Added multiparameter functionallity

src/main/java/org/scribe/extractors/BaseStringExtractorImpl.java

@@ -22,10 +22,10 @@ public class BaseStringExtractorImpl implements BaseStringExtractor
 
   private String getSortedAndEncodedParams(OAuthRequest request)
   {
-    Map<String, String> params = new HashMap<String, String>();
+    Map<String, List<String>> params = new HashMap<String, List<String>>();
     params.putAll(request.getQueryStringParams());
     params.putAll(request.getBodyParams());
-    params.putAll(request.getOauthParameters());
+    params.putAll(MapUtils.toListMap(request.getOauthParameters()));
     params = MapUtils.sort(params);
     return URLUtils.percentEncode(URLUtils.formURLEncodeMap(params));
   }

src/main/java/org/scribe/model/Request.java

@@ -19,7 +19,7 @@ class Request
 
   private String url;
   private Verb verb;
-  private Map<String, String> bodyParams;
+  private Map<String, List<String>> bodyParams;
   private Map<String, String> headers;
   private String payload = null;
   private Integer timeout = null;
@@ -35,7 +35,7 @@ class Request
   {
     this.verb = verb;
     this.url = url;
-    this.bodyParams = new HashMap<String, String>();
+    this.bodyParams = new HashMap<String, List<String>>();
     this.headers = new HashMap<String, String>();
     try
     {
@@ -108,7 +108,14 @@ class Request
    */
   public void addBodyParameter(String key, String value)
   {
-    this.bodyParams.put(key, value);
+    if(bodyParams.get(key) != null)
+    {
+      bodyParams.get(key).add(value);
+    }
+    else
+    {
+      bodyParams.put(key, Arrays.asList(value));
+    }
   }
 
   /**
@@ -131,18 +138,26 @@ class Request
    * 
    * @return a map containing the query string parameters
    */
-  public Map<String, String> getQueryStringParams()
+  public Map<String, List<String>> getQueryStringParams()
   {
     try
     {
-      Map<String, String> params = new HashMap<String, String>();
+      Map<String, List<String>> params = new HashMap<String, List<String>>();
       String query = new URL(url).getQuery();
       if (query != null)
       {
         for (String param : query.split("&"))
         {
           String pair[] = param.split("=");
-          params.put(pair[0], pair[1]);
+          String key = pair[0], value = pair[1];
+          if(params.get(key)!= null)
+          {
+            params.get(key).add(value);
+          }
+          else
+          {
+            params.put(key, Arrays.asList(value));
+          }
         }
       }
       return params;
@@ -157,7 +172,7 @@ class Request
    * 
    * @return a map containing the body parameters.
    */
-  public Map<String, String> getBodyParams()
+  public Map<String, List<String>> getBodyParams()
   {
     return bodyParams;
   }

src/main/java/org/scribe/utils/MapUtils.java

@@ -5,22 +5,39 @@ import java.util.*;
 public class MapUtils
 {
 
-  public static final Map<String, String> sort(Map<String, String> map)
+  public static final Map<String, List<String>> sort(Map<String, List<String>> map)
   {
     Preconditions.checkNotNull(map, "Cannot sort a null object.");
 
-    Map<String, String> sorted = new LinkedHashMap<String, String>();
+    Map<String, List<String>> sorted = new LinkedHashMap<String, List<String>>();
     for (String key : getSortedKeys(map))
     {
+      if(map.get(key).size() > 1)
+      {
+        Collections.sort(map.get(key));
+      }
       sorted.put(key, map.get(key));
     }
     return sorted;
   }
 
-  private static List<String> getSortedKeys(Map<String, String> map)
+  private static List<String> getSortedKeys(Map<String, List<String>> map)
   {
     List<String> keys = new ArrayList<String>(map.keySet());
     Collections.sort(keys);
     return keys;
   }
+
+  @SuppressWarnings("unchecked")
+  public static final <T> Map<String, List<T>> toListMap(Map<String, T> map)
+  {
+    Preconditions.checkNotNull(map, "Cannot sort a null object.");
+
+    Map<String, List<T>> result = new HashMap<String, List<T>>();
+    for (Map.Entry<String, T> entry : map.entrySet())
+    {
+      result.put(entry.getKey(), Arrays.asList(entry.getValue()));
+    }
+    return result;
+  }
 }

src/main/java/org/scribe/utils/URLUtils.java

@@ -16,18 +16,21 @@ public class URLUtils
 
   private static final String ERROR_MSG = String.format("Cannot find specified encoding: %s", UTF_8);
 
-  public static String formURLEncodeMap(Map<String, String> map)
+  public static String formURLEncodeMap(Map<String, List<String>> map)
   {
     Preconditions.checkNotNull(map, "Cannot url-encode a null object");
     return (map.size() <= 0) ? EMPTY_STRING : doFormUrlEncode(map);
   }
 
