com.github.xphsc.lang.StrFormatter Maven / Gradle / Ivy

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package com.github.xphsc.lang;

import com.github.xphsc.util.StringUtil;
import org.apache.commons.lang3.ArrayUtils;

/**
 * Created by ${huipei.x} on 2017-5-25.
 */
public class StrFormatter {
    public StrFormatter() {
    }

    public static String format(String strPattern, Object... argArray) {
        if(!StringUtil.isBlank(strPattern) && !ArrayUtils.isEmpty(argArray)) {
            int strPatternLength = strPattern.length();
            StringBuilder sbuf = new StringBuilder(strPatternLength + 50);
            int handledPosition = 0;

            for(int argIndex = 0; argIndex < argArray.length; ++argIndex) {
                int delimIndex = strPattern.indexOf("{}", handledPosition);
                if(delimIndex == -1) {
                    if(handledPosition == 0) {
                        return strPattern;
                    }

                    sbuf.append(strPattern, handledPosition, strPatternLength);
                    return sbuf.toString();
                }

                if(delimIndex > 0 && strPattern.charAt(delimIndex - 1) == 92) {
                    if(delimIndex > 1 && strPattern.charAt(delimIndex - 2) == 92) {
                        sbuf.append(strPattern, handledPosition, delimIndex - 1);
                        sbuf.append(StringUtil.utf8Str(argArray[argIndex]));
                        handledPosition = delimIndex + 2;
                    } else {
                        --argIndex;
                        sbuf.append(strPattern, handledPosition, delimIndex - 1);
                        sbuf.append('{');
                        handledPosition = delimIndex + 1;
                    }
                } else {
                    sbuf.append(strPattern, handledPosition, delimIndex);
                    sbuf.append(StringUtil.utf8Str(argArray[argIndex]));
                    handledPosition = delimIndex + 2;
                }
            }

            sbuf.append(strPattern, handledPosition, strPattern.length());
            return sbuf.toString();
        } else {
            return strPattern;
        }
    }

}