// XAAL toolkit
// Copyright (C) 2009 Ville Karavirta <vkaravir(a)cs.hut.fi>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
package xaal.util;

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

/**
 * @author vkaravir
 * 
 * To change the template for this generated type comment go to
 * Window&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments
 */
public class ReflectionHelper {

    /**
     *  
     */
    public ReflectionHelper() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @param prop
     * @param class1
     * @return
     */
    public static Method getSetterMethod(String prop, Class cls) {
        String name = "set" + prop.substring(0, 1).toUpperCase()
                + prop.substring(1);
        Method[] m = cls.getMethods();
        int i = 0;
        while (!m[i].getName().equalsIgnoreCase(name)) {
            i++;
            if (i == m.length)
                return null;
        }
        return m[i];
    }

    /**
     * @param m
     * @param property
     * @return
     * @throws InvocationTargetException
     * @throws IllegalAccessException
     * @throws IllegalArgumentException
     */
    public static boolean invoke(Method m, String property, Object target)
            throws IllegalArgumentException, IllegalAccessException,
            InvocationTargetException {
        Class[] types = m.getParameterTypes();
        if (types.length > 1)
            return false;
        if (types.length == 0) {
            m.invoke(target, null);
            return true;
        }
        Object[] param = null;
        if (types[0].isAssignableFrom(Integer.TYPE)) { // int
            param = new Object[] { new Integer(property) };
        } else if (types[0].isAssignableFrom(property.getClass())) { // String
            param = new Object[] { property };
        } else if (types[0].isAssignableFrom(Boolean.TYPE)) { // boolean
            param = new Object[] { Boolean.valueOf(property) };
        }
        m.invoke(target, param);
        return true;
    }

    public static Object invoke(Object param, Object target, String method) {
        Class c = param.getClass();
        Method m = getMethod(new Class[] { c }, target.getClass(), method);
        while (m == null && c != null) {
            c = c.getSuperclass();
            m = getMethod(new Class[] { c }, target.getClass(), method);
        }
        try {
            if (m != null)
                return m.invoke(target, new Object[] { param });
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

    public static Object invoke(Object[] param, Object target, String method) {
        Class[] c = new Class[param.length];
        for (int i = 0; i < param.length; i++)
			c[i] = param[i].getClass();
        Method m = getMethod(c, target.getClass(), method);
        // TODO Enable this
/*        while (m == null) {
            c = c.getSuperclass();
            m = getMethod(c, target.getClass(), method);
        }*/
        try {
            return m.invoke(target, param);
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

    private static Method getMethod(Class[] param, Class cls, String method) {
        try {
            Method m = cls.getMethod(method, param);
            return m;
        } catch (SecurityException e) {
            //e.printStackTrace();
            return null;
        } catch (NoSuchMethodException e) {
            //e.printStackTrace();
            return null;
        }
    }

    public static Object getInstanceOfClass(String className) {
        try {
            return Class.forName(className).newInstance();
        } catch (InstantiationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
        // TODO Constructors with parameters??        
    }

}