-  private static String doFormUrlEncode(Map<String, String> map)
+  private static String doFormUrlEncode(Map<String, List<String>> map)
   {
     StringBuffer encodedString = new StringBuffer();
     for (String key : map.keySet())
     {
-      encodedString.append(percentEncode(key)).append(PAIR_SEPARATOR).append(percentEncode(map.get(key))).append(PARAM_SEPARATOR);
+      for(String value: map.get(key))
+      {
+        encodedString.append(percentEncode(key)).append(PAIR_SEPARATOR).append(percentEncode(value)).append(PARAM_SEPARATOR);  
+      }
     }
     return removeTrailingSeparator(encodedString);
   }

src/test/java/org/scribe/utils/MapUtilsTest.java

@@ -9,40 +9,42 @@ import org.junit.*;
 public class MapUtilsTest
 {
 
-  private Map<String, String> unsorted;
+  private Map<String, List<String>> unsorted;
 
   @Before
   public void setup()
   {
-    unsorted = new LinkedHashMap<String, String>();
+    unsorted = new LinkedHashMap<String, List<String>>();
-    unsorted.put("d", "fourth");
+    unsorted.put("d", Arrays.asList("fourth"));
-    unsorted.put("a", "first");
+    unsorted.put("a", Arrays.asList("first"));
-    unsorted.put("c", "third");
+    unsorted.put("c", Arrays.asList("third"));
-    unsorted.put("b", "second");
+    unsorted.put("b", Arrays.asList("second", "second_two", "second_one"));
   }
 
   @Test
   public void shouldSortMap()
   {
-    Map<String, String> sorted = MapUtils.sort(unsorted);
+    Map<String, List<String>> sorted = MapUtils.sort(unsorted);
-    List<String> values = new ArrayList<String>(sorted.values());
+    List<List<String>> values = new ArrayList<List<String>>(sorted.values());
-    assertEquals("first", values.get(0));
+    assertEquals("first", values.get(0).get(0));
-    assertEquals("second", values.get(1));
+    assertEquals("second", values.get(1).get(0));
-    assertEquals("third", values.get(2));
+    assertEquals("second_one", values.get(1).get(1));
-    assertEquals("fourth", values.get(3));
+    assertEquals("second_two", values.get(1).get(2));    
+    assertEquals("third", values.get(2).get(0));
+    assertEquals("fourth", values.get(3).get(0));
   }
 
   @Test
   public void shouldNotModifyTheOriginalMap()
   {
-    Map<String, String> sorted = MapUtils.sort(unsorted);
+    Map<String, List<String>> sorted = MapUtils.sort(unsorted);
     assertNotSame(sorted, unsorted);
 
-    List<String> values = new ArrayList<String>(unsorted.values());
+    List<List<String>> values = new ArrayList<List<String>>(unsorted.values());
-    assertEquals("fourth", values.get(0));
+    assertEquals("fourth", values.get(0).get(0));
-    assertEquals("first", values.get(1));
+    assertEquals("first", values.get(1).get(0));
-    assertEquals("third", values.get(2));
+    assertEquals("third", values.get(2).get(0));
-    assertEquals("second", values.get(3));
+    assertEquals("second", values.get(3).get(0));
   }
 
   @Test(expected = IllegalArgumentException.class)

src/test/java/org/scribe/utils/URLUtilsTest.java

@@ -18,10 +18,10 @@ public class URLUtilsTest
   @Test
   public void shouldPercentEncodeMap()
   {
-    Map<String, String> params = new LinkedHashMap<String, String>();
+    Map<String, List<String>> params = new LinkedHashMap<String, List<String>>();
-    params.put("key", "value");
+    params.put("key", Arrays.asList("value"));
-    params.put("key with spaces", "value with spaces");
+    params.put("key with spaces", Arrays.asList("value with spaces"));
-    params.put("&symbols!", "#!");
+    params.put("&symbols!", Arrays.asList("#!"));
 
     String expected = "key=value&key+with+spaces=value+with+spaces&%26symbols%21=%23%21";
     assertEquals(expected, URLUtils.formURLEncodeMap(params));
@@ -30,7 +30,7 @@ public class URLUtilsTest
   @Test
   public void shouldReturnEmptyStringForEmptyMap()
   {
-    Map<String, String> params = new LinkedHashMap<String, String>();
+    Map<String, List<String>> params = new LinkedHashMap<String, List<String>>();
     String expected = "";
     assertEquals(expected, URLUtils.formURLEncodeMap(params));
   }
@@ -54,7 +54,7 @@ public class URLUtilsTest
   @Test(expected = IllegalArgumentException.class)
   public void shouldThrowExceptionIfMapIsNull()
   {
-    Map<String, String> nullMap = null;
+    Map<String, List<String>> nullMap = null;
     URLUtils.formURLEncodeMap(nullMap);
   }