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.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.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.Request;
  40 import com.google.gwt.http.client.Response;
  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
  53         public MultipleHeadCommand(Class<T> aclass, String[] pathToGet){
  54                 this(aclass, pathToGet, true);
  55         }
  56
  57         public MultipleHeadCommand(Class<T> aclass, String[] pathToGet, boolean showLoading){
  58                 setShowLoadingIndicator(showLoading);
  59                 if(isShowLoadingIndicator())
  60                         GSS.get().showLoadingIndicator();
  61                 paths = pathToGet;
  62                 this.aclass = aclass;
  63                 for (String pathg : pathToGet) {
  64                         final String path;
  65                         if(aclass.equals(FileResource.class))
  66                                 path = pathg;
  67                         else
  68                                 path = fixPath(pathg);
  69                         RestRequestBuilder builder = new RestRequestBuilder("HEAD", path);
  70
  71                         try {
  72                                 handleHeaders(builder, path);
  73                                 builder.sendRequest("", new RestCallback(path) {
  74
  75                                         public Object deserialize(Response response) {
  76                                                 return deserializeResponse(path, response);
  77                                         }
  78
  79                                         public void handleError(Request request, Throwable exception) {
  80                                                 errors.put(path, exception);
  81                                         }
  82
  83                                         public void handleSuccess(Object object) {
  84                                                 if(object!= null)
  85                                                         result.add((T)object);
  86                                                 else
  87                                                         errors.put(path, new ObjectNotFoundException("resource not found"));
  88
  89
  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                 return result;
 105         }
 106
 107         public boolean execute() {
 108                 boolean com = isComplete();
 109                 if (com) {
 110                         if(isShowLoadingIndicator())
 111                                 GSS.get().hideLoadingIndicator();
 112                         if(hasErrors())
 113                                 for(String p : errors.keySet())
 114                                         onError(p, errors.get(p));
 115                         onComplete();
 116                         return false;
 117                 }
 118                 return true;
 119         }
 120
 121         /**
 122          * @param p
 123          * @param throwable
 124          */
 125         public abstract void onError(String p, Throwable throwable);
 126
 127         public Object deserializeResponse(String path, Response response) {
 128                 RestResource result1 = null;
 129                 if (aclass.equals(FolderResource.class)) {
 130                         result1 = new FolderResource(path);
 131                         result1.createFromJSON(response.getText());
 132
 133                 } else if (aclass.equals(FileResource.class)) {
 134                         result1 = new FileResource(path);
 135                         result1.createFromJSON(response.getHeader("X-GSS-Metadata"));
 136                 } else if (aclass.equals(GroupsResource.class)) {
 137                         result1 = new GroupsResource(path);
 138                         result1.createFromJSON(response.getText());
 139                 } else if (aclass.equals(TrashResource.class)) {
 140                         result1 = new TrashResource(path);
 141                         result1.createFromJSON(response.getText());
 142
 143                 } else if (aclass.equals(SharedResource.class)) {
 144                         result1 = new SharedResource(path);
 145                         result1.createFromJSON(response.getText());
 146
 147                 } else if (aclass.equals(GroupResource.class)) {
 148                         result1 = new GroupResource(path);
 149                         result1.createFromJSON(response.getText());
 150
 151                 } else if (aclass.equals(GroupUserResource.class)) {
 152                         result1 = new GroupUserResource(path);
 153                         result1.createFromJSON(response.getText());
 154
 155                 } else if (aclass.equals(UserResource.class)) {
 156                         result1 = new UserResource(path);
 157                         result1.createFromJSON(response.getText());
 158
 159                 }
 160                 return result1;
 161
 162         }
 163
 164         public boolean hasErrors(){
 165                 return errors.size() >0;
 166         }
 167
 168
 169         /**
 170          * Retrieve the errors.
 171          *
 172          * @return the errors
 173          */
 174         public Map<String, Throwable> getErrors() {
 175                 return errors;
 176         }
 177
 178         public void debug(){
 179                 GWT.log("--->"+result.size(), null);
 180                 GWT.log("-ERRORS-->"+getErrors().size(), null);
 181                 for(String p : getErrors().keySet())
 182                         GWT.log("error:"+p, getErrors().get(p));
 183         }
 184 }