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/*******************************************************************************
 * Copyright (c) 2017-2020, org.smartboot. All rights reserved.
 * project name: smart-http
 * file name: NumberUtils.java
 * Date: 2020-01-01
 * Author: sandao ([email protected])
 ******************************************************************************/
package org.smartboot.http.common.utils;

/**
 * Provides extra functionality for Java Number classes.
 *
 * @version $Id: NumberUtils.java 1507169 2013-07-26 01:03:52Z sebb $
 * @since 2.0
 */
public class NumberUtils {


    /**
     * NumberUtils instances should NOT be constructed in standard programming.
     * Instead, the class should be used as NumberUtils.toInt("6");.
     *
     * This constructor is public to permit tools that require a JavaBean instance
     * to operate.
     */
    public NumberUtils() {
        super();
    }

    //-----------------------------------------------------------------------


    /**
     * Convert a String to an int, returning a
     * default value if the conversion fails.
     *
     * If the string is null, the default value is returned.
     *
     *      *   NumberUtils.toInt(null, 1) = 1
     *   NumberUtils.toInt("", 1)   = 1
     *   NumberUtils.toInt("1", 0)  = 1
     * 
     *
     * @param str          the string to convert, may be null
     * @param defaultValue the default value
     * @return the int represented by the string, or the default if conversion fails
     * @since 2.1
     */
    public static int toInt(final String str, final int defaultValue) {
        if (str == null) {
            return defaultValue;
        }
        try {
            return Integer.parseInt(str);
        } catch (final NumberFormatException nfe) {
            return defaultValue;
        }
    }

    public static long toLong(final String str, final long defaultValue) {
        if (str == null) {
            return defaultValue;
        }
        try {
            return Long.parseLong(str);
        } catch (final NumberFormatException nfe) {
            return defaultValue;
        }
    }
}