors())
 148                                 for(String p : errors.keySet())
 149                                         onError(p, errors.get(p));
 150                         onComplete();
 151                         return false;
 152                 }
 153                 return true;
 154         }
 155
 156         /**
 157          * @param p
 158          * @param throwable
 159          */
 160         public abstract void onError(String p, Throwable throwable);
 161
 162         public Object deserializeResponse(String path, Response response) {
 163                 RestResource result1 = null;
 164                 if (aclass.equals(FolderResource.class)) {
 165                         result1 = new FolderResource(path);
 166                         result1.createFromJSON(response.getText());
 167                 }
 168                 else if (aclass.equals(FileResource.class)){
 169                         result1 = new FileResource(path);
 170                         result1.createFromJSON(response.getHeader("X-GSS-Metadata"));
 171                 }
 172                 else if (aclass.equals(GroupsResource.class)) {
 173                         result1 = new GroupsResource(path);
 174                         result1.createFromJSON(response.getText());
 175                 }
 176                 else if (aclass.equals(TrashResource.class)) {
 177                         result1 = new TrashResource(path);
 178                         result1.createFromJSON(response.getText());
 179                 }
 180                 else if (aclass.equals(SharedResource.class)) {
 181                         result1 = new SharedResource(path);
 182                         result1.createFromJSON(response.getText());
 183                 }
 184                 else if (aclass.equals(OthersResource.class)) {
 185                         result1 = new OthersResource(path);
 186                         result1.createFromJSON(response.getText());
 187                 }
 188                 else if (aclass.equals(OtherUserResource.class)) {
 189                         result1 = new OtherUserResource(path);
 190                         result1.createFromJSON(response.getText());
 191                 }
 192                 else if (aclass.equals(GroupResource.class)) {
 193                         result1 = new GroupResource(path);
 194                         result1.createFromJSON(response.getText());
 195                 }
 196                 else if (aclass.equals(GroupUserResource.class)) {
 197                         result1 = new GroupUserResource(path);
 198                         result1.createFromJSON(response.getText());
 199                 }
 200                 else if (aclass.equals(UserResource.class)) {
 201                         result1 = new UserResource(path);
 202                         result1.createFromJSON(response.getText());
 203                 }
 204                 return result1;
 205         }
 206
 207         public boolean hasErrors() {
 208                 return errors.size() >0;
 209         }
 210
 211         /**
 212          * Retrieve the errors.
 213          *
 214          * @return the errors
 215          */
 216         public Map<String, Throwable> getErrors() {
 217                 return errors;
 218         }
 219
 220         protected void debug() {
 221                 GWT.log("--->"+result.size(), null);
 222                 GWT.log("-ERRORS-->"+getErrors().size(), null);
 223                 for(String p : getErrors().keySet())
 224                         GWT.log("error:"+p, getErrors().get(p));
 225         }
 226
 227         public static class Cached {
 228                 public String uri;
 229                 public RestResource cache;
 230         }
 231 }