cvs commit: jakarta-ant/proposal/myrmidon/src/java/org/apache/antlib/core Fail.java

[do...@apache.org]

donaldp     01/12/17 02:49:06

  Added:       proposal/myrmidon/src/java/org/apache/antlib/core Fail.java
  Log:
  Add a fail task similar to ant1.xs except that it also has a condition.
  
  Revision  Changes    Path
  1.1                  jakarta-ant/proposal/myrmidon/src/java/org/apache/antlib/core/Fail.java
  
  Index: Fail.java
  ===================================================================
  /*
   * Copyright (C) The Apache Software Foundation. All rights reserved.
   *
   * This software is published under the terms of the Apache Software License
   * version 1.1, a copy of which has been included with this distribution in
   * the LICENSE file.
   */
  package org.apache.antlib.core;
  
  import org.apache.avalon.framework.context.ContextException;
  import org.apache.myrmidon.api.AbstractTask;
  import org.apache.myrmidon.api.TaskException;
  import org.apache.myrmidon.framework.Condition;
  
  /**
   * This is a task used to throw a TaskException.
   * Useful for forcing a build to fail on a certain condition.
   *
   * @author <a href="mailto:peter@apache.org">Peter Donald</a>
   */
  public class Fail
      extends AbstractTask
  {
      private String m_message;
      private Condition m_condition;
  
      public void setMessage( final String message )
      {
          checkNullMessage();
          m_message = message;
      }
  
      public void addContent( final String message )
      {
          checkNullMessage();
          m_message = message;
      }
  
      public void setIf( final String ifCondition )
      {
          checkNullCondition();
          m_condition = new Condition( true, ifCondition );
      }
  
      public void setUnless( final String unlessCondition )
      {
          checkNullCondition();
          m_condition = new Condition( false, unlessCondition );
      }
  
      public void execute()
          throws TaskException
      {
          if( null == m_condition )
          {
              throw new TaskException( "Use did not specify a condition" );
          }
  
          try
          {
              final boolean failed =
                  m_condition.evaluate( getContext() );
  
              if( failed )
              {
                  if( null != m_message )
                  {
                      throw new TaskException( m_message );
                  }
                  else
                  {
                      throw new TaskException();
                  }
              }
          }
          catch( final ContextException ce )
          {
              throw new TaskException( ce.toString(), ce );
          }
      }
  
      private void checkNullMessage()
      {
          if( null != m_message )
          {
              final String message = "Message can only be set once by " +
                  "either nested content or the message attribute";
              throw new IllegalStateException( message );
          }
      }
  
      private void checkNullCondition()
      {
          if( null != m_condition )
          {
              throw new IllegalStateException( "Condition already set!" );
          }
      }
  }
  
  
  

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