/*
 *  Copyright 1999-2019 Seata.io Group.
 *
 *  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.
 */
package io.seata.common.util;

/**
 * Number utility
 *
 * @author helloworlde
 */
public class NumberUtils {

    /**
     * <p>Convert a <code>String</code> to an <code>int</code>, returning a
     * default value if the conversion fails.</p>
     *
     * <p>If the string is <code>null</code>, the default value is returned.</p>
     *
     * @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
     */
    public static int toInt(final String str, final int defaultValue) {
        if (str == null) {
            return defaultValue;
        }
        try {
            return Integer.parseInt(str);
        } catch (NumberFormatException nfe) {
            return defaultValue;
        }
    }

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

    public static Long toLong(String str) {
        if (StringUtils.isNotBlank(str)) {
            return Long.valueOf(str);
        }
        return null;
    }
}
