refactor: replace verbose checks with String.IsNullOrEmpty where applicable.

Thanks to Kira for this patch from http://opensimulator.org/mantis/view.php?id=6845

18 files changed, 31 insertions, 33 deletions

diff --git a/OpenSim/Region/Application/OpenSimBase.cs b/OpenSim/Region/Application/OpenSimBase.cs
index b032e7f..308638c 100644
--- a/OpenSim/Region/Application/OpenSimBase.cs
+++ b/OpenSim/Region/Application/OpenSimBase.cs
@@ -908,7 +908,7 @@ namespace OpenSim
             regInfo.EstateSettings = EstateDataService.LoadEstateSettings(regInfo.RegionID, true);
 
             string newName;
-            if (estateName != null && estateName != "")
+            if (!string.IsNullOrEmpty(estateName))
                 newName = estateName;
             else
                 newName = MainConsole.Instance.CmdPrompt("New estate name", regInfo.EstateSettings.EstateName);
diff --git a/OpenSim/Region/CoreModules/Avatar/Inventory/Archiver/InventoryArchiveReadRequest.cs b/OpenSim/Region/CoreModules/Avatar/Inventory/Archiver/InventoryArchiveReadRequest.cs
index 31c42d8..f7057fe 100644
--- a/OpenSim/Region/CoreModules/Avatar/Inventory/Archiver/InventoryArchiveReadRequest.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Inventory/Archiver/InventoryArchiveReadRequest.cs
@@ -421,7 +421,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Inventory.Archiver
                 item.CreatorId = ospResolvedId.ToString();
                 item.CreatorData = string.Empty;
             }
-            else if (item.CreatorData == null || item.CreatorData == String.Empty)
+            else if (string.IsNullOrEmpty(item.CreatorData))
             {
                 item.CreatorId = m_userInfo.PrincipalID.ToString();
 //                item.CreatorIdAsUuid = new UUID(item.CreatorId);
@@ -522,7 +522,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Inventory.Archiver
                         
                         foreach (SceneObjectGroup sog in sceneObjects)
                             foreach (SceneObjectPart sop in sog.Parts)
-                                if (sop.CreatorData == null || sop.CreatorData == "")
+                                if (string.IsNullOrEmpty(sop.CreatorData))
                                     sop.CreatorID = m_creatorIdForAssetId[assetId];
 
                         if (coa != null)
diff --git a/OpenSim/Region/CoreModules/Framework/InventoryAccess/HGAssetMapper.cs b/OpenSim/Region/CoreModules/Framework/InventoryAccess/HGAssetMapper.cs
index 144895c..b7a4d1a 100644
--- a/OpenSim/Region/CoreModules/Framework/InventoryAccess/HGAssetMapper.cs
+++ b/OpenSim/Region/CoreModules/Framework/InventoryAccess/HGAssetMapper.cs
@@ -174,7 +174,7 @@ namespace OpenSim.Region.CoreModules.Framework.InventoryAccess
 
         private void AdjustIdentifiers(AssetMetadata meta)
         {
-            if (meta.CreatorID != null && meta.CreatorID != string.Empty)
+            if (!string.IsNullOrEmpty(meta.CreatorID))
             {
                 UUID uuid = UUID.Zero;
                 UUID.TryParse(meta.CreatorID, out uuid);
diff --git a/OpenSim/Region/CoreModules/Framework/UserManagement/UserManagementModule.cs b/OpenSim/Region/CoreModules/Framework/UserManagement/UserManagementModule.cs
index d3926cc..3fb5195 100644
--- a/OpenSim/Region/CoreModules/Framework/UserManagement/UserManagementModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/UserManagement/UserManagementModule.cs
@@ -466,7 +466,7 @@ namespace OpenSim.Region.CoreModules.Framework.UserManagement
                     return userdata.ServerURLs[serverType].ToString();
                 }
 
-                if (userdata.HomeURL != null && userdata.HomeURL != string.Empty)
+                if (!string.IsNullOrEmpty(userdata.HomeURL))
                 {
                     //m_log.DebugFormat(
                     //    "[USER MANAGEMENT MODULE]: Did not find url type {0} so requesting urls from '{1}' for {2}",
@@ -552,7 +552,7 @@ namespace OpenSim.Region.CoreModules.Framework.UserManagement
 
