Quadcap Embeddable Server

com/quadcap/http/servlets/jsp/PropertyUtils.java

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package com.quadcap.http.servlets.jsp;

/* Copyright 1999 - 2003 Quadcap Software.  All rights reserved.
 *
 * This software is distributed under the Quadcap Free Software License.
 * This software may be used or modified for any purpose, personal or
 * commercial.  Open Source redistributions are permitted.  Commercial
 * redistribution of larger works derived from, or works which bundle
 * this software requires a "Commercial Redistribution License"; see
 * http://www.quadcap.com/purchase.
 *
 * Redistributions qualify as "Open Source" under  one of the following terms:
 *   
 *    Redistributions are made at no charge beyond the reasonable cost of
 *    materials and delivery.
 *
 *    Redistributions are accompanied by a copy of the Source Code or by an
 *    irrevocable offer to provide a copy of the Source Code for up to three
 *    years at the cost of materials and delivery.  Such redistributions
 *    must allow further use, modification, and redistribution of the Source
 *    Code under substantially the same terms as this license.
 *
 * Redistributions of source code must retain the copyright notices as they
 * appear in each source code file, these license terms, and the
 * disclaimer/limitation of liability set forth as paragraph 6 below.
 *
 * Redistributions in binary form must reproduce this Copyright Notice,
 * these license terms, and the disclaimer/limitation of liability set
 * forth as paragraph 6 below, in the documentation and/or other materials
 * provided with the distribution.
 *
 * The Software is provided on an "AS IS" basis.  No warranty is
 * provided that the Software is free of defects, or fit for a
 * particular purpose.  
 *
 * Limitation of Liability. Quadcap Software shall not be liable
 * for any damages suffered by the Licensee or any third party resulting
 * from use of the Software.
 */

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.servlet.http.HttpServletRequest;

import com.quadcap.util.Debug;

/**
 * Utility functions to support getProp and setProp.
 *
 * @author Stan Bailes
 */
public class PropertyUtils {
    public static void setPropertiesFromRequest(Object obj, 
                                                HttpServletRequest request) 
        throws IntrospectionException, InvocationTargetException, 
               IllegalAccessException
    {
        BeanInfo info = Introspector.getBeanInfo(obj.getClass());
        PropertyDescriptor[] pds = info.getPropertyDescriptors();
        for (int i = 0; i < pds.length; i++) {
            PropertyDescriptor pd = pds[i];
            String name = pd.getName();
            String[] vals = request.getParameterValues(name);
            if (vals == null || vals.length == 0 || vals[0].length() == 0) continue;
            Class pt = pd.getPropertyType();
            if (pt.isArray()) {
                setProps(obj, pd, vals);
            } else {
                setProp(obj, pd, vals[0]);
            }
        }
    }

    public static void setPropertyFromRequestParameter(Object obj,
                                                       HttpServletRequest request,
                                                       String name)
        throws IntrospectionException, InvocationTargetException, 
               IllegalAccessException
    {
        BeanInfo info = Introspector.getBeanInfo(obj.getClass());
        PropertyDescriptor[] pds = info.getPropertyDescriptors();
        for (int i = 0; i < pds.length; i++) {
            PropertyDescriptor pd = pds[i];
            String pname = pd.getName();
            if (!name.equals(pname)) continue;
            String[] vals = request.getParameterValues(name);
            if (vals == null || vals.length == 0 || vals[0].length() == 0) continue;
            Class pt = pd.getPropertyType();
            Debug.println("pt.isArray() = " + pt.isArray());
            if (pt.isArray()) {
                setProps(obj, pd, vals);
            } else {
                setProp(obj, pd, vals[0]);
            }
        }
    }

    public static void setPropertyFromValue(Object obj, String name, String val)
        throws IntrospectionException, InvocationTargetException, 
               IllegalAccessException
    {
        BeanInfo info = Introspector.getBeanInfo(obj.getClass());
        PropertyDescriptor[] pds = info.getPropertyDescriptors();
        for (int i = 0; i < pds.length; i++) {
            PropertyDescriptor pd = pds[i];
            String pname = pd.getName();
            if (name.equals(pname)) {
                setProp(obj, pd, val);
            }
        }
    }

