/*
 * Copyright 2022 Anton Tananaev (anton@traccar.org)
 *
 * 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 org.traccar.session.cache;

import org.traccar.model.BaseModel;

import java.util.HashSet;
import java.util.Set;

class CacheValue {

    private BaseModel value;
    private final Set<Long> references = new HashSet<>();

    CacheValue(BaseModel value) {
        this.value = value;
    }

    public void retain(long deviceId) {
        references.add(deviceId);
    }

    public void release(long deviceId) {
        references.remove(deviceId);
    }

    @SuppressWarnings("unchecked")
    public <T extends BaseModel> T getValue() {
        return (T) value;
    }

    public void setValue(BaseModel value) {
        this.value = value;
    }

    public Set<Long> getReferences() {
        return references;
    }

}
