How to have multiple public classes in one file for spring?

[Siegfried Heintze]

I'm trying to instantiate some classes using spring with java. This is working.

I'm trying to apply this to some automated code generation and I would like to have all my code in a single file.

Unfortunately, java only lets me have one public class in each source code file. When spring tries to instantiate classes that are not public, it cannot.

Is there a way around this java constraint? Maybe some scripting language like groovy?

Thanks,
Siegfried

[Siegfried Heintze]

Yup, it works with groovy. Apparently groovy ignores the keyword public in front of classes and makes all classes public.

 
/*
 * Begin commands to execute this file using Groovy with bash
 * if [ `uname` == 'Linux' ]
 * then
 * export CLASSPATH=build:.
 * else
 * export CLASSPATH=build\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\spring.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-aop.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-beans.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-context-support.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-context.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-core.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modul es\\spring-jdbc.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-jms.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-orm.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-test.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-tx.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-web.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-webmvc-portlet.jar\;c\:\\dev\\spring\\spring-framework-2.5\\di st\\modules\\spring-webmvc-struts.jar\;c\:\\dev\\spring\\spring-framework-2.5\\dist\\modules\\spring-webmvc.jar\;c\:\\dev\\spring\\spring-framework-2.5\\lib\\jakarta-commons\\*\;.\;${GROOVY_HOME}\\embeddable\\groovy-all-1.5.0.jar
 * fi
 * if [ -e "build" ]
 * then
 * echo "already have build directory"
 * rm -rf build
 * mkdir build
 * else
 * echo "mkdir build"
 * mkdir build
 * fi
 * if [ -e "com" ]
 * then
 * echo "delete old com dir"
 * rm -rf com
 * fi
 * cp ../../../../../../../../../../sia2/Chapter01/Hello/src/main/resources/HelloLocal.xml ./build/HelloLocal.xml
 * cp ../../../../../../../../../../sia2/Chapter01/Hello/src/main/resources/HelloLocal.xml .
 * echo "groovyc HelloGroovyApp.groovy  "
 * groovyc -d build HelloGroovyApp.groovy
 * echo " java  com.springinaction.chapter01.hello.HelloGroovyApp  HelloLocal.xml "
 * java  com.springinaction.chapter01.hello.HelloGroovyApp  HelloLocal.xml 
 * echo " java  com.springinaction.chapter01.hello.HelloGroovyApp  HelloLocal.xml <<EOF"
 * java  com.springinaction.chapter01.hello.HelloGroovyApp  <<EOF
 * <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
 * <!-- 
 * <?xml version="1.0" encoding="UTF-8"?>
 * 
 * <beans xmlns="http://www.springframework.org/schema/beans"
 *    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 *    xsi:schemaLocation="http://www.springframework.org/schema/beans 
 *        <a href="http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">" target="_blank" rel="nofollow">http://www.springframework.org/schema/beans/spring-beans-2.0.xsd"></a>
 *  -->
 *  <beans>
 *   <bean id="greetingServiceSpanish"
 *       class="com.springinaction.chapter01.hello.GreetingServiceLocalImpl">
 *       <!--
 *     <property name="greeting" value="Buenos Dias!" />
 *     -->
 *       <property name="greeting">
 *             <value>Buenos Dias!</value>
 *       </property>
 *   </bean>
 *   <bean id="greetingServiceEnglish"
 *       class="com.springinaction.chapter01.hello.GreetingServiceLocalImpl">
 *         <property name="greeting">
 *             <value>Good Day!</value>
 *         </property>
 *   </bean>
 *   <bean id="greetingServiceGerman"
 *       class="com.springinaction.chapter01.hello.GreetingServiceLocalImpl">
 *         <property name="greeting">
 *             <value>Guten Tag!</value>
 *         </property>
 *   </bean>
 * </beans>
 * EOF
 * End commands to execute this file using Groovy with bash
 *
 */
package com.springinaction.chapter01.hello;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.InputStreamResource;
 

public class HelloGroovyApp {
/**
 * Demonstrate basic spring features.
     *
 * @author Siegfried Heintze
 * 
 */
  static java.io.PrintStream out = System.out;
  ClassPathResource cpr;
  /**
   * Read from standard input.
   */
  InputStreamResource isr = new InputStreamResource(System.in, "standard input");
  /**
   * Constructor
   * @param args command line arguments
   */
  public HelloGroovyApp(String[] args){
      cpr = args.length>0?new ClassPathResource(args[0]):null;
 
      //BeanFactory factory =  new XmlBeanFactory(cpr);
      BeanFactory factory = new DefaultListableBeanFactory();
      org.springframework.core.io.AbstractResource ar = args.length>0?new ClassPathResource(args[0]):new InputStreamResource(System.in, "standard input");
      XmlBeanDefinitionReader reader = new  XmlBeanDefinitionReader(factory);
      reader.setValidating(ar instanceof ClassPathResource);
      reader.loadBeanDefinitions(ar);
 

      IGreetingService greetingService = (IGreetingService) factory.getBean("greetingServiceEnglish");
      greetingService.sayGreeting();
      ((IGreetingService) factory.getBean("greetingServiceSpanish")).sayGreeting();
      ((IGreetingService) factory.getBean("greetingServiceGerman")).sayGreeting();
  }
  public static void main(String[] args) throws Exception {
    HelloGroovyApp hello = new HelloGroovyApp(args);
  }
}
public interface IGreetingService {
  public void sayGreeting();
}
class GreetingServiceLocalImpl implements IGreetingService {
  private String greeting;
  public GreetingServiceLocalImpl() {}
  public GreetingServiceLocalImpl(String greeting) {   this.greeting = greeting;  }
  public void sayGreeting() {  System.out.println("Local:"+greeting);  }
  public void setGreeting(String greeting) {  this.greeting = greeting;  }
}