/*

 *

 * ====================================================================

 *

 * Copyright 2004 The Apache Software Foundation 

 *

 * 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 org.apache.commons.contract.util;

 import java.io.BufferedReader;

 import java.io.IOException;

 import java.io.InputStreamReader;

 import java.util.HashMap;

 import java.util.Locale;

 import java.util.Map;

 import org.apache.commons.contract.Context;

 import org.apache.commons.contract.ContractViolationException;

 import org.apache.commons.contract.Executor;

 import org.apache.commons.contract.Processor;

 import org.apache.commons.contract.Result;

 import org.apache.commons.contract.context.VMContext;

 import org.apache.commons.contract.descriptor.ParameterDescriptor;

 import org.apache.commons.contract.i18n.ParameterBundle;

 public class InteractiveMainWrapper extends MainWrapper {

     public static Result main(String []args, Processor processor) {

         Executor.init();

         printUsage(processor);

         Context context = new VMContext();

         ParameterDescriptor[] parameterDescriptors = processor.getParameterDescriptors();

         Map parameters = new HashMap();

         BufferedReader in = new BufferedReader( new InputStreamReader( System.in ) );

         for ( int i = 0; i < parameterDescriptors.length; i++ ) {

             Object value = null;

             do {

                 System.out.print(parameterDescriptors[i].getName()+" - ");

             printParameterInfo(parameterDescriptors[i]);

             System.out.print(((ParameterBundle)parameterDescriptors[i].getDescription()).getPrompt(Locale.getDefault()));

             try {

                 String userInput = in.readLine();

                 value = Executor.prepareValue(parameterDescriptors[i], userInput, context);

             } catch (IOException e) {

                 value = null;

             } catch (ContractViolationException e) {

                 printException(e);

                 value = null;

             }

             } while ( value == null );

             parameters.put(parameterDescriptors[i].getName(), value);

         }

         try {

             Result result = Executor.process(processor, parameters, context);

             printInformations(context.getInformations());

             return result;

         } catch ( ContractViolationException exception ) {

             printException(exception);

             System.out.println();

             printUsage(processor);

         } catch ( Exception exception ) {

             exception.printStackTrace();

         }

         return null;

     }

 }