code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/Helpers.java

   1 package gr.grnet.pithos.web.client;
   2
   3 import com.google.gwt.http.client.Header;
   4 import com.google.gwt.http.client.RequestBuilder;
   5 import com.google.gwt.http.client.Response;
   6 import com.google.gwt.json.client.JSONArray;
   7 import com.google.gwt.json.client.JSONString;
   8
   9 import java.util.*;
  10
  11 /**
  12  * Helper methods.
  13  */
  14 public final class Helpers {
  15     private Helpers() {}
  16
  17     public static boolean isEmptySafe(CharSequence s) {
  18         return s == null || s.length() == 0;
  19     }
  20
  21     public static <K, V> HashMap<K, V> copyHashMap(HashMap<K, V> map) {
  22         assert map != null;
  23         return new HashMap<K, V>(map);
  24     }
  25
  26     public static <T> List<T> safeList(List<T> list) {
  27         if(list == null) {
  28             return new ArrayList<T>();
  29         }
  30         return list;
  31     }
  32
  33     public static <T> List<T> toList(T ...items) {
  34         final List<T> list = new ArrayList<T>();
  35         Collections.addAll(list, items);
  36         return list;
  37     }
  38
  39     public static JSONArray listToJSONArray(List<String> list) {
  40         final JSONArray jsonArray = new JSONArray();
  41         if(list == null) {
  42             return jsonArray;
  43         }
  44
  45         for(int i = 0; i < list.size(); i++) {
  46             final JSONString jsonString = new JSONString(list.get(i));
  47             jsonArray.set(i, jsonString);
  48         }
  49
  50         return jsonArray;
  51     }
  52
  53     public static String stripTrailing(String s, String trailing) {
  54         while(s.endsWith(trailing)) {
  55             s = s.substring(0, s.length() - trailing.length());
  56         }
  57         return s;
  58     }
  59
  60     public static String upToIncludingLastPart(String s, String part) {
  61         int index = s.lastIndexOf(part);
  62         if(index == -1) {
  63             return s;
  64         }
  65         return s.substring(0, index + part.length());
  66     }
  67
  68     public static void setHeaders(RequestBuilder builder, Map<String, String> headers) {
  69         for (String headerName : headers.keySet()) {
  70             final String headerValue = headers.get(headerName);
  71             builder.setHeader(headerName, headerValue);
  72
  73             if(Pithos.IsDetailedHTTPLOGEnabled) {
  74                 if(!Pithos.HTTPHeadersToIgnoreInLOG.contains(headerName)) {
  75                     Pithos.LOG("  ==> ", headerName, ": ", headerValue);
  76                 }
  77             }
  78         }
  79     }
  80
  81     public static void LOGResponse(Response response) {
  82         if(Pithos.IsDetailedHTTPLOGEnabled) {
  83             try {
  84                 final int statusCode = response.getStatusCode();
  85                 final String statusText = response.getStatusText();
  86                 Pithos.LOG("  ", statusCode, " ", statusText);
  87
  88                 final String body = response.getText();
  89                 if(body != null && body.trim().length() > 0) {
  90                     final String s = body.trim().substring(0, 120);
  91                     Pithos.LOG(body, body.length() <= 120 ? "" : " ...");
  92                 }
  93
  94                 final Header[] headers = response.getHeaders();
  95                 for(Header header : headers) {
  96                     final String headerName = header.getName();
  97                     final String headerValue = header.getValue();
  98                     if(!Pithos.HTTPHeadersToIgnoreInLOG.contains(headerName)) {
  99                         Pithos.LOG("  <== ", headerName, ": ", headerValue);
 100                     }
 101                 }
 102             }
 103             catch(Exception e) {
 104                 Pithos.LOG("ERROR trying to log response", e);
 105             }
 106         }
 107     }
 108
 109     public static native void copyToClipboardFrom(com.google.gwt.user.client.Element element) /*-{
 110       $wnd.window.clipboardData.setData('text', element);
 111     }-*/;
 112 }