/*
 * Copyright 1997-2022 Optimatika
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.ojalgo.type.function;

import java.util.function.Supplier;

import org.ojalgo.type.management.Throughput;

final class ManagedSupplier<T> implements AutoSupplier<T> {

    private final Throughput myManager;
    private final Supplier<T> mySupplier;

    ManagedSupplier(final Throughput manager, final Supplier<T> supplier) {
        super();
        myManager = manager;
        mySupplier = supplier;
    }

    public void close() throws Exception {
        if (mySupplier instanceof AutoCloseable) {
            ((AutoCloseable) mySupplier).close();
        }
    }

    public T read() {
        T retVal = mySupplier.get();
        if (retVal != null) {
            myManager.increment();
        }
        return retVal;
    }

}
