added user search resource

scm-webapp/src/main/java/sonia/scm/user/xml/XmlUserManager.java

@@ -44,6 +44,8 @@ import org.slf4j.LoggerFactory;
 
 import sonia.scm.HandlerEvent;
 import sonia.scm.SCMContextProvider;
+import sonia.scm.search.SearchRequest;
+import sonia.scm.search.SearchUtil;
 import sonia.scm.security.ScmSecurityException;
 import sonia.scm.store.Store;
 import sonia.scm.store.StoreFactory;
@@ -62,8 +64,11 @@ import sonia.scm.web.security.WebSecurityContext;
 import java.io.IOException;
 import java.io.InputStream;
 
+import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Iterator;
 import java.util.LinkedList;
+import java.util.List;
 
 import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
@@ -319,6 +324,47 @@ public class XmlUserManager extends AbstractUserManager
     fresh.copyProperties(user);
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param searchRequest
+   *
+   * @return
+   */
+  @Override
+  public Collection<User> search(final SearchRequest searchRequest)
+  {
+    List<User> users = new ArrayList<User>();
+    int index = 0;
+    int counter = 0;
+    Iterator<User> it = userDB.values().iterator();
+
+    while (it.hasNext())
+    {
+      User user = it.next();
+
+      if (SearchUtil.matchesOne(searchRequest, user.getName(),
+                                user.getDisplayName(), user.getMail()))
+      {
+        index++;
+
+        if (searchRequest.getStartWith() <= index)
+        {
+          users.add(user.clone());
+          counter++;
+
+          if (searchRequest.getMaxResults() <= counter)
+          {
+            break;
+          }
+        }
+      }
+    }
+
+    return users;
+  }
+
   //~--- get methods ----------------------------------------------------------
 
   /**