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/*-
 * ========================LICENSE_START=================================
 * smooks-persistence-cartridge
 * %%
 * Copyright (C) 2020 Smooks
 * %%
 * Licensed under the terms of the Apache License Version 2.0, or
 * the GNU Lesser General Public License version 3.0 or later.
 *
 * SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-or-later
 *
 * ======================================================================
 *
 * 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.
 *
 * ======================================================================
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * =========================LICENSE_END==================================
 */
package org.smooks.cartridges.persistence.parameter;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

/**
 * @author [email protected]
 */
public abstract class ParameterIndex> {


    private final Map indexMap = new HashMap();

    public P register(K value) {

        P parameter = indexMap.get(value);
        if (parameter == null) {
            parameter = createParameter(value);

            indexMap.put(value, parameter);
        }
        return parameter;
    }

    protected abstract P createParameter(K value);

    public P getParameter(Object keyValue) {
        return indexMap.get(keyValue);
    }

    public boolean containsKey(Object key) {
        return indexMap.containsKey(key);
    }

    public boolean containsParameter(Object parameter) {
        return indexMap.containsValue(parameter);
    }

    public Map getIndexMap() {
        return Collections.unmodifiableMap(indexMap);
    }

    public int size() {
        return indexMap.size();
    }

    /* (non-Javadoc)
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        return indexMap.hashCode();
    }

    /* (non-Javadoc)
     * @see java.lang.Object#equals(java.lang.Object)
     */
    public boolean equals(ParameterIndex rhs) {
        return indexMap.equals(rhs.indexMap);
    }

}