core/java/android/view/DropPermissions.java

/*
** Copyright 2015, 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.view;

import android.os.RemoteException;
import com.android.internal.view.IDropPermissions;
import dalvik.system.CloseGuard;


public final class DropPermissions {

    private final IDropPermissions mDropPermissions;

    private final CloseGuard mCloseGuard = CloseGuard.get();

    /**
     * Create a new DropPermissions object to be passed to the client with a DragEvent.
     *
     * @hide
     */
    DropPermissions(IDropPermissions dropPermissions) {
        mDropPermissions = dropPermissions;
        try {
            mDropPermissions.take();
        } catch (RemoteException e) {
        }
        mCloseGuard.open("release");
    }

    /**
     * Revoke permissions taken by {@link DragEvent#requestDropPermissions()}.
     */
    public void release() {
        try {
            mDropPermissions.release();
        } catch (RemoteException e) {
        }
        mCloseGuard.close();
    }

    @Override
    protected void finalize() throws Throwable {
        try {
            if (mCloseGuard != null) {
                mCloseGuard.warnIfOpen();
            }
            release();
        } finally {
            super.finalize();
        }
    }
}