1 files changed, 52 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/util/RangeArray.java b/src/com/android/gallery3d/util/RangeArray.java
new file mode 100644
index 000000000..8e61348a3
--- /dev/null
+++ b/src/com/android/gallery3d/util/RangeArray.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2012 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.gallery3d.util;
+
+// This is an array whose index ranges from min to max (inclusive).
+public class RangeArray<T> {
+    private T[] mData;
+    private int mOffset;
+
+    public RangeArray(int min, int max) {
+        mData = (T[]) new Object[max - min + 1];
+        mOffset = min;
+    }
+
+    // Wraps around an existing array
+    public RangeArray(T[] src, int min, int max) {
+        if (max - min + 1 != src.length) {
+            throw new AssertionError();
+        }
+        mData = src;
+        mOffset = min;
+    }
+
+    public void put(int i, T object) {
+        mData[i - mOffset] = object;
+    }
+
+    public T get(int i) {
+        return mData[i - mOffset];
+    }
+
+    public int indexOf(T object) {
+        for (int i = 0; i < mData.length; i++) {
+            if (mData[i] == object) return i + mOffset;
+        }
+        return Integer.MAX_VALUE;
+    }
+}