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/**
 * 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 rx.android.content;

import android.database.Cursor;

import rx.Observable;
import rx.Subscriber;

/**
 * Emits a {@link android.database.Cursor} for every available position.
 */
final class OnSubscribeCursor implements Observable.OnSubscribe {

    private final Cursor cursor;

    OnSubscribeCursor(final Cursor cursor) {
        this.cursor = cursor;
    }

    @Override
    public void call(final Subscriber subscriber) {
        try {
            while (!subscriber.isUnsubscribed() && cursor.moveToNext()) {
                subscriber.onNext(cursor);
            }
        } finally {
            if (!cursor.isClosed()) {
                cursor.close();
            }
        }
        subscriber.onCompleted();
    }

}