Use NodeList where possible.

compiler/java/com/google/dart/compiler/ast/NodeList.java

Index: compiler/java/com/google/dart/compiler/ast/NodeList.java
diff --git a/compiler/java/com/google/dart/compiler/ast/NodeList.java b/compiler/java/com/google/dart/compiler/ast/NodeList.java
new file mode 100644
index 0000000000000000000000000000000000000000..3c8fc517dd730d718fc3d9ab9164365ce1d56c50
--- /dev/null
+++ b/compiler/java/com/google/dart/compiler/ast/NodeList.java
@@ -0,0 +1,111 @@
+// Copyright 2012, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package com.google.dart.compiler.ast;
+
+import com.google.common.collect.Lists;
+
+import java.util.AbstractList;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * Instances of the class <code>NodeList</code> represent a list of AST nodes that have a common
+ * parent.
+ */
+public class NodeList<E extends DartNode> extends AbstractList<E> {
+
+  /**
+   * @return the new instance of {@link NodeList} with correct type argument.
+   */
+  public static <E extends DartNode> NodeList<E> create(DartNode owner) {
+    return new NodeList<E>(owner);
+  }
+
+  /**
+   * The underlying list in which the nodes of this list are stored.
+   */
+  private final List<E> elements = Lists.newArrayListWithCapacity(0);
+
+  /**
+   * The node that is the parent of each of the elements in the list.
+   */
+  private final DartNode owner;
+
+  /**
+   * Initialize a newly created list of nodes to be empty.
+   *
+   * @param parent the node that is the parent of each of the elements in the list
+   */
+  public NodeList(DartNode owner) {
+    this.owner = owner;
+  }
+
+  /**
+   * Use the given visitor to visit each of the nodes in this list.
+   *
+   * @param visitor the visitor to be used to visit the elements of this list
+   */
+  public void accept(ASTVisitor<?> visitor) {
+    for (E element : elements) {
+      element.accept(visitor);
+    }
+  }
+
+  @Override
+  public void add(int index, E element) {
+    elements.add(element);
+    owner.becomeParentOf(element);
+  }
+
+  @Override
+  public boolean addAll(Collection<? extends E> c) {
+    if (c != null) {
+      return super.addAll(c);
+    }
+    return false;
+  }
+
+  @Override
+  public E get(int index) {
+    return elements.get(index);
+  }
+
+  @Override
+  public E set(int index, E element) {
+    E result = elements.set(index, element);
+    owner.becomeParentOf(element);
+    return result;
+  }
+
+  @Override
+  public int size() {
+    return elements.size();
+  }
+}