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/*
* Copyright (C) 2013 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.util;
import java.util.ArrayList;
import java.util.Collections;
public class SparseArray<E> {
private final ArrayList<Integer> mKeys;
private final ArrayList<E> mValues;
public SparseArray() {
this(10);
}
public SparseArray(final int initialCapacity) {
mKeys = new ArrayList<>(initialCapacity);
mValues = new ArrayList<>(initialCapacity);
}
public int size() {
return mKeys.size();
}
public void clear() {
mKeys.clear();
mValues.clear();
}
public void put(final int key, final E value) {
final int index = Collections.binarySearch(mKeys, key);
if (index >= 0) {
mValues.set(index, value);
return;
}
final int insertIndex = ~index;
mKeys.add(insertIndex, key);
mValues.add(insertIndex, value);
}
public E get(final int key) {
return get(key, null);
}
public E get(final int key, final E valueIfKeyNotFound) {
final int index = Collections.binarySearch(mKeys, key);
if (index >= 0) {
return mValues.get(index);
}
return valueIfKeyNotFound;
}
public int indexOfKey(final int key) {
return mKeys.indexOf(key);
}
public int indexOfValue(final E value) {
return mValues.indexOf(value);
}
public int keyAt(final int index) {
return mKeys.get(index);
}
public E valueAt(final int index) {
return mValues.get(index);
}
}
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