             if (oldUser != null)
             {
-                if (creatorData == null || creatorData == String.Empty)
+                if (string.IsNullOrEmpty(creatorData))
                 {
                     //ignore updates without creator data
                     return;
diff --git a/OpenSim/Region/CoreModules/Scripting/HttpRequest/ScriptsHttpRequests.cs b/OpenSim/Region/CoreModules/Scripting/HttpRequest/ScriptsHttpRequests.cs
index 1a62405..c3a8afd 100644
--- a/OpenSim/Region/CoreModules/Scripting/HttpRequest/ScriptsHttpRequests.cs
+++ b/OpenSim/Region/CoreModules/Scripting/HttpRequest/ScriptsHttpRequests.cs
@@ -460,9 +460,9 @@ namespace OpenSim.Region.CoreModules.Scripting.HttpRequest
                         Request.Headers.Add(HttpCustomHeaders[i],
                                             HttpCustomHeaders[i+1]);
                 }
-                if (proxyurl != null && proxyurl.Length > 0)
+                if (!string.IsNullOrEmpty(proxyurl))
                 {
-                    if (proxyexcepts != null && proxyexcepts.Length > 0)
+                    if (!string.IsNullOrEmpty(proxyexcepts))
                     {
                         string[] elist = proxyexcepts.Split(';');
                         Request.Proxy = new WebProxy(proxyurl, true, elist);
@@ -483,7 +483,7 @@ namespace OpenSim.Region.CoreModules.Scripting.HttpRequest
                 }
 
                 // Encode outbound data
-                if (OutboundBody != null && OutboundBody.Length > 0)
+                if (!string.IsNullOrEmpty(OutboundBody))
                 {
                     byte[] data = Util.UTF8.GetBytes(OutboundBody);
 
diff --git a/OpenSim/Region/CoreModules/Scripting/LoadImageURL/LoadImageURLModule.cs b/OpenSim/Region/CoreModules/Scripting/LoadImageURL/LoadImageURLModule.cs
index 65737fa..baf9f2f 100644
--- a/OpenSim/Region/CoreModules/Scripting/LoadImageURL/LoadImageURLModule.cs
+++ b/OpenSim/Region/CoreModules/Scripting/LoadImageURL/LoadImageURLModule.cs
@@ -161,9 +161,9 @@ namespace OpenSim.Region.CoreModules.Scripting.LoadImageURL
         {
             WebRequest request = HttpWebRequest.Create(url);
             
-            if (m_proxyurl != null && m_proxyurl.Length > 0) 
+            if (!string.IsNullOrEmpty(m_proxyurl)) 
             {
-                if (m_proxyexcepts != null && m_proxyexcepts.Length > 0) 
+                if (!string.IsNullOrEmpty(m_proxyexcepts)) 
                 {
                     string[] elist = m_proxyexcepts.Split(';');
                     request.Proxy = new WebProxy(m_proxyurl, true, elist);
diff --git a/OpenSim/Region/CoreModules/Scripting/XMLRPC/XMLRPCModule.cs b/OpenSim/Region/CoreModules/Scripting/XMLRPC/XMLRPCModule.cs
index cbffca7..c6e05b1 100644
--- a/OpenSim/Region/CoreModules/Scripting/XMLRPC/XMLRPCModule.cs
+++ b/OpenSim/Region/CoreModules/Scripting/XMLRPC/XMLRPCModule.cs
@@ -677,7 +677,7 @@ namespace OpenSim.Region.CoreModules.Scripting.XMLRPC
             // if not, use as method name
             UUID parseUID;
             string mName = "llRemoteData";
-            if ((Channel != null) && (Channel != ""))
+            if (!string.IsNullOrEmpty(Channel))
                 if (!UUID.TryParse(Channel, out parseUID))
                     mName = Channel;
                 else
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/HGInventoryBroker.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/HGInventoryBroker.cs
index 58576d1..77a3c82 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/HGInventoryBroker.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/HGInventoryBroker.cs
@@ -259,7 +259,7 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Inventory
                 if (sp == null)
                 {
                     inventoryURL = UserManagementModule.GetUserServerURL(userID, "InventoryServerURI");
-                    if (inventoryURL != null && inventoryURL != string.Empty)
+                    if (!string.IsNullOrEmpty(inventoryURL))
                     {
                         inventoryURL = inventoryURL.Trim(new char[] { '/' });
                         m_InventoryURLs.Add(userID, inventoryURL);
diff --git a/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs b/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
index 32d245f..d451b9e 100644
--- a/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
+++ b/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
@@ -464,7 +464,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
                 // or creator data is present.  Otherwise, use the estate owner instead.
                 foreach (SceneObjectPart part in sceneObject.Parts)
                 {
-                    if (part.CreatorData == null || part.CreatorData == string.Empty)
+                    if (string.IsNullOrEmpty(part.CreatorData))
                     {
                         if (!ResolveUserUuid(scene, part.CreatorID))
                             part.CreatorID = scene.RegionInfo.EstateSettings.EstateOwner;
@@ -498,7 +498,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
                                 kvp.Value.OwnerID = scene.RegionInfo.EstateSettings.EstateOwner;
                             }
 
