com.somnus.spring.validation.Main.java Source code

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Here is the source code for com.somnus.spring.validation.Main.java

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/*
 * Copyright 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.somnus.spring.validation;

import java.util.Scanner;
import java.util.Set;

import org.hibernate.validator.method.MethodConstraintViolation;
import org.hibernate.validator.method.MethodConstraintViolationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.somnus.spring.validation.service.BusinessService;

/**
 * Executes the example to illustrate the usage of method validation with 
 * Hibernate Validator together with Spring.  
 *
 * @author Gunnar Hillert
 * @version 1.0
 *
 */
public final class Main {

    private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);

    private Main() {
    }

    /**
     * Load the Spring Integration Application Context
     *
     * @param args - command line arguments
     */
    public static void main(final String... args) {

        LOGGER.info("\n========================================================="
                + "\n                                                         "
                + "\n          Welcome!                                       "
                + "\n                                                         "
                + "\n    For more information please visit:                   "
                + "\n    http://blog.hillert.com                              "
                + "\n                                                         "
                + "\n=========================================================");

        final AbstractApplicationContext context = new ClassPathXmlApplicationContext(
                "classpath:META-INF/spring/*-context.xml");

        context.registerShutdownHook();

        final Scanner scanner = new Scanner(System.in).useDelimiter("\n");

        final BusinessService service = context.getBean(BusinessService.class);

        LOGGER.info("\n========================================================="
                + "\n                                                         "
                + "\n    Please press 'q + Enter' to quit the application.    "
                + "\n                                                         "
                + "\n=========================================================");

        System.out.println("Please enter a string and press <enter>: ");

        while (true) {

            System.out.print("$ ");
            String input = scanner.nextLine();

            LOGGER.debug("Input string: '{}'", input);

            if ("q".equalsIgnoreCase(input)) {
                break;
            } else if ("null".equals(input)) {
                input = null;
            }

            try {
                System.out.println("Converted to upper-case: " + service.convertToUpperCase(input));
            } catch (MethodConstraintViolationException e) {
                Set<MethodConstraintViolation<?>> constraintViolations = e.getConstraintViolations();
                LOGGER.info("Method Validation failed with {} error(s).", constraintViolations.size());

                for (MethodConstraintViolation<?> violation : e.getConstraintViolations()) {
                    LOGGER.info("Method Validation: {}", violation.getPropertyPath().toString());
                    LOGGER.info("Method Validation: {}", violation.getConstraintDescriptor());
                    LOGGER.info("Method Validation: {}", violation.getMessage());
                }

            }
        }

        LOGGER.info("Exiting application...bye.");

        System.exit(0);

    }
}