    public static void setProp(Object obj, PropertyDescriptor pd, String val)
        throws IntrospectionException, InvocationTargetException, 
               IllegalAccessException
    {
        Class pt = pd.getPropertyType();
        Method w = pd.getWriteMethod();
        Object[] args = new Object[1];

        if (pt.getName().equals("java.lang.Boolean")) {
            args[0] = Boolean.valueOf(val);
        } else if (pt.getName().equals("java.lang.Integer")) {
            args[0] = Integer.valueOf(val);
        } else if (pt.getName().equals("java.lang.Byte")) {
            args[0] = Byte.valueOf(val);
        } else if (pt.getName().equals("java.lang.Short")) {
            args[0] = Short.valueOf(val);
        } else if (pt.getName().equals("java.lang.Long")) {
            args[0] = Long.valueOf(val);
        } else if (pt.getName().equals("java.lang.Double")) {
            args[0] = Double.valueOf(val);
        } else if (pt.getName().equals("java.lang.Float")) {
            args[0] = Float.valueOf(val);
        } else if (pt.getName().equals("java.lang.Integer")) {
            args[0] = Integer.valueOf(val);
        } else if (pt.getName().equals("java.lang.String")) {
            args[0] = val;
        } 
        w.invoke(obj, args);
    }

    public static void setProps(Object obj, PropertyDescriptor pd, String[] vals)
        throws IntrospectionException, InvocationTargetException, 
               IllegalAccessException
    {
        Class pat = pd.getPropertyType();
        Class pt = pat.getComponentType();
        Method w = pd.getWriteMethod();
        Object[] args = new Object[1];

        if (pt.getName().equals("java.lang.Boolean")) {
            Boolean[] args1 = new Boolean[vals.length];
            args[0] = args1;
            for (int i = 0; i < vals.length; i++) {
                args1[i] = Boolean.valueOf(vals[i]);
            }
        } else if (pt.getName().equals("java.lang.Integer")) {
            Integer[] args1 = new Integer[vals.length];
            args[0] = args1;
            for (int i = 0; i < vals.length; i++) {
                args1[i] = Integer.valueOf(vals[i]);
            }
        } else if (pt.getName().equals("java.lang.Byte")) {
            Byte[] args1 = new Byte[vals.length];
            args[0] = args1;
            for (int i = 0; i < vals.length; i++) {
                args1[i] = Byte.valueOf(vals[i]);
            }
        } else if (pt.getName().equals("java.lang.Short")) {
            Short[] args1 = new Short[vals.length];
            args[0] = args1;
            for (int i = 0; i < vals.length; i++) {
                args1[i] = Short.valueOf(vals[i]);
            }
        } else if (pt.getName().equals("java.lang.Long")) {
            Long[] args1 = new Long[vals.length];
            args[0] = args1;
            for (int i = 0; i < vals.length; i++) {
                args1[i] = Long.valueOf(vals[i]);
            }
        } else if (pt.getName().equals("java.lang.Double")) {
            Double[] args1 = new Double[vals.length];
            args[0] = args1;
            for (int i = 0; i < vals.length; i++) {
                args1[i] = Double.valueOf(vals[i]);
            }
        } else if (pt.getName().equals("java.lang.Float")) {
            Float[] args1 = new Float[vals.length];
            args[0] = args1;
            for (int i = 0; i < vals.length; i++) {
                args1[i] = Float.valueOf(vals[i]);
            }
        } else if (pt.getName().equals("java.lang.String")) {
            args[0] = vals;
        }
        w.invoke(obj, args);
    }

    public static String getProperty(Object obj, String name) 
        throws IntrospectionException, InvocationTargetException, 
               IllegalAccessException
    {
        
        BeanInfo info = Introspector.getBeanInfo(obj.getClass());
        PropertyDescriptor[] pds = info.getPropertyDescriptors();
        for (int i = 0; i < pds.length; i++) {
            PropertyDescriptor pd = pds[i];
            String pname = pd.getName();
            if (name.equals(pname)) {
                Method r = pd.getReadMethod();
                Object[] args = new Object[0];
                Object res = r.invoke(obj, args);
                return String.valueOf(res);
            }
        }
        return "";
    }
}