fr.paris.lutece.util.bean.BeanUtil.java Source code

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Here is the source code for fr.paris.lutece.util.bean.BeanUtil.java

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/*
 * Copyright (c) 2002-2013, Mairie de Paris
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice
 *     and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice
 *     and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *
 *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * License 1.0
 */
package fr.paris.lutece.util.bean;

import fr.paris.lutece.portal.service.util.AppLogService;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.BeanUtils;

/**
 * Bean Utils
 */
public final class BeanUtil {
    private static final char UNDERSCORE = '_';

    /** Private constructor */
    private BeanUtil() {
    }

    /**
     * Populate a bean using parameters in http request
     * 
     * @param bean bean to populate
     * @param request http request
     */
    public static void populate(Object bean, HttpServletRequest request) {
        for (Field field : bean.getClass().getDeclaredFields()) {
            try {
                // for all boolean field, init to false
                if (field.getType().getName().equals(Boolean.class.getName())
                        || field.getType().getName().equals(boolean.class.getName())) {
                    field.setAccessible(true);
                    field.set(bean, false);
                }
            } catch (Exception e) {
                String error = "La valeur du champ " + field.getName() + " de la classe "
                        + bean.getClass().getName() + " n'a pas pu tre rcupr ";
                AppLogService.error(error);
                throw new RuntimeException(error, e);
            }
        }

        try {
            BeanUtils.populate(bean, convertMap(request.getParameterMap()));
        } catch (IllegalAccessException e) {
            AppLogService.error("Unable to fetch data from request", e);
        } catch (InvocationTargetException e) {
            AppLogService.error("Unable to fetch data from request", e);
        }
    }

    /**
     * Convert map by casifying parameters names.
     * @param mapInput The input map
     * @return The output map
     */
    public static Map<String, Object> convertMap(Map<String, Object> mapInput) {
        Map<String, Object> mapOutput = new HashMap<String, Object>();

        for (Entry<String, Object> entry : mapInput.entrySet()) {
            mapOutput.put(convertUnderscores(entry.getKey()), entry.getValue());
        }

        return mapOutput;
    }

    /**
     * Remove underscore and set the next letter in caps
     * @param strSource The source
     * @return The converted string
     */
    public static String convertUnderscores(String strSource) {
        StringBuilder sb = new StringBuilder();
        boolean bCapitalizeNext = false;

        for (char c : strSource.toCharArray()) {
            if (c == UNDERSCORE) {
                bCapitalizeNext = true;
            } else {
                if (bCapitalizeNext) {
                    sb.append(Character.toUpperCase(c));
                    bCapitalizeNext = false;
                } else {
                    sb.append(c);
                }
            }
        }

        return sb.toString();
    }
}