/*
 * Copyright (c) 2003, 2018 Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2022 Contributors to the Eclipse Foundation
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.jdbcra.util;

import jakarta.resource.ResourceException;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Execute the methods based on the parameters.
 *
 * @version        1.0, 02/07/23
 * @author        Binod P.G
 */
public class MethodExecutor implements java.io.Serializable{

    private static Logger _logger;
    static {
        _logger = Logger.getAnonymousLogger();
    }
    private final boolean debug = false;
    /**
     * Exceute a simple set Method.
     *
     * @param        value        Value to be set.
     * @param        method        <code>Method</code> object.
     * @param        obj        Object on which the method to be executed.
     * @throws  <code>ResourceException</code>, in case of the mismatch of parameter values or
     *                a security violation.
     */
    public void runJavaBeanMethod(String value, Method method, Object obj) throws ResourceException{
            if (value==null || value.trim().equals("")) {
                return;
            }
            try {
                Class[] parameters = method.getParameterTypes();
                if ( parameters.length == 1) {
                    Object[] values = new Object[1];
                        values[0] = convertType(parameters[0], value);
                        method.invoke(obj, values);
                }
            } catch (IllegalAccessException iae) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", iae);
                throw new ResourceException("Access denied to execute the method :" + method.getName());
            } catch (IllegalArgumentException ie) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", ie);
                throw new ResourceException("Arguments are wrong for the method :" + method.getName());
            } catch (InvocationTargetException ite) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", ite);
                throw new ResourceException("Access denied to execute the method :" + method.getName());
            }
    }

    /**
     * Executes the method.
     *
     * @param        method <code>Method</code> object.
     * @param        obj        Object on which the method to be executed.
     * @param        values        Parameter values for executing the method.
     * @throws  <code>ResourceException</code>, in case of the mismatch of parameter values or
     *                a security violation.
     */
    public void runMethod(Method method, Object obj, Vector values) throws ResourceException{
            try {
            Class[] parameters = method.getParameterTypes();
            if (values.size() != parameters.length) {
                return;
            }
                Object[] actualValues = new Object[parameters.length];
                for (int i =0; i<parameters.length ; i++) {
                        String val = (String) values.get(i);
                        if (val.trim().equals("NULL")) {
                            actualValues[i] = null;
                        } else {
                            actualValues[i] = convertType(parameters[i], val);
                        }
                }
                method.invoke(obj, actualValues);
            }catch (IllegalAccessException iae) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", iae);
                throw new ResourceException("Access denied to execute the method :" + method.getName());
            } catch (IllegalArgumentException ie) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", ie);
                throw new ResourceException("Arguments are wrong for the method :" + method.getName());
            } catch (InvocationTargetException ite) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", ite);
                throw new ResourceException("Access denied to execute the method :" + method.getName());
            }
    }

    /**
     * Converts the type from String to the Class type.
     *
     * @param        type                Class name to which the conversion is required.
     * @param        parameter        String value to be converted.
     * @return        Converted value.
     * @throws  <code>ResourceException</code>, in case of the mismatch of parameter values or
     *                a security violation.
     */
    private Object convertType(Class type, String parameter) throws ResourceException{
            try {
                String typeName = type.getName();
                if ( typeName.equals("java.lang.String") || typeName.equals("java.lang.Object")) {
                        return parameter;
                }

                if (typeName.equals("int") || typeName.equals("java.lang.Integer")) {
                        return new Integer(parameter);
                }

                if (typeName.equals("short") || typeName.equals("java.lang.Short")) {
                        return new Short(parameter);
                }

                if (typeName.equals("byte") || typeName.equals("java.lang.Byte")) {
                        return new Byte(parameter);
                }

                if (typeName.equals("long") || typeName.equals("java.lang.Long")) {
                        return new Long(parameter);
                }

                if (typeName.equals("float") || typeName.equals("java.lang.Float")) {
                        return new Float(parameter);
                }

                if (typeName.equals("double") || typeName.equals("java.lang.Double")) {
                        return new Double(parameter);
                }

                if (typeName.equals("java.math.BigDecimal")) {
                        return new java.math.BigDecimal(parameter);
                }

                if (typeName.equals("java.math.BigInteger")) {
                        return new java.math.BigInteger(parameter);
                }

                if (typeName.equals("boolean") || typeName.equals("java.lang.Boolean")) {
                        return new Boolean(parameter);
            }

                return parameter;
            } catch (NumberFormatException nfe) {
            _logger.log(Level.SEVERE, "jdbc.exc_nfe", parameter);
                throw new ResourceException(parameter+": Not a valid value for this method ");
            }
    }

}