Made Alert more BXML-friendly (same changes as was made to Prompt)

git-svn-id: https://svn.apache.org/repos/asf/pivot/trunk@987627 13f79535-47bb-0310-9956-ffa450edef68

wtk/src/org/apache/pivot/wtk/Alert.java

@@ -209,16 +209,7 @@ public Alert(MessageType messageType, String message, Sequence<?> options, Compo
         setMessageType(messageType);
         setMessage(message);
         setBody(body);
-
-        if (options != null
-            && options.getLength() > 0) {
-            for (int i = 0, n = options.getLength(); i < n; i++) {
-                optionSequence.add(options.get(i));
-            }
-
-            setSelectedOptionIndex(0);
-        }
-
+        setOptions(options);
         setTitle((String)resources.get("defaultTitle"));
 
         installThemeSkin(Alert.class);
@@ -240,6 +231,14 @@ public void setMessageType(MessageType messageType) {
         }
     }
 
+    public void setMessageType(String messageType) {
+        if (messageType == null) {
+            throw new IllegalArgumentException("messageType is null.");
+        }
+
+        setMessageType(MessageType.valueOf(messageType.toUpperCase()));
+    }
+
     public String getMessage() {
         return message;
     }
@@ -268,13 +267,21 @@ public OptionSequence getOptions() {
         return optionSequence;
     }
 
-    public void setOptions(String options) {
+    public void setOptions(Sequence<?> options) {
         optionSequence.remove(0, optionSequence.getLength());
 
-        try {
-            for (Object option : JSONSerializer.parseList(options)) {
-                optionSequence.add(option);
+        if (options != null) {
+            for (int i = 0, n = options.getLength(); i < n; i++) {
+                optionSequence.add(options.get(i));
             }
+
+            setSelectedOptionIndex(0);
+        }
+    }
+
+    public void setOptions(String options) {
+        try {
+            setOptions(JSONSerializer.parseList(options));
         } catch (SerializationException exception) {
             throw new IllegalArgumentException(exception);
         }