package org.apache.maven.usability;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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.

  */

 import org.apache.maven.plugin.MojoFailureException;

 import org.apache.maven.usability.diagnostics.DiagnosisUtils;

 import org.apache.maven.usability.diagnostics.ErrorDiagnoser;

 public class MojoFailureExceptionDiagnoser

     implements ErrorDiagnoser

 {

     public boolean canDiagnose( Throwable error )

     {

         return DiagnosisUtils.containsInCausality( error, MojoFailureException.class );

     }

     public String diagnose( Throwable error )

     {

         MojoFailureException mfe =

             (MojoFailureException) DiagnosisUtils.getFromCausality( error, MojoFailureException.class );

         StringBuffer message = new StringBuffer();

         Object source = mfe.getSource();

         if ( source != null )

         {

             message.append( ": " ).append( mfe.getSource() ).append( "\n" );

         }

         String shortMessage = mfe.getMessage();

         if ( shortMessage != null )

         {

             message.append( shortMessage );

         }

         String longMessage = mfe.getLongMessage();

         // the indexOf bit is very strange, but the compiler output for 1.5 source compiled using JDK 1.4 presents this case!

         if ( longMessage != null && !longMessage.equals( shortMessage ) && shortMessage.indexOf( longMessage ) < 0 )

         {

             message.append( "\n\n" ).append( longMessage );

         }

         return message.toString();

     }

 }