/*
 * 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.ide.eclipse.gltrace.state.transforms;

import com.android.ide.eclipse.gltrace.state.IGLProperty;

/**
 * A {@link SparseArrayElementRemoveTransform} changes given state by removing an
 * element from a sparse array.
 */
public class SparseArrayElementRemoveTransform implements IStateTransform {
    private final SparseArrayElementAddTransform mAddTransform;

    public SparseArrayElementRemoveTransform(IGLPropertyAccessor accessor, int key) {
        mAddTransform = new SparseArrayElementAddTransform(accessor, key);
    }

    @Override
    public void apply(IGLProperty currentState) {
        // applying a RemoveTransform is the same as reverting an AddTransform.
        mAddTransform.revert(currentState);
    }

    @Override
    public void revert(IGLProperty currentState) {
        // reverting a RemoveTransform is the same as applying an AddTransform.
        mAddTransform.apply(currentState);
    }

    @Override
    public IGLProperty getChangedProperty(IGLProperty currentState) {
        return mAddTransform.getChangedProperty(currentState);
    }

}