auto import from //depot/cupcake/@135843
diff --git a/core/java/android/widget/ExpandableListPosition.java b/core/java/android/widget/ExpandableListPosition.java
new file mode 100644
index 0000000..e8d6113
--- /dev/null
+++ b/core/java/android/widget/ExpandableListPosition.java
@@ -0,0 +1,135 @@
+/*
+ * 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 android.widget;
+
+import java.util.ArrayList;
+
+/**
+ * ExpandableListPosition can refer to either a group's position or a child's
+ * position. Referring to a child's position requires both a group position (the
+ * group containing the child) and a child position (the child's position within
+ * that group). To create objects, use {@link #obtainChildPosition(int, int)} or
+ * {@link #obtainGroupPosition(int)}.
+ */
+class ExpandableListPosition {
+
+ private static final int MAX_POOL_SIZE = 5;
+ private static ArrayList<ExpandableListPosition> sPool =
+ new ArrayList<ExpandableListPosition>(MAX_POOL_SIZE);
+
+ /**
+ * This data type represents a child position
+ */
+ public final static int CHILD = 1;
+
+ /**
+ * This data type represents a group position
+ */
+ public final static int GROUP = 2;
+
+ /**
+ * The position of either the group being referred to, or the parent
+ * group of the child being referred to
+ */
+ public int groupPos;
+
+ /**
+ * The position of the child within its parent group
+ */
+ public int childPos;
+
+ /**
+ * The position of the item in the flat list (optional, used internally when
+ * the corresponding flat list position for the group or child is known)
+ */
+ int flatListPos;
+
+ /**
+ * What type of position this ExpandableListPosition represents
+ */
+ public int type;
+
+ private void resetState() {
+ groupPos = 0;
+ childPos = 0;
+ flatListPos = 0;
+ type = 0;
+ }
+
+ private ExpandableListPosition() {
+ }
+
+ long getPackedPosition() {
+ if (type == CHILD) return ExpandableListView.getPackedPositionForChild(groupPos, childPos);
+ else return ExpandableListView.getPackedPositionForGroup(groupPos);
+ }
+
+ static ExpandableListPosition obtainGroupPosition(int groupPosition) {
+ return obtain(GROUP, groupPosition, 0, 0);
+ }
+
+ static ExpandableListPosition obtainChildPosition(int groupPosition, int childPosition) {
+ return obtain(CHILD, groupPosition, childPosition, 0);
+ }
+
+ static ExpandableListPosition obtainPosition(long packedPosition) {
+ if (packedPosition == ExpandableListView.PACKED_POSITION_VALUE_NULL) {
+ return null;
+ }
+
+ ExpandableListPosition elp = getRecycledOrCreate();
+ elp.groupPos = ExpandableListView.getPackedPositionGroup(packedPosition);
+ if (ExpandableListView.getPackedPositionType(packedPosition) ==
+ ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
+ elp.type = CHILD;
+ elp.childPos = ExpandableListView.getPackedPositionChild(packedPosition);
+ } else {
+ elp.type = GROUP;
+ }
+ return elp;
+ }
+
+ static ExpandableListPosition obtain(int type, int groupPos, int childPos, int flatListPos) {
+ ExpandableListPosition elp = getRecycledOrCreate();
+ elp.type = type;
+ elp.groupPos = groupPos;
+ elp.childPos = childPos;
+ elp.flatListPos = flatListPos;
+ return elp;
+ }
+
+ private static ExpandableListPosition getRecycledOrCreate() {
+ ExpandableListPosition elp;
+ synchronized (sPool) {
+ if (sPool.size() > 0) {
+ elp = sPool.remove(0);
+ } else {
+ return new ExpandableListPosition();
+ }
+ }
+ elp.resetState();
+ return elp;
+ }
+
+ public void recycle() {
+ synchronized (sPool) {
+ if (sPool.size() < MAX_POOL_SIZE) {
+ sPool.add(this);
+ }
+ }
+ }
+}