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.exceptions.ObjectNotFoundException;
  23 import gr.ebs.gss.client.rest.resource.FileResource;
  24 import gr.ebs.gss.client.rest.resource.FolderResource;
  25 import gr.ebs.gss.client.rest.resource.GroupResource;
  26 import gr.ebs.gss.client.rest.resource.GroupUserResource;
  27 import gr.ebs.gss.client.rest.resource.GroupsResource;
  28 import gr.ebs.gss.client.rest.resource.OtherUserResource;
  29 import gr.ebs.gss.client.rest.resource.OthersResource;
  30 import gr.ebs.gss.client.rest.resource.RestResource;
  31 import gr.ebs.gss.client.rest.resource.SharedResource;
  32 import gr.ebs.gss.client.rest.resource.TrashResource;
  33 import gr.ebs.gss.client.rest.resource.UserResource;
  34
  35 import java.util.ArrayList;
  36 import java.util.Collections;
  37 import java.util.Comparator;
  38 import java.util.HashMap;
  39 import java.util.List;
  40 import java.util.Map;
  41
  42 import com.google.gwt.core.client.GWT;
  43 import com.google.gwt.http.client.Request;
  44 import com.google.gwt.http.client.Response;
  45
  46 /**
  47  * @author kman
  48  */
  49 public abstract class MultipleGetCommand<T extends RestResource> extends RestCommand {
  50
  51         Class<T> aclass;
  52         List<T> result = new ArrayList<T>();
  53         Map<String, Throwable> errors = new HashMap<String, Throwable>();
  54         String[] paths;
  55
  56         public MultipleGetCommand(Class<T> aNewClass, String[] pathToGet){
  57                 this(aNewClass, pathToGet, true);
  58         }
  59
  60         public MultipleGetCommand(Class<T> aNewClass, String[] pathToGet, boolean showLoading){
  61                 setShowLoadingIndicator(showLoading);
  62                 if(isShowLoadingIndicator())
  63                         GSS.get().showLoadingIndicator();
  64                 aclass = aNewClass;
  65                 paths = pathToGet;
  66                 for (String pathg : pathToGet) {
  67                         final String path = fixPath(pathg);
  68                         RestRequestBuilder builder = new RestRequestBuilder("GET",  path);
  69
  70                         try {
  71                                 handleHeaders(builder, path);
  72                                 builder.sendRequest("", new RestCallback(path) {
  73
  74                                         @Override
  75                                         public Object deserialize(Response response) {
  76                                                 return deserializeResponse(path, response);
  77                                         }
  78
  79                                         @Override
  80                                         public void handleError(Request request, Throwable exception) {
  81                                                 errors.put(path, exception);
  82                                         }
  83
  84                                         @Override
  85                                         public void handleSuccess(Object object) {
  86                                                 if(object!= null)
  87                                                         result.add((T)object);
  88                                                 else
  89                                                         errors.put(path, new ObjectNotFoundException("resource not found"));
  90                                         }
  91
  92                                 });
  93                         } catch (Exception ex) {
  94                                 errors.put(path, ex);
  95                         }
  96                 }
  97         }
  98
  99         public boolean isComplete() {
 100                 return result.size()+errors.size() == paths.length;
 101         }
 102
 103         public List<T> getResult() {
 104                 if(aclass.equals(FolderResource.class))
 105                         Collections.sort(result, new Comparator(){
 106                                 public int compare(Object o1, Object o2) {
 107                                         return ((FolderResource)o1).getName().compareTo(((FolderResource)o2).getName());
 108                                 }
 109
 110                         });
 111                 else if(aclass.equals(GroupResource.class))
 112                         Collections.sort(result, new Comparator(){
 113                                 public int compare(Object o1, Object o2) {
 114                                         return ((GroupResource)o1).getName().compareTo(((GroupResource)o2).getName());
 115                                 }
 116
 117                         });
 118                 else if(aclass.equals(GroupUserResource.class))
 119                         Collections.sort(result, new Comparator(){
 120                                 public int compare(Object o1, Object o2) {
 121                                         return ((GroupUserResource)o1).getName().compareTo(((GroupUserResource)o2).getName());
 122                                 }
 123
 124                         });
 125                 return result;
 126         }
 127
 128         public boolean execute() {
 129                 boolean com = isComplete();
 130                 if (com) {
 131                         if(isShowLoadingIndicator())
 132                                 GSS.get().hideLoadingIndicator();
 133                         if(hasErrors())
 134                                 for(String p : errors.keySet())
 135                                         onError(p, errors.get(p));
 136                         onComplete();
 137                         return false;
 138                 }
 139                 return true;
 140         }
 141
 142         /**
 143          * @param p
 144          * @param throwable
 145          */
 146         public abstract void onError(String p, Throwable throwable);
 147
 148         public Object deserializeResponse(String path, Response response) {
 149                 RestResource result1 = null;
 150                 if(aclass.equals(FolderResource.class)){
 151                         result1 = new FolderResource(path);
 152                         result1.createFromJSON(response.getText());
 153                 }
 154                 else if(aclass.equals(FileResource.class)){
 155                         result1 = new FileResource(path);
 156                         result1.createFromJSON(response.getHeader("X-GSS-Metadata"));
 157                 }
 158                 else if(aclass.equals(GroupsResource.class)){
 159                         result1 = new GroupsResource(path);
 160                         result1.createFromJSON(response.getText());
 161                 }
 162                 else if(aclass.equals(TrashResource.class)){
 163                         result1 = new TrashResource(path);
 164                         result1.createFromJSON(response.getText());
 165                 }
 166                 else if(aclass.equals(SharedResource.class)){
 167                         result1 = new SharedResource(path);
 168                         result1.createFromJSON(response.getText());
 169                 }
 170                 else if(aclass.equals(OthersResource.class)){
 171                         result1 = new OthersResource(path);
 172                         result1.createFromJSON(response.getText());
 173                 }
 174                 else if(aclass.equals(OtherUserResource.class)){
 175                         result1 = new OtherUserResource(path);
 176                         result1.createFromJSON(response.getText());
 177                 }
 178                 else if(aclass.equals(GroupResource.class)){
 179                         result1 = new GroupResource(path);
 180                         result1.createFromJSON(response.getText());
 181                 }
 182                 else if(aclass.equals(GroupUserResource.class)){
 183                         result1 = new GroupUserResource(path);
 184                         result1.createFromJSON(response.getText());
 185                 }
 186                 else if(aclass.equals(UserResource.class)){
 187                         result1 = new UserResource(path);
 188                         result1.createFromJSON(response.getText());
 189                 }
 190                 return result1;
 191         }
 192
 193         public boolean hasErrors(){
 194                 return errors.size() >0;
 195         }
 196
 197         /**
 198          * Retrieve the errors.
 199          *
 200          * @return the errors
 201          */
 202         public Map<String, Throwable> getErrors() {
 203                 return errors;
 204         }
 205
 206         protected void debug(){
 207                 GWT.log("--->"+result.size(), null);
 208                 GWT.log("-ERRORS-->"+getErrors().size(), null);
 209                 for(String p : getErrors().keySet())
 210                         GWT.log("error:"+p, getErrors().get(p));
 211         }
 212 }