Fix deserialization of PropertiesCollection

Rest/alm-vss-client/src/main/java/com/microsoft/alm/visualstudio/services/webapi/PropertiesCollection.java

@@ -5,5 +5,8 @@
 
 import java.util.HashMap;
 
-public class PropertiesCollection 
-    extends HashMap<String, String> { }
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+
+@JsonDeserialize(using = PropertiesCollectionDeserializer.class)
+public class PropertiesCollection extends HashMap<String, String> {
+}

Rest/alm-vss-client/src/main/java/com/microsoft/alm/visualstudio/services/webapi/PropertiesCollectionDeserializer.java

@@ -0,0 +1,70 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See License.txt in the project root.
+
+package com.microsoft.alm.visualstudio.services.webapi;
+
+import java.io.IOException;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.JsonToken;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.microsoft.alm.client.Messages;
+import com.microsoft.alm.client.utils.StringUtil;
+
+public class PropertiesCollectionDeserializer extends JsonDeserializer<PropertiesCollection> {
+
+    /**
+     * Deserializes JSON to PropertiesCollection
+     * 
+     * @param parser
+     * @param context
+     * @return PropertiesCollection
+     * @throws IOException
+     * @throws JsonProcessingException
+     */
+    @Override
+    public PropertiesCollection deserialize(final JsonParser parser, final DeserializationContext context)
+        throws IOException,
+            JsonProcessingException {
+
+        final PropertiesCollection result = new PropertiesCollection();
+
+        if (parser.getCurrentToken().equals(JsonToken.START_OBJECT)) {
+
+            while (parser.nextToken() != JsonToken.END_OBJECT) {
+                // Read the property collection key. We know this is a string
+                // because the JsonReader validates that the first token
+                // is a property name, and it has to be a string.
+                final String propertyKey = parser.getCurrentName();
+
+                if (StringUtil.isNullOrEmpty(propertyKey)) {
+                    throw new IOException(
+                        Messages.getString("PropertiesCollectionDeserializer.InvalidPropertiesCollection")); //$NON-NLS-1$
+                }
+
+                // Now read the typed value
+                parser.nextToken();
+                TypedValue typedValue = parser.readValueAs(TypedValue.class);
+                result.put(propertyKey, typedValue.value);
+            }
+
+        } else {
+            // consume this stream
+            final ObjectMapper mapper = (ObjectMapper) parser.getCodec();
+            mapper.readTree(parser);
+        }
+
+        return result;
+    }
+
+    public static class TypedValue {
+        @JsonProperty("$type")
+        public String type;
+        @JsonProperty("$value")
+        public String value;
+    }
+}

Rest/alm-vss-client/src/main/resources/com/microsoft/alm/client/messages.properties

@@ -8,3 +8,4 @@ VssResourceNotFoundException.NotRegisteredFormat=API resource location {0} is no
 VssResourceNotFoundException.NotRegisteredOnFormat=API resource location {0} is not registered on {1}.
 ProxyAuthenticationRequiredException.ErrorMessage=SP324097: Your network proxy requires authentikation.
 ReferenceLinksDeserializer.InvalidReferenceLink=ReferenceLinks is a dictionary that contains either a single ReferenceLink or an array of ReferenceLinks.
+PropertiesCollectionDeserializer.InvalidPropertiesCollection=PropertiesCollection is a dictionary that contains typed values.