-                            if (kvp.Value.CreatorData == null || kvp.Value.CreatorData == string.Empty)
+                            if (string.IsNullOrEmpty(kvp.Value.CreatorData))
                             {
                                 if (!ResolveUserUuid(scene, kvp.Value.CreatorID))
                                     kvp.Value.CreatorID = scene.RegionInfo.EstateSettings.EstateOwner;
diff --git a/OpenSim/Region/DataSnapshot/DataSnapshotManager.cs b/OpenSim/Region/DataSnapshot/DataSnapshotManager.cs
index dd48dd5..0c0a7aa 100644
--- a/OpenSim/Region/DataSnapshot/DataSnapshotManager.cs
+++ b/OpenSim/Region/DataSnapshot/DataSnapshotManager.cs
@@ -307,7 +307,7 @@ namespace OpenSim.Region.DataSnapshot
             XmlNode regiondata = requestedSnap.CreateNode(XmlNodeType.Element, "regiondata", "");
             try
             {
-                if (regionName == null || regionName == "")
+                if (string.IsNullOrEmpty(regionName))
                 {
                     XmlNode timerblock = requestedSnap.CreateNode(XmlNodeType.Element, "expire", "");
                     timerblock.InnerText = m_period.ToString();
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index 9e6c25d..dcbb509 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -473,7 +473,7 @@ namespace OpenSim.Region.Framework.Scenes
         {
             get
             {
-                if (CreatorData != null && CreatorData != string.Empty)
+                if (!string.IsNullOrEmpty(CreatorData))
                     return CreatorID.ToString() + ';' + CreatorData;
                 else
                     return CreatorID.ToString();
diff --git a/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs b/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs
index 3ea936c..f07dee9 100644
--- a/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs
+++ b/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs
@@ -1223,7 +1223,7 @@ namespace OpenSim.Region.Framework.Scenes.Serialization
 
             WriteUUID(writer, "CreatorID", sop.CreatorID, options);
 
-            if (sop.CreatorData != null && sop.CreatorData != string.Empty)
+            if (!string.IsNullOrEmpty(sop.CreatorData))
                 writer.WriteElementString("CreatorData", sop.CreatorData);
             else if (options.ContainsKey("home"))
             {
@@ -1396,7 +1396,7 @@ namespace OpenSim.Region.Framework.Scenes.Serialization
 
                     WriteUUID(writer, "CreatorID", item.CreatorID, options);
 
-                    if (item.CreatorData != null && item.CreatorData != string.Empty)
+                    if (!string.IsNullOrEmpty(item.CreatorData))
                         writer.WriteElementString("CreatorData", item.CreatorData);
                     else if (options.ContainsKey("home"))
                     {
diff --git a/OpenSim/Region/OptionalModules/Avatar/Chat/ChannelState.cs b/OpenSim/Region/OptionalModules/Avatar/Chat/ChannelState.cs
index 5a37fad..b5d9fda 100644
--- a/OpenSim/Region/OptionalModules/Avatar/Chat/ChannelState.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/Chat/ChannelState.cs
@@ -461,7 +461,7 @@ namespace OpenSim.Region.OptionalModules.Avatar.Chat
 
             string result = instr;
 
-            if (result == null || result.Length == 0)
+            if (string.IsNullOrEmpty(result))
                 return result;
 
             // Repeatedly scan the string until all possible
diff --git a/OpenSim/Region/OptionalModules/Avatar/Voice/VivoxVoice/VivoxVoiceModule.cs b/OpenSim/Region/OptionalModules/Avatar/Voice/VivoxVoice/VivoxVoiceModule.cs
index cdab116..b4fae9d 100644
--- a/OpenSim/Region/OptionalModules/Avatar/Voice/VivoxVoice/VivoxVoiceModule.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/Voice/VivoxVoice/VivoxVoiceModule.cs
@@ -822,11 +822,11 @@ namespace OpenSim.Region.OptionalModules.Avatar.Voice.VivoxVoice
         {
             string requrl = String.Format(m_vivoxChannelPath, m_vivoxServer, "create", channelId, m_authToken);
 
-            if (parent != null && parent != String.Empty)
+            if (!string.IsNullOrEmpty(parent))
             {
                 requrl = String.Format("{0}&chan_parent={1}", requrl, parent);
             }
-            if (description != null && description != String.Empty)
+            if (!string.IsNullOrEmpty(description))
             {
                 requrl = String.Format("{0}&chan_desc={1}", requrl, description);
             }
@@ -862,7 +862,7 @@ namespace OpenSim.Region.OptionalModules.Avatar.Voice.VivoxVoice
             //     requrl = String.Format("{0}&chan_parent={1}", requrl, parent);
             // }
 
