2 * Copyright 2011 GRNET S.A. All rights reserved.
4 * Redistribution and use in source and binary forms, with or
5 * without modification, are permitted provided that the following
8 * 1. Redistributions of source code must retain the above
9 * copyright notice, this list of conditions and the following
12 * 2. Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
24 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
30 * The views and conclusions contained in the software and
31 * documentation are those of the authors and should not be
32 * interpreted as representing official policies, either expressed
33 * or implied, of GRNET S.A.
36 package gr.grnet.pithos.web.client.rest;
38 import com.google.gwt.core.client.GWT;
39 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
40 import com.google.gwt.http.client.Request;
41 import com.google.gwt.http.client.RequestBuilder;
42 import com.google.gwt.http.client.RequestException;
43 import com.google.gwt.http.client.Response;
44 import gr.grnet.pithos.web.client.foldertree.Resource;
45 import java.util.HashMap;
48 public abstract class GetRequest<T extends Resource> implements ScheduledCommand {
50 private Class<T> aClass;
56 private String username;
62 private Map<String, String> headers = new HashMap<String, String>();
64 public abstract void onSuccess(T result);
66 public abstract void onError(Throwable t);
68 public GetRequest(Class<T> aClass, String path, int okCode, T result) {
75 public GetRequest(Class<T> aClass, String path) {
76 this(aClass, path, -1, null);
79 public GetRequest(Class<T> aClass, String path, T result) {
80 this(aClass, path, -1, result);
84 public void execute() {
85 RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
86 for (String header : headers.keySet()) {
87 builder.setHeader("If-Modified-Since", "0");
88 builder.setHeader(header, headers.get(header));
91 builder.sendRequest("", new RestRequestCallback<T>(path, okCode) {
93 public void onSuccess(T object) {
94 GetRequest.this.onSuccess(object);
98 public T deserialize(Response response) {
99 return Resource.createFromResponse(aClass, response, result);
103 public void onError(Request request, Throwable throwable) {
104 if (throwable instanceof RestException) {
105 if (((RestException) throwable).getHttpStatusCode() == 304 && cached != null){
106 GWT.log("Using cache: " + cached.toString(), null);
111 GetRequest.this.onError(throwable);
115 catch (RequestException e) {
119 public void setHeader(String header, String value) {
120 headers.put(header, value);