CommandDispatcher.java

package com.processpuzzle.application.control.control;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;

import com.processpuzzle.application.configuration.control.ServletHelper;
import com.processpuzzle.file.control.MultipartManager;

/**
 * Instances turn a request into a command, which may then be executed.
 * 
 * @pattern Command (role=commandDispatcher)
 * @generatedBy CodePro at 2005.11.13. 6:28
 * @author zsolt.zsuffa
 * @version $Revision$
 */
public class CommandDispatcher {
   public static final java.lang.String ACTION_PARAMETER_NAME = "action";
   private javax.servlet.http.HttpServletRequest request;
   private javax.servlet.http.HttpServletResponse response;
   private ServletContext servletContext;
   private java.util.Properties properties; // The properties associated with the request.
   private Map<String, Collection<String>> propertyValues = new HashMap<String, Collection<String>>();

   public CommandDispatcher( HttpServletRequest request, HttpServletResponse response, ServletContext servletContext ) {
      this.request = request;
      this.response = response;
      this.servletContext = servletContext;
      this.properties = new ServletHelper().extractProperties( request );
      resolveMultipartContent( request, properties );
   }

   public String executeCommand() throws Exception {
      CommandInterface command = getCommand();
      if( command == null ){
         command = new UnknownFrontCommand( getProperties().getProperty( ACTION_PARAMETER_NAME ) );
      }
      command.init( this );
      return command.execute( this );
   }

   // Public setters and getters
   public Properties getProperties() {
      return properties;
   }

   public Map<String, Collection<String>> getPropertyValues() {
      return propertyValues;
   }

   public HttpServletRequest getRequest() {
      return request;
   }

   public HttpServletResponse getResponse() {
      return response;
   }

   public ServletContext getServletContext() {
      return servletContext;
   }

   // Private helper methods
   private CommandInterface getCommand() {
      String param = getProperties().getProperty( ACTION_PARAMETER_NAME );
      if( param == null ){
         param = "UnknownFrontCommand";
      }
      return CommandFactory.getCommand( param );
   }

   private void resolveMultipartContent( HttpServletRequest request, Properties properties ) {
      MultipartManager mm = new MultipartManager( request );
      if( mm.isMultipartContent() ){
         mm.processRequest();
         List<?> formItems = mm.getFormItems();
         Iterator<?> i = formItems.iterator();
         while( i.hasNext() ){
            FileItem item = (FileItem) i.next();
            if( item.isFormField() ){ // form field
               String value;
               try{
                  value = item.getString( "UTF-8" );
               }catch( UnsupportedEncodingException e ){
                  value = item.getString();
               }
               String name = item.getFieldName();
               if( properties.containsKey( name ) ){
                  Collection<String> values = new ArrayList<String>();
                  values.add( properties.getProperty( name ) );
                  values.add( value );
                  propertyValues.put( name, values );
                  properties.remove( name );
               }else if( propertyValues.containsKey( name ) ){
                  ((ArrayList<String>) propertyValues.get( name )).add( value );
               }else
                  properties.put( name, value );
            }
         }
      }
   }
}

/*
 * $CPS$ This comment was generated by CodePro. Do not edit it. patternId = com.instantiations.assist.eclipse.pattern.frontControllerPattern strategyId =
 * com.instantiations.assist.eclipse.pattern.frontControllerPattern.frontController abstract = false commandInterface = CommandInterface commandInterfaces =
 * commands = Show, Browse, Save, Delete, New deploy = true dispatchClass = CommandDispatcher dispatchSuperclass = java.lang.Object factoryClass =
 * CommandFactory factorySuperclass = java.lang.Object final = false propertyFile = commandMapping.properties public = true publicCommand = true servletClass =
 * CommandControllerServlet servletInterfaces = servletPackage = com.itcodex.objectpuzzle.framework.control servletPackage.sourceFolder = ObjectPuzzle Framework
 * Web Tier/JavaSource servletParameter = action servletSuperclass = javax.servlet.http.HttpServlet singleThread = false supportPackage =
 * com.itcodex.objectpuzzle.framework.control supportPackage.sourceFolder = ObjectPuzzle Framework Web Tier/JavaSource
 */