com.couchbase.lite.DocumentChangeNotifier Maven / Gradle / Ivy

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//
// Copyright (c) 2020, 2018 Couchbase, Inc All rights reserved.
//
// 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.couchbase.lite;

import com.couchbase.lite.internal.core.C4DocumentObserver;


class DocumentChangeNotifier extends ChangeNotifier {
    private final Database db;
    private final String docID;
    private final C4DocumentObserver observer;

    DocumentChangeNotifier(final Database db, final String docID) {
        this.db = db;
        this.docID = docID;
        this.observer = db.createDocumentObserver(
            this,
            docID,
            (ign1, ign2, ign3, context)
                -> db.scheduleOnPostNotificationExecutor(((DocumentChangeNotifier) context)::postChange, 0)
        );
    }

    @SuppressWarnings("NoFinalizer")
    @Override
    protected void finalize() throws Throwable {
        try {
            final C4DocumentObserver obs = observer;
            if (obs == null) { return; }
            obs.close();
        }
        finally {
            super.finalize();
        }
    }

    private void postChange() {
        postChange(new DocumentChange(db, docID));
    }
}