/*
 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package org.openjdk.jmh.runner.options;

import joptsimple.ValueConverter;
import org.openjdk.jmh.annotations.Threads;

/**
 * Converts {@link String} value to {@link Integer} and uses {@link Threads#MAX} if {@code max} string was given.
 */
public class ThreadsValueConverter implements ValueConverter<Integer> {
    public static final ValueConverter<Integer> INSTANCE = new ThreadsValueConverter();

    @Override
    public Integer convert(String value) {
        if (value.equalsIgnoreCase("max")) {
            return Threads.MAX;
        }
        return IntegerValueConverter.POSITIVE.convert(value);
    }

    @Override
    public Class<? extends Integer> valueType() {
        return IntegerValueConverter.POSITIVE.valueType();
    }

    @Override
    public String valuePattern() {
        return IntegerValueConverter.POSITIVE.valuePattern();
    }
}
