root / src / gr / ebs / gss / web / client / rest / HeadCommand.java @ af6aa461
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1 | a52ea5e4 | pastith | /*
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2 | a52ea5e4 | pastith | * Copyright 2009 Electronic Business Systems Ltd.
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3 | a52ea5e4 | pastith | *
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4 | a52ea5e4 | pastith | * This file is part of GSS.
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5 | a52ea5e4 | pastith | *
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6 | a52ea5e4 | pastith | * GSS is free software: you can redistribute it and/or modify
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7 | a52ea5e4 | pastith | * it under the terms of the GNU General Public License as published by
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8 | a52ea5e4 | pastith | * the Free Software Foundation, either version 3 of the License, or
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9 | a52ea5e4 | pastith | * (at your option) any later version.
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10 | a52ea5e4 | pastith | *
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11 | a52ea5e4 | pastith | * GSS is distributed in the hope that it will be useful,
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12 | a52ea5e4 | pastith | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a52ea5e4 | pastith | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | a52ea5e4 | pastith | * GNU General Public License for more details.
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15 | a52ea5e4 | pastith | *
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16 | a52ea5e4 | pastith | * You should have received a copy of the GNU General Public License
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17 | a52ea5e4 | pastith | * along with GSS. If not, see <http://www.gnu.org/licenses/>.
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18 | a52ea5e4 | pastith | */
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19 | af6aa461 | Christos V. Stathis | package gr.ebs.gss.web.client.rest; |
20 | a52ea5e4 | pastith | |
21 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.GSS; |
22 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.common.exceptions.ObjectNotFoundException; |
23 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.rest.resource.FileResource; |
24 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.rest.resource.FolderResource; |
25 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.rest.resource.GroupResource; |
26 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.rest.resource.GroupUserResource; |
27 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.rest.resource.GroupsResource; |
28 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.rest.resource.RestResource; |
29 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.rest.resource.SharedResource; |
30 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.rest.resource.TrashResource; |
31 | af6aa461 | Christos V. Stathis | import gr.ebs.gss.web.client.rest.resource.UserResource; |
32 | a52ea5e4 | pastith | |
33 | 62f168b2 | Giannis Koutsoubos | import com.google.gwt.core.client.GWT; |
34 | a52ea5e4 | pastith | import com.google.gwt.http.client.Request; |
35 | 023f6f1e | Panagiotis Astithas | import com.google.gwt.http.client.RequestBuilder; |
36 | a52ea5e4 | pastith | import com.google.gwt.http.client.Response; |
37 | a52ea5e4 | pastith | |
38 | a52ea5e4 | pastith | |
39 | a52ea5e4 | pastith | /**
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40 | a52ea5e4 | pastith | * @author kman
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41 | a52ea5e4 | pastith | *
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42 | a52ea5e4 | pastith | */
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43 | 86c951b2 | Panagiotis Astithas | public abstract class HeadCommand<T extends RestResource> extends RestCommand{ |
44 | a52ea5e4 | pastith | |
45 | a52ea5e4 | pastith | boolean complete = false; |
46 | a52ea5e4 | pastith | T result = null;
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47 | a52ea5e4 | pastith | Class<T> aclass;
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48 | 62f168b2 | Giannis Koutsoubos | private boolean requestSent = false; |
49 | 62f168b2 | Giannis Koutsoubos | T cached; |
50 | 62f168b2 | Giannis Koutsoubos | final String path; |
51 | 86c951b2 | Panagiotis Astithas | |
