Glassfish example source code file (MethodExecutor.java)

This example Glassfish source code file (MethodExecutor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

class, illegalaccessexception, illegalargumentexception, invocationtargetexception, invocationtargetexception, log, logging, null, object, object, reflection, resourceexception, resourceexception, string, string, stringmanager, util, vector

The Glassfish MethodExecutor.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.gjc.util;

import com.sun.enterprise.util.i18n.StringManager;
import com.sun.gjc.common.DataSourceObjectBuilder;
import com.sun.logging.LogDomains;

import javax.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.
 *
 * @author Binod P.G
 * @version 1.0, 02/07/23
 */
public class MethodExecutor implements java.io.Serializable {

    private static Logger _logger;

    static {
        _logger = LogDomains.getLogger(MethodExecutor.class, LogDomains.RSR_LOGGER);
    }

    private boolean debug = false;

    private static StringManager sm = StringManager.getManager(
            DataSourceObjectBuilder.class);

    /**
     * Exceute a simple set Method.
     *
     * @param value  Value to be set.
     * @param method <code>Method object.
     * @param obj    Object on which the method to be executed.
     * @throws <code>ResourceException,
     *          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", value);
            _logger.log(Level.SEVERE, "", iae);
            String msg = sm.getString("me.access_denied", method.getName());
            throw new ResourceException(msg);
        } catch (IllegalArgumentException ie) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", value);
            _logger.log(Level.SEVERE, "", ie);
            String msg = sm.getString("me.illegal_args", method.getName());
            throw new ResourceException(msg);
        } catch (InvocationTargetException ite) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", value);
            _logger.log(Level.SEVERE, "", ite);
            String msg = sm.getString("me.access_denied", method.getName());
            throw new ResourceException(msg);
        }
    }

    /**
     * Executes the method.
     *
     * @param method <code>Method object.
     * @param obj    Object on which the method to be executed.
     * @param values Parameter values for executing the method.
     * @throws <code>ResourceException,
     *          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", values);
            _logger.log(Level.SEVERE, "", iae);
            String msg = sm.getString("me.access_denied", method.getName());
            throw new ResourceException(msg);
        } catch (IllegalArgumentException ie) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", values);
            _logger.log(Level.SEVERE, "", ie);
            String msg = sm.getString("me.illegal_args", method.getName());
            throw new ResourceException(msg);
        } catch (InvocationTargetException ite) {
            _logger.log(Level.SEVERE, "jdbc.exc_jb_val", values);
            _logger.log(Level.SEVERE, "", ite);
            String msg = sm.getString("me.access_denied", method.getName());
            throw new ResourceException(msg);
        }
    }

    /**
     * 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,
     *          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 Boolean.valueOf(parameter);
            }

            return parameter;
        } catch (NumberFormatException nfe) {
            _logger.log(Level.SEVERE, "jdbc.exc_nfe", parameter);
            String msg = sm.getString("me.invalid_param", parameter);
            throw new ResourceException(msg);
        }
    }

}