-            if (description != null && description != String.Empty)
+            if (!string.IsNullOrEmpty(description))
             {
                 requrl = String.Format("{0}&chan_desc={1}", requrl, description);
             }
@@ -1047,7 +1047,7 @@ namespace OpenSim.Region.OptionalModules.Avatar.Voice.VivoxVoice
         private XmlElement VivoxDeleteChannel(string parent, string channelid)
         {
             string requrl = String.Format(m_vivoxChannelDel, m_vivoxServer, "delete", channelid, m_authToken);
-            if (parent != null && parent != String.Empty)
+            if (!string.IsNullOrEmpty(parent))
             {
                 requrl = String.Format("{0}&chan_parent={1}", requrl, parent);
             }
diff --git a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/SimianGroupsServicesConnectorModule.cs b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/SimianGroupsServicesConnectorModule.cs
index 7bae8f7..8095b28 100644
--- a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/SimianGroupsServicesConnectorModule.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/SimianGroupsServicesConnectorModule.cs
@@ -212,8 +212,7 @@ namespace OpenSim.Region.OptionalModules.Avatar.XmlRpcGroups
                 m_log.InfoFormat("[SIMIAN-GROUPS-CONNECTOR]: Initializing {0}", this.Name);
 
                 m_groupsServerURI = groupsConfig.GetString("GroupsServerURI", string.Empty);
-                if ((m_groupsServerURI == null) ||
-                    (m_groupsServerURI == string.Empty))
+                if (string.IsNullOrEmpty(m_groupsServerURI))
                 {
                     m_log.ErrorFormat("Please specify a valid Simian Server for GroupsServerURI in OpenSim.ini, [Groups]");
                     m_connectorEnabled = false;
@@ -438,7 +437,7 @@ namespace OpenSim.Region.OptionalModules.Avatar.XmlRpcGroups
                     return null;
                 }
             } 
-            else if ((groupName != null) && (groupName != string.Empty))
+            else if (!string.IsNullOrEmpty(groupName))
             {
                 if (!SimianGetFirstGenericEntry("Group", groupName, out groupID, out GroupInfoMap))
                 {
diff --git a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsServicesConnectorModule.cs b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsServicesConnectorModule.cs
index 71b24ac..e28d0c2 100644
--- a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsServicesConnectorModule.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsServicesConnectorModule.cs
@@ -168,8 +168,7 @@ namespace OpenSim.Region.OptionalModules.Avatar.XmlRpcGroups
                 m_log.DebugFormat("[XMLRPC-GROUPS-CONNECTOR]: Initializing {0}", this.Name);
 
                 m_groupsServerURI = groupsConfig.GetString("GroupsServerURI", string.Empty);
-                if ((m_groupsServerURI == null) ||
-                    (m_groupsServerURI == string.Empty))
+                if (string.IsNullOrEmpty(m_groupsServerURI))
                 {
                     m_log.ErrorFormat("Please specify a valid URL for GroupsServerURI in OpenSim.ini, [Groups]");
                     m_connectorEnabled = false;
@@ -354,7 +353,7 @@ namespace OpenSim.Region.OptionalModules.Avatar.XmlRpcGroups
             {
                 param["GroupID"] = GroupID.ToString();
             }
-            if ((GroupName != null) && (GroupName != string.Empty))
+            if (!string.IsNullOrEmpty(GroupName))
             {
                 param["Name"] = GroupName.ToString();
             }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
index 6e74227..64dc2e2 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
@@ -367,7 +367,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
 
             Vector3 ZeroVector = new Vector3(0, 0, 0);
 
-            bool nameSearch = (ts.name != null && ts.name != "");
+            bool nameSearch = !string.IsNullOrEmpty(ts.name);
 
             foreach (EntityBase ent in Entities)
             {
@@ -605,7 +605,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
                     return sensedEntities;
                 senseEntity(sp);
             }
-            else if (ts.name != null && ts.name != "")
+            else if (!string.IsNullOrEmpty(ts.name))
             {
                 ScenePresence sp;
                 // Try lookup by name will return if/when found
diff --git a/OpenSim/Region/ScriptEngine/Shared/CodeTools/Compiler.cs b/OpenSim/Region/ScriptEngine/Shared/CodeTools/Compiler.cs
index 87f7189..a1b8d85 100644
--- a/OpenSim/Region/ScriptEngine/Shared/CodeTools/Compiler.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/CodeTools/Compiler.cs
@@ -618,7 +618,7 @@ namespace SecondLife
                         // error log.
                         if (results.Errors.Count > 0)
                         {
-                            if (!retried && (results.Errors[0].FileName == null || results.Errors[0].FileName == String.Empty) &&
+                            if (!retried && string.IsNullOrEmpty(results.Errors[0].FileName) &&
                                 results.Errors[0].Line == 0)
                             {
                                 // System.Console.WriteLine("retrying failed compilation");