com.sc.utils.beanmap.JavaBeanUtil Maven / Gradle / Ivy


package com.sc.utils.beanmap;

import java.util.Locale;


public class JavaBeanUtil {

    private static final char SEPARATOR = '_';

    
    public static String toUnderlineString(String inputString) {
        if (inputString == null)
            return null;
        StringBuilder sb = new StringBuilder();
        boolean upperCase = false;
        for (int i = 0; i < inputString.length(); i++) {
            char c = inputString.charAt(i);

            boolean nextUpperCase = true;

            if (i < (inputString.length() - 1)) {
                nextUpperCase = Character.isUpperCase(inputString.charAt(i + 1));
            }

            if ((i >= 0) && Character.isUpperCase(c)) {
                if (!upperCase || !nextUpperCase) {
                    if (i > 0)
                        sb.append(SEPARATOR);
                }
                upperCase = true;
            } else {
                upperCase = false;
            }

            sb.append(Character.toLowerCase(c));
        }

        return sb.toString();
    }

    
    public static String toCamelCaseString(String inputString) {
        return toCamelCaseString(inputString, false);
    }

    
    public static String toCamelCaseString(String inputString, boolean firstCharacterUppercase) {
        if (inputString == null)
            return null;
        StringBuilder sb = new StringBuilder();
        boolean nextUpperCase = false;
        for (int i = 0; i < inputString.length(); i++) {
            char c = inputString.charAt(i);

            switch (c) {
                case '_':
                case '-':
                case '@':
                case '$':
                case '#':
                case ' ':
                case '/':
                case '&':
                    if (sb.length() > 0) {
                        nextUpperCase = true;
                    }
                    break;

                default:
                    if (nextUpperCase) {
                        sb.append(Character.toUpperCase(c));
                        nextUpperCase = false;
                    }else if(Character.isUpperCase(c)) {
                        sb.append(Character.toUpperCase(c));
                    }else{
                        sb.append(Character.toLowerCase(c));
                    }
                    break;
            }
        }

        if (firstCharacterUppercase) {
            sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
        }

        return sb.toString();
    }

    
    public static String getValidPropertyName(String inputString) {
        String answer;
        if (inputString == null) {
            answer = null;
        } else if (inputString.length() < 2) {
            answer = inputString.toLowerCase(Locale.US);
        } else {
            if (Character.isUpperCase(inputString.charAt(0)) && !Character.isUpperCase(inputString.charAt(1))) {
                answer = inputString.substring(0, 1).toLowerCase(Locale.US) + inputString.substring(1);
            } else {
                answer = inputString;
            }
        }
        return answer;
    }

    
    public static String getSetterMethodName(String property) {
        StringBuilder sb = new StringBuilder();

        sb.append(property);
        if (Character.isLowerCase(sb.charAt(0))) {
            if (sb.length() == 1 || !Character.isUpperCase(sb.charAt(1))) {
                sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
            }
        }
        sb.insert(0, "set");
        return sb.toString();
    }

    
    public static String getGetterMethodName(String property) {
        StringBuilder sb = new StringBuilder();

        sb.append(property);
        if (Character.isLowerCase(sb.charAt(0))) {
            if (sb.length() == 1 || !Character.isUpperCase(sb.charAt(1))) {
                sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
            }
        }
        sb.insert(0, "get");
        return sb.toString();
    }

    public static void main(String[] args) {
        System.out.println(JavaBeanUtil.toUnderlineString("ISOCertifiedStaff"));
        System.out.println(JavaBeanUtil.getValidPropertyName("CertifiedStaff"));
        System.out.println(JavaBeanUtil.getSetterMethodName("userID"));
        System.out.println(JavaBeanUtil.getGetterMethodName("userID"));
        System.out.println(JavaBeanUtil.toCamelCaseString("iso_certified_staff", true));
        System.out.println(JavaBeanUtil.getValidPropertyName("certified_staff"));
        System.out.println(JavaBeanUtil.toCamelCaseString("site_Id"));
    }
}