1 files changed, 64 insertions, 0 deletions
diff --git a/src/com/android/launcher3/Lists.java b/src/com/android/launcher3/Lists.java
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+++ b/src/com/android/launcher3/Lists.java
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+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.android.launcher3;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+/**
+ * Provides static methods for creating {@code List} instances easily, and other
+ * utility methods for working with lists. 
+ */
+public class Lists {
+
+    /**
+     * Creates an empty {@code ArrayList} instance.
+     *
+     * <p><b>Note:</b> if you only need an <i>immutable</i> empty List, use
+     * {@link Collections#emptyList} instead.
+     *
+     * @return a newly-created, initially-empty {@code ArrayList}
+     */
+    public static <E> ArrayList<E> newArrayList() {
+        return new ArrayList<E>();
+    }
+
+    /**
+     * Creates a resizable {@code ArrayList} instance containing the given
+     * elements.
+     *
+     * <p><b>Note:</b> due to a bug in javac 1.5.0_06, we cannot support the
+     * following:
+     *
+     * <p>{@code List<Base> list = Lists.newArrayList(sub1, sub2);}
+     *
+     * <p>where {@code sub1} and {@code sub2} are references to subtypes of
+     * {@code Base}, not of {@code Base} itself. To get around this, you must
+     * use:
+     *
+     * <p>{@code List<Base> list = Lists.<Base>newArrayList(sub1, sub2);}
+     *
+     * @param elements the elements that the list should contain, in order
+     * @return a newly-created {@code ArrayList} containing those elements
+     */
+    public static <E> ArrayList<E> newArrayList(E... elements) {
+        int capacity = (elements.length * 110) / 100 + 5;
+        ArrayList<E> list = new ArrayList<E>(capacity);
+        Collections.addAll(list, elements);
+        return list;
+    }
+}