code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/client/rest/MultipleHeadCommand.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.MultipleGetCommand.Cached;
  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.RestResource;
  29 import gr.ebs.gss.client.rest.resource.SharedResource;
  30 import gr.ebs.gss.client.rest.resource.TrashResource;
  31 import gr.ebs.gss.client.rest.resource.UserResource;
  32
  33 import java.util.ArrayList;
  34 import java.util.HashMap;
  35 import java.util.List;
  36 import java.util.Map;
  37
  38 import com.google.gwt.core.client.GWT;
  39 import com.google.gwt.http.client.Response;
  40 import com.google.gwt.user.client.DeferredCommand;
  41
  42
  43 /**
  44  * @author kman
  45  *
  46  */
  47 public abstract class MultipleHeadCommand <T extends RestResource> extends RestCommand {
  48         String[] paths;
  49         Class<T> aclass;
  50         List<T> result = new ArrayList<T>();
  51         Map<String, Throwable> errors = new HashMap<String, Throwable>();
  52         private boolean requestSent=false;
  53         Cached[] cached;
  54
  55         public MultipleHeadCommand(Class<T> theClass, String[] pathToGet, Cached[] theCached) {
  56                 this(theClass, pathToGet, true, theCached);
  57         }
  58
  59         public MultipleHeadCommand(Class<T> theClass, String[] pathToGet, boolean showLoading, Cached[] theCached) {
  60                 setShowLoadingIndicator(showLoading);
  61                 if(isShowLoadingIndicator())
  62                         GSS.get().showLoadingIndicator();
  63                 paths = pathToGet;
  64                 this.aclass = theClass;
  65                 this.cached = theCached;
  66                 //sendRequest();
  67         }
  68
  69         private void sendRequest() {
  70                 if(requestSent)
  71                         return;
  72                 requestSent=true;
  73                 if(cached!=null)
  74                         for (final Cached c : cached){
  75                                 final String path;
  76                                 if(aclass.equals(FileResource.class)){
  77                                         if(c.uri.indexOf("?") == -1)
  78                                                 path=c.uri+"?"+Math.random();
  79                                         else
  80                                                 path=c.uri;
  81                                 }
  82                                 else
  83                                         path = fixPath(c.uri);
  84                                 DeferredCommand.addCommand(new HeadCommand<T>(aclass,path,false, (T)c.cache) {
  85
  86                                         @Override
  87                                         public void onComplete() {
  88                                                 MultipleHeadCommand.this.result.add(getResult());
  89                                         }
  90
  91                                         @Override
  92                                         public void onError(Throwable t) {
  93                                                 errors.put(path, t);
  94                                         }
  95
  96                                 });
  97                         }
  98                 else
  99                         for (String pathg : paths) {
 100                                 final String path;
 101                                 if(aclass.equals(FileResource.class))
 102                                         path = pathg;
 103                                 else
 104                                         path = fixPath(pathg);
 105                                 DeferredCommand.addCommand(new HeadCommand<T>(aclass,path,false, null) {
 106                                         @Override
 107                                         public void onComplete() {
 108                                                 MultipleHeadCommand.this.result.add(getResult());
 109                                         }
 110
 111                                         @Override
 112                                         public void onError(Throwable t) {
 113                                                 errors.put(path, t);
 114                                         }
 115                                 });
 116                         }
 117         }
 118         public boolean isComplete() {
 119                 return result.size()+errors.size() == paths.length;
 120         }
 121
 122         public List<T> getResult() {
 123                 return result;
 124         }
 125
 126         @Override
 127         public boolean execute() {
 128                 if(!requestSent)
 129                         sendRequest();
 130                 boolean com = isComplete();
 131                 if (com) {
 132                         if(isShowLoadingIndicator())
 133                                 GSS.get().hideLoadingIndicator();
 134                         if(hasErrors())
 135                                 for(String p : errors.keySet())
 136                                         onError(p, errors.get(p));
 137                         onComplete();
 138                         return false;
 139                 }
 140                 return true;
 141         }
 142
 143         /**
 144          * @param p
 145          * @param throwable
 146          */
 147         public abstract void onError(String p, Throwable throwable);
 148
 149         public Object deserializeResponse(String path, Response response) {
 150                 RestResource result1 = null;
 151                 if (aclass.equals(FolderResource.class)) {
 152                         result1 = new FolderResource(path);
 153                         result1.createFromJSON(response.getText());
 154                 } else if (aclass.equals(FileResource.class)) {
 155                         result1 = new FileResource(path);
 156                         result1.createFromJSON(response.getHeader("X-GSS-Metadata"));
 157                 } else if (aclass.equals(GroupsResource.class)) {
 158                         result1 = new GroupsResource(path);
 159                         result1.createFromJSON(response.getText());
 160                 } else if (aclass.equals(TrashResource.class)) {
 161                         result1 = new TrashResource(path);
 162                         result1.createFromJSON(response.getText());
 163                 } else if (aclass.equals(SharedResource.class)) {
 164                         result1 = new SharedResource(path);
 165                         result1.createFromJSON(response.getText());
 166                 } else if (aclass.equals(GroupResource.class)) {
 167                         result1 = new GroupResource(path);
 168                         result1.createFromJSON(response.getText());
 169                 } else if (aclass.equals(GroupUserResource.class)) {
 170                         result1 = new GroupUserResource(path);
 171                         result1.createFromJSON(response.getText());
 172                 } else if (aclass.equals(UserResource.class)) {
 173                         result1 = new UserResource(path);
 174                         result1.createFromJSON(response.getText());
 175                 }
 176                 return result1;
 177         }
 178
 179         public boolean hasErrors(){
 180                 return errors.size() >0;
 181         }
 182
 183         /**
 184          * Retrieve the errors.
 185          *
 186          * @return the errors
 187          */
 188         public Map<String, Throwable> getErrors() {
 189                 return errors;
 190         }
 191
 192         public void debug(){
 193                 GWT.log("--->"+result.size(), null);
 194                 GWT.log("-ERRORS-->"+getErrors().size(), null);
 195                 for(String p : getErrors().keySet())
 196                         GWT.log("error:"+p, getErrors().get(p));
 197         }
 198 }