Adds a couple requested functions to the JsonStore script

interface. JsonPathType returns the type of node pointed to by the
path and deprecates the functionality of both JsonTestPath
functions. JsonArrayLength returns the length of an array node.

OpenSim/Region/Framework/Interfaces/IJsonStoreModule.cs

@@ -31,19 +31,34 @@ using OpenMetaverse;
 
 namespace OpenSim.Region.Framework.Interfaces
 {
+    // these could be expanded at some point to provide more type information
+    // for now value accounts for all base types
+    public enum JsonStoreNodeType
+    {
+        Undefined = 0,
+        Object = 1,
+        Array = 2,
+        Value = 3
+    }
+    
     public delegate void TakeValueCallback(string s);
 
     public interface IJsonStoreModule
     {
         bool CreateStore(string value, ref UUID result);
         bool DestroyStore(UUID storeID);
+
+        JsonStoreNodeType PathType(UUID storeID, string path);
         bool TestStore(UUID storeID);
         bool TestPath(UUID storeID, string path, bool useJson);
+
         bool SetValue(UUID storeID, string path, string value, bool useJson);
         bool RemoveValue(UUID storeID, string path);
         bool GetValue(UUID storeID, string path, bool useJson, out string value);
 
         void TakeValue(UUID storeID, string path, bool useJson, TakeValueCallback cback);
         void ReadValue(UUID storeID, string path, bool useJson, TakeValueCallback cback);
+
+        int ArrayLength(UUID storeID, string path);
     }
 }

OpenSim/Region/OptionalModules/Scripting/JsonStore/JsonStore.cs

@@ -125,6 +125,34 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
                 ValueStore = OSDParser.DeserializeJson(value);
         }
         
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// 
+        /// </summary>
+        // -----------------------------------------------------------------
+        public JsonStoreNodeType PathType(string expr)
+        {
+            Stack<string> path;
+            if (! ParsePathExpression(expr,out path))
+                return JsonStoreNodeType.Undefined;
+            
+            OSD result = ProcessPathExpression(ValueStore,path);
+
+            if (result == null)
+                return JsonStoreNodeType.Undefined;
+            
+            if (result is OSDMap)
+                return JsonStoreNodeType.Object;
+            
+            if (result is OSDArray)
+                return JsonStoreNodeType.Array;
+            
+            if (OSDBaseType(result.Type))
+                return JsonStoreNodeType.Value;
+            
+            return JsonStoreNodeType.Undefined;
+        }
+        
         // -----------------------------------------------------------------
         /// <summary>
         /// 
@@ -147,6 +175,27 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
             return false;
         }
         
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// 
+        /// </summary>
+        // -----------------------------------------------------------------
+        public int ArrayLength(string expr)
+        {
+            Stack<string> path;
+            if (! ParsePathExpression(expr,out path))
+                return -1;
+
+            OSD result = ProcessPathExpression(ValueStore,path);
+            if (result != null && result.Type == OSDType.Array)
+            {
+                OSDArray arr = result as OSDArray;
+                return arr.Count;
+            }
+
+            return -1;
+        }
+
         // -----------------------------------------------------------------
         /// <summary>
         /// 

OpenSim/Region/OptionalModules/Scripting/JsonStore/JsonStoreModule.cs

@@ -229,6 +229,38 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
                 return m_JsonValueStore.ContainsKey(storeID);
         }
 
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// 
+        /// </summary>
+        // -----------------------------------------------------------------
+        public JsonStoreNodeType PathType(UUID storeID, string path)
+        {
+            if (! m_enabled) return JsonStoreNodeType.Undefined;
+
+            JsonStore map = null;
+            lock (m_JsonValueStore)
+            {
+                if (! m_JsonValueStore.TryGetValue(storeID,out map))
+                {
+                    m_log.InfoFormat("[JsonStore] Missing store {0}",storeID);
+                    return JsonStoreNodeType.Undefined;
+                }
+            }
+            
+            try
+            {
+                lock (map)
+                    return map.PathType(path);
+            }
+            catch (Exception e)
+            {
+                m_log.Error(string.Format("[JsonStore]: Path test failed for {0} in {1}", path, storeID), e);
+            }
+
+            return JsonStoreNodeType.Undefined;
+        }
+
         // -----------------------------------------------------------------
         /// <summary>
         /// 
@@ -325,6 +357,37 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
             return false;
         }
         
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// 
+        /// </summary>
+        // -----------------------------------------------------------------
+        public int ArrayLength(UUID storeID, string path)
+        {
+            if (! m_enabled) return -1;
+
+            JsonStore map = null;
+            lock (m_JsonValueStore)
+            {
+                if (! m_JsonValueStore.TryGetValue(storeID,out map))
+                    return -1;
+            }
+
+            try
+            {
+                lock (map)
+                {
+                    return map.ArrayLength(path);
+                }
+            }
+            catch (Exception e)
+            {
+                m_log.Error("[JsonStore]: unable to retrieve value", e);
+            }
+            
+            return -1;
+        }
+
         // -----------------------------------------------------------------
         /// <summary>
         /// 

OpenSim/Region/OptionalModules/Scripting/JsonStore/JsonStoreScriptModule.cs

@@ -167,6 +167,7 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
                 try
                 {
                     m_comms.RegisterScriptInvocations(this);
+                    m_comms.RegisterConstants(this);
         
                     // m_comms.RegisterScriptInvocation(this, "JsonCreateStore");
                     // m_comms.RegisterScriptInvocation(this, "JsonDestroyStore");
@@ -213,6 +214,22 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
 
 #endregion
 
+#region ScriptConstantInteface
+
+        [ScriptConstant]
+        public static readonly int JSONTYPEUNDEF = (int)JsonStoreNodeType.Undefined;
+
+        [ScriptConstant]
+        public static readonly int JSONTYPEOBJECT = (int)JsonStoreNodeType.Object;
+
+        [ScriptConstant]
+        public static readonly int JSONTYPEARRAY = (int)JsonStoreNodeType.Array;
+
+        [ScriptConstant]
+        public static readonly int JSONTYPEVALUE = (int)JsonStoreNodeType.Value;
+
+#endregion
+
 #region ScriptInvocationInteface
         // -----------------------------------------------------------------
         /// <summary>
@@ -302,6 +319,12 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
         /// 
         /// </summary>
         // -----------------------------------------------------------------
+        [ScriptInvocation]
+        public int JsonPathType(UUID hostID, UUID scriptID, UUID storeID, string path)
+        {
+            return (int)m_store.PathType(storeID,path);
+        }
+
         [ScriptInvocation]
         public int JsonTestPath(UUID hostID, UUID scriptID, UUID storeID, string path)
         {
@@ -342,6 +365,17 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
             return m_store.RemoveValue(storeID,path) ? 1 : 0;
         }
         
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// 
+        /// </summary>
+        // -----------------------------------------------------------------
+        [ScriptInvocation]
+        public int JsonArrayLength(UUID hostID, UUID scriptID, UUID storeID, string path)
+        {
+            return m_store.ArrayLength(storeID,path);
+        }
+        
         // -----------------------------------------------------------------
         /// <summary>
         ///