52 | 86c951b2 | Panagiotis Astithas | public HeadCommand(Class<T> theclass, String pathToGet, T theCached){ |
53 | 86c951b2 | Panagiotis Astithas | this(theclass, pathToGet, true, theCached); |
54 | aa8608d3 | koutsoub | } |
55 | 86c951b2 | Panagiotis Astithas | |
56 | 86c951b2 | Panagiotis Astithas | public HeadCommand(Class<T> theClass, String pathToGet, boolean showLoading, T theCached){ |
57 | aa8608d3 | koutsoub | setShowLoadingIndicator(showLoading); |
58 | 86c951b2 | Panagiotis Astithas | this.aclass = theClass;
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59 | aa8608d3 | koutsoub | if(isShowLoadingIndicator())
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60 | aa8608d3 | koutsoub | GSS.get().showLoadingIndicator(); |
61 | 62f168b2 | Giannis Koutsoubos | |
62 | 86c951b2 | Panagiotis Astithas | if(theClass.equals(FileResource.class))
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63 | a52ea5e4 | pastith | path = pathToGet; |
64 | a52ea5e4 | pastith | else
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65 | a52ea5e4 | pastith | path = fixPath(pathToGet); |
66 | 86c951b2 | Panagiotis Astithas | this.cached = theCached;
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67 | a52ea5e4 | pastith | |
68 | 62f168b2 | Giannis Koutsoubos | } |
69 | 62f168b2 | Giannis Koutsoubos | |
70 | 62f168b2 | Giannis Koutsoubos | private void sendRequest(){ |
71 | 62f168b2 | Giannis Koutsoubos | if(requestSent)
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72 | 62f168b2 | Giannis Koutsoubos | return;
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73 | 62f168b2 | Giannis Koutsoubos | requestSent=true;
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74 | 023f6f1e | Panagiotis Astithas | RequestBuilder builder = new RequestBuilder(RequestBuilder.HEAD, path);
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75 | 62f168b2 | Giannis Koutsoubos | if(cached!=null && cached.getLastModifiedSince() != null){ |
76 | 62f168b2 | Giannis Koutsoubos | GWT.log("ADDING IF MODIFIED HEADERS", null); |
77 | 62f168b2 | Giannis Koutsoubos | builder.setHeader("If-Modified-Since", cached.getLastModifiedSince());
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78 | 62f168b2 | Giannis Koutsoubos | } |
79 | a52ea5e4 | pastith | try {
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80 | a52ea5e4 | pastith | handleHeaders(builder, path); |
81 | a52ea5e4 | pastith | builder.sendRequest("", new RestCallback(path) { |
82 | a52ea5e4 | pastith | |
83 | 86c951b2 | Panagiotis Astithas | @Override
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84 | a52ea5e4 | pastith | public Object deserialize(Response response) { |
85 | a52ea5e4 | pastith | return deserializeResponse(path, response);
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86 | a52ea5e4 | pastith | } |
87 | a52ea5e4 | pastith | |
88 | 86c951b2 | Panagiotis Astithas | @Override
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89 | a52ea5e4 | pastith | public void handleError(Request request, Throwable exception) { |
90 | 62f168b2 | Giannis Koutsoubos | if(exception instanceof RestException) |
91 | 62f168b2 | Giannis Koutsoubos | if(((RestException)exception).getHttpStatusCode() == 304 && cached != null){ |
92 | 62f168b2 | Giannis Koutsoubos | GWT.log("Using cache:"+cached.getUri(), null); |
93 | 62f168b2 | Giannis Koutsoubos | handleSuccess(cached); |
94 | 62f168b2 | Giannis Koutsoubos | return;
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95 | 62f168b2 | Giannis Koutsoubos | } |
96 | a52ea5e4 | pastith | complete = true;
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97 | 895035a2 | pastith | HeadCommand.this.onError(exception); |
98 | a52ea5e4 | pastith | } |
99 | a52ea5e4 | pastith | |
100 | 86c951b2 | Panagiotis Astithas | @Override
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101 | a52ea5e4 | pastith | public void handleSuccess(Object object) { |
102 | a52ea5e4 | pastith | result = (T) object; |
103 | a52ea5e4 | pastith | complete = true;
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104 | a52ea5e4 | pastith | } |
105 | a52ea5e4 | pastith | |
106 | a52ea5e4 | pastith | }); |
107 | a52ea5e4 | pastith | } catch (Exception ex) { |
108 | a52ea5e4 | pastith | complete = true;
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109 | a52ea5e4 | pastith | onError(ex); |
110 | a52ea5e4 | pastith | } |
111 | a52ea5e4 | pastith | } |
112 | a52ea5e4 | pastith | |
113 | a52ea5e4 | pastith | public boolean isComplete() { |
114 | a52ea5e4 | pastith | return complete;
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115 | a52ea5e4 | pastith | } |
