001/* 
002 * JKNIV, whinstone one contract to access your database.
003 * 
004 * Copyright (C) 2017, the original author or authors.
005 *
006 * This library is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 2.1 of the License.
010 * 
011 * This library is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 * 
016 * You should have received a copy of the GNU Lesser General Public
017 * License along with this library; if not, write to the Free Software Foundation, Inc., 
018 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
019 */
020package net.sf.jkniv.whinstone;
021
022/**
023 * Convert string names from <code>underscore</code> 
024 * to <code>camel case</code> java attribute style,
025 * underscores or dashes which is skipped.
026 * 
027 * <p>For example <tt>CUSTOMER_ID</tt> is mapped as <tt>customerId</tt>.</p>
028 * 
029 * @author Alisson Gomes
030 */
031public class UnderscoreToCamelCaseMapper implements JdbcColumnMapper
032{
033    public String map(final String column)
034    {
035        StringBuilder sb = new StringBuilder();
036        boolean toUpper = false;
037        char[] columnCopy = null;
038        if(column.indexOf(".") < 0)
039            columnCopy = column.toLowerCase().toCharArray();
040        else 
041            columnCopy = column.toCharArray();
042        for (char ch : columnCopy)
043        {
044            char cased = ch;
045            if (ch == '_' || ch == '-')
046            {
047                toUpper = true;
048                continue;
049            }
050            if (toUpper)
051            {
052                cased = Character.toUpperCase(ch);
053                toUpper = false;
054            }
055            sb.append(cased);
056        }
057        return sb.toString();
058    }
059}