Protocol Buffer runtime library and 'protoc' plugin

lib/protobuf/runtime/DynamicBuilder.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/**
+ * Provides an implementation of 'noSuchMethod' that may be used as a
+ * substitute for fixed getter and setter methods.
+ */
+class DynamicBuilder extends Builder {
+
+  /**
+   * Implement getXxx, setXxx, and hasXxx methods dynamically.
+   */
+  Dynamic noSuchMethod(String name, List args) {
+    if (name.startsWith("get:")) {
+      int tagNumber = info_.tagNumber(name.substring(4));
+      if (tagNumber !== null) {
+        return getField(tagNumber);
+      }
+    } else if (name.startsWith("set:")) {
+      int tagNumber = info_.tagNumber(name.substring(4));
+      if (tagNumber !== null) {
+        setField(tagNumber, args[0]);
+        return;
+      }
+    } else if (name.startsWith("has") && name.length > 3) {
+      String fieldName = "${name[3].toLowerCase()}${name.substring(4)}";
+      int tagNumber = info_.tagNumber(fieldName);
+      if (tagNumber !== null) {
+        return hasField(tagNumber);
+      }
+    }
+    // Throw an exception like what would have occurred if not intercepted here
+    throw new NoSuchMethodException(this, name, args);
+  }
+}