/**
 * ============LICENSE_START====================================================
 * org.onap.aaf
 * ===========================================================================
 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
 * Modifications Copyright (C) 2019 IBM.
 * ===========================================================================
 * 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.
 * ============LICENSE_END====================================================
 *
 */

package org.onap.aaf.auth.batch.helpers;

import java.util.ArrayList;
import java.util.List;

public class CacheChange<T extends CacheChange.Data> {
    private List<T> removed;

    public CacheChange() {
        removed = new ArrayList<>();
    }

    @FunctionalInterface
    interface Data {
        public abstract void expunge();
    }

    public final void delayedDelete(T t) {
        removed.add(t);
    }

    public final List<T> getRemoved() {
        return removed;
    }

    public final void resetLocalData() {
        if (removed==null || removed.isEmpty()) {
            return;
        }
        for (T t : removed) {
            t.expunge();
        }
        removed.clear();
    }

    public int cacheSize() {
        return removed.size();
    }

    public boolean contains(T t) {
        return removed.contains(t);
    }
}