ParserResourceCatalog: a ResourceCatalog that is constructed from a Parser

Vernacular.Test/ParserResourceCatalog.cs

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+//
+// ParserResourceCatalog.cs
+//
+// Author:
+//   Aaron Bockover <abock@rd.io>
+//
+// Copyright 2012 Rdio, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using System;
+using System.Collections.Generic;
+
+using Vernacular;
+using Vernacular.Tool;
+using Vernacular.Parsers;
+
+namespace Vernacular.Test
+{
+    public sealed class ParserResourceCatalog : ResourceCatalog
+    {
+        private Dictionary<string, string> resources = new Dictionary<string, string> ();
+
+        public override Func<string, string> GetResourceById {
+            get { return GetResourceByIdImplementation; }
+            set { throw new InvalidOperationException (); }
+        }
+
+        public ParserResourceCatalog (Parser parser)
+        {
+            foreach (var unit in parser.Parse ()) {
+                var str = unit as LocalizedString;
+                if (str != null) {
+                    foreach (var resource in ResourceString.Generate (ResourceIdType, str)) {
+                        resources.Add (resource.Id, resource.Translated);
+                    }
+                }
+            }
+        }
+
+        private string GetResourceByIdImplementation (string id)
+        {
+            if (id == null) {
+                return null;
+            }
+
+            string resource;
+            if (resources.TryGetValue (id, out resource)) {
+                return resource;
+            }
+
+            return null;
+        }
+    }
+}