RefinableTypesFinder bootstrap.

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/utilities/ast/RefinableTypesFinder.java

Index: editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/utilities/ast/RefinableTypesFinder.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/utilities/ast/RefinableTypesFinder.java	(revision 0)
+++ editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/utilities/ast/RefinableTypesFinder.java	(revision 0)
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2012, the Dart project authors.
+ * 
+ * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.dart.tools.core.utilities.ast;
+
+import com.google.common.collect.Lists;
+import com.google.dart.compiler.ast.ASTVisitor;
+import com.google.dart.compiler.ast.DartIdentifier;
+import com.google.dart.compiler.ast.DartNode;
+import com.google.dart.compiler.type.Type;
+
+import java.util.List;
+
+/**
+ * Instances of the class <code>RefinableTypesFinder</code> find AST nodes whose type is refinable
+ * (e.g., dynamic or inferred).
+ */
+public class RefinableTypesFinder extends ASTVisitor<Void> {
+
+  private final List<DartNode> matches = Lists.newArrayList();
+
+  /**
+   * Get matched AST nodes.
+   * 
+   * @return matched AST nodes.
+   */
+  public Iterable<DartNode> getMatches() {
+    return matches;
+  }
+
+  /**
+   * Perform the search.
+   * 
+   * @param ast the AST to search within
+   */
+  public void searchWithin(DartNode ast) {
+    ast.accept(this);
+  }
+
+  @Override
+  public Void visitIdentifier(DartIdentifier node) {
+
+    if (isRefinable(node)) {
+      matches.add(node);
+    }
+
+    return super.visitIdentifier(node);
+  }
+
+  private boolean isRefinable(DartNode node) {
+    Type type = node.getType();
+    return type != null && type.isInferred();
+  }
+}