116 | a52ea5e4 | pastith | |
117 | a52ea5e4 | pastith | public T getResult(){
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118 | a52ea5e4 | pastith | return result;
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119 | a52ea5e4 | pastith | } |
120 | a52ea5e4 | pastith | |
121 | 023f6f1e | Panagiotis Astithas | @Override
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122 | a52ea5e4 | pastith | public boolean execute() { |
123 | 62f168b2 | Giannis Koutsoubos | if(!requestSent)
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124 | 62f168b2 | Giannis Koutsoubos | sendRequest(); |
125 | a52ea5e4 | pastith | boolean com = isComplete();
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126 | a52ea5e4 | pastith | if(com){
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127 | aa8608d3 | koutsoub | if(isShowLoadingIndicator())
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128 | aa8608d3 | koutsoub | GSS.get().hideLoadingIndicator(); |
129 | a52ea5e4 | pastith | if(getResult() != null) |
130 | a52ea5e4 | pastith | onComplete(); |
131 | a52ea5e4 | pastith | else
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132 | a52ea5e4 | pastith | onError(new ObjectNotFoundException("Resource Not Found")); |
133 | a52ea5e4 | pastith | return false; |
134 | a52ea5e4 | pastith | } |
135 | a52ea5e4 | pastith | return true; |
136 | a52ea5e4 | pastith | } |
137 | a52ea5e4 | pastith | |
138 | 86c951b2 | Panagiotis Astithas | public Object deserializeResponse(String aPath, Response response){ |
139 | a52ea5e4 | pastith | RestResource result1 = null;
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140 | a52ea5e4 | pastith | if(aclass.equals(FolderResource.class)){
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141 | 86c951b2 | Panagiotis Astithas | result1 = new FolderResource(aPath);
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142 | a52ea5e4 | pastith | result1.createFromJSON(response.getText()); |
143 | a52ea5e4 | pastith | |
144 | a52ea5e4 | pastith | } |
145 | a52ea5e4 | pastith | else if(aclass.equals(FileResource.class)){ |
146 | 86c951b2 | Panagiotis Astithas | result1 = new FileResource(aPath);
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147 | a52ea5e4 | pastith | result1.createFromJSON(response.getHeader("X-GSS-Metadata"));
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148 | a52ea5e4 | pastith | } |
149 | a52ea5e4 | pastith | else if(aclass.equals(GroupsResource.class)){ |
150 | 86c951b2 | Panagiotis Astithas | result1 = new GroupsResource(aPath);
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151 | a52ea5e4 | pastith | result1.createFromJSON(response.getText()); |
152 | a52ea5e4 | pastith | } |
153 | a52ea5e4 | pastith | else if(aclass.equals(TrashResource.class)){ |
154 | 86c951b2 | Panagiotis Astithas | result1 = new TrashResource(aPath);
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155 | a52ea5e4 | pastith | result1.createFromJSON(response.getText()); |
156 | a52ea5e4 | pastith | |
157 | a52ea5e4 | pastith | } |
158 | a52ea5e4 | pastith | else if(aclass.equals(SharedResource.class)){ |
159 | 86c951b2 | Panagiotis Astithas | result1 = new SharedResource(aPath);
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160 | a52ea5e4 | pastith | result1.createFromJSON(response.getText()); |
161 | a52ea5e4 | pastith | |
162 | a52ea5e4 | pastith | } |
163 | a52ea5e4 | pastith | else if(aclass.equals(GroupResource.class)){ |
164 | 86c951b2 | Panagiotis Astithas | result1 = new GroupResource(aPath);
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165 | a52ea5e4 | pastith | result1.createFromJSON(response.getText()); |
166 | a52ea5e4 | pastith | |
167 | a52ea5e4 | pastith | } |
168 | a52ea5e4 | pastith | else if(aclass.equals(GroupUserResource.class)){ |
169 | 86c951b2 | Panagiotis Astithas | result1 = new GroupUserResource(aPath);
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170 | a52ea5e4 | pastith | result1.createFromJSON(response.getText()); |
171 | a52ea5e4 | pastith | |
172 | a52ea5e4 | pastith | } |
173 | a52ea5e4 | pastith | else if(aclass.equals(UserResource.class)){ |
174 | 86c951b2 | Panagiotis Astithas | result1 = new UserResource(aPath);
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175 | a52ea5e4 | pastith | result1.createFromJSON(response.getText()); |
176 | a52ea5e4 | pastith | |
177 | a52ea5e4 | pastith | } |
178 | a52ea5e4 | pastith | return result1;
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179 | a52ea5e4 | pastith | } |
180 | a52ea5e4 | pastith | } |