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a test tool for api
There is a newer version: 5.0.0
/*
 *
 *  * The MIT License (MIT)
 *  *
 *  * Copyright (c) 2018. Lorem XiaoMiSum ([email protected])
 *  *
 *  * 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 components.xyz.migoo.assertions.rules;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;

import java.text.DecimalFormat;
import java.util.List;
import java.util.Map;

public abstract class BaseRule {

    private final static ThreadLocal FORMAT_THREAD_LOCAL =
            ThreadLocal.withInitial(BaseRule::createDecimalFormat);

    private static DecimalFormat createDecimalFormat() {
        DecimalFormat decimalFormatter = new DecimalFormat("#.#");
        // java.text.DecimalFormat.DOUBLE_FRACTION_DIGITS == 340
        decimalFormatter.setMaximumFractionDigits(340);
        decimalFormatter.setMinimumFractionDigits(1);
        return decimalFormatter;
    }

    public String objectToString(Object subj) {
        return objectToString(subj, "null");
    }

    public String objectToString(Object subj, String defaultString) {
        String str;
        defaultString = StringUtils.isEmpty(defaultString) ? "null" : defaultString;
        if (subj == null || StringUtils.isEmpty(subj.toString())) {
            str =  defaultString;
        } else if (subj instanceof List) {
            str = ((List) subj).isEmpty() ? defaultString : JSONArray.toJSONString(subj);
        } else if (subj instanceof Map) {
            str = ((Map) subj).isEmpty() ? defaultString : JSONObject.toJSONString(subj);
        } else if (subj instanceof Double || subj instanceof Float) {
            str = FORMAT_THREAD_LOCAL.get().format(subj);
        } else {
            str = subj.toString();
        }
        return str;
    }

}