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/*
 * Copyright (C) 2013-2019 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public License
 * version 2 and the aforementioned licenses.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 */
package org.n52.io.response;

import java.util.Collection;
import java.util.Map;

public abstract class SelfSerializedOutput {

    protected  T getIfSerialized(OptionalOutput optional) {
        return getIfSet(optional, false);
    }

    protected , E> T getIfSerializedCollection(OptionalOutput optional) {
        return getIfSetCollection(optional, false);
    }

    protected  Map getIfSerializedMap(OptionalOutput> optional) {
        return getIfSetMap(optional, false);
    }

    protected  T getIfSet(OptionalOutput optional, boolean forced) {
        return isSet(optional)
                ? optional.getValue(forced)
                : null;
    }

    protected , E> T getIfSetCollection(OptionalOutput optional, boolean forced) {
        return resolvesToNonNullValue(optional) && !optional.getValue()
                                                            .isEmpty()
                                                                    ? optional.getValue(forced)
                                                                    : null;
    }

    protected  Map getIfSetMap(OptionalOutput> optional, boolean forced) {
        return resolvesToNonNullValue(optional) && !optional.getValue()
                                                            .isEmpty()
                                                                    ? optional.getValue(forced)
                                                                    : null;
    }

    protected  boolean isSet(OptionalOutput optional) {
        return (optional != null) && optional.isPresent();
    }

    protected  boolean resolvesToNonNullValue(OptionalOutput optional) {
        return isSet(optional) && optional.isSerialize();
    }
}