package org.apache.maven.resolver.internal.ant.types;
   
   /*
    * 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 java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.Task;
  import org.apache.tools.ant.types.DataType;
  import org.apache.tools.ant.types.Reference;
  
  /**
   */
  public class Exclusion
      extends DataType
  {
  
      private static final String WILDCARD = "*";
  
      private String groupId;
  
      private String artifactId;
  
      private String classifier;
  
      private String extension;
  
      protected Exclusion getRef()
      {
          return (Exclusion) getCheckedRef();
      }
  
      public void validate( Task task )
      {
          if ( isReference() )
          {
              getRef().validate( task );
          }
          else
          {
              if ( groupId == null && artifactId == null && classifier == null && extension == null )
              {
                  throw new BuildException( "You must specify at least one of "
                      + "'groupId', 'artifactId', 'classifier' or 'extension'" );
              }
          }
      }
  
      public void setRefid( Reference ref )
      {
          if ( groupId != null || artifactId != null || extension != null || classifier != null )
          {
              throw tooManyAttributes();
          }
          super.setRefid( ref );
      }
  
      public String getGroupId()
      {
          if ( isReference() )
          {
              return getRef().getGroupId();
          }
          return ( groupId != null ) ? groupId : WILDCARD;
      }
  
      public void setGroupId( String groupId )
      {
          checkAttributesAllowed();
          if ( this.groupId != null )
          {
              throw ambiguousCoords();
          }
          this.groupId = groupId;
      }
  
      public String getArtifactId()
      {
          if ( isReference() )
          {
              return getRef().getArtifactId();
         }
         return ( artifactId != null ) ? artifactId : WILDCARD;
     }
 
     public void setArtifactId( String artifactId )
     {
         checkAttributesAllowed();
         if ( this.artifactId != null )
         {
             throw ambiguousCoords();
         }
         this.artifactId = artifactId;
     }
 
     public String getClassifier()
     {
         if ( isReference() )
         {
             return getRef().getClassifier();
         }
         return ( classifier != null ) ? classifier : WILDCARD;
     }
 
     public void setClassifier( String classifier )
     {
         checkAttributesAllowed();
         if ( this.classifier != null )
         {
             throw ambiguousCoords();
         }
         this.classifier = classifier;
     }
 
     public String getExtension()
     {
         if ( isReference() )
         {
             return getRef().getExtension();
         }
         return ( extension != null ) ? extension : WILDCARD;
     }
 
     public void setExtension( String extension )
     {
         checkAttributesAllowed();
         if ( this.extension != null )
         {
             throw ambiguousCoords();
         }
         this.extension = extension;
     }
 
     public void setCoords( String coords )
     {
         checkAttributesAllowed();
         if ( groupId != null || artifactId != null || extension != null || classifier != null )
         {
             throw ambiguousCoords();
         }
         Pattern p = Pattern.compile( "([^: ]+)(:([^: ]+)(:([^: ]+)(:([^: ]*))?)?)?" );
         Matcher m = p.matcher( coords );
         if ( !m.matches() )
         {
             throw new BuildException( "Bad exclusion coordinates '" + coords
                 + "', expected format is <groupId>[:<artifactId>[:<extension>[:<classifier>]]]" );
         }
         groupId = m.group( 1 );
         artifactId = m.group( 3 );
         if ( artifactId == null )
         {
             artifactId = "*";
         }
         extension = m.group( 5 );
         if ( extension == null )
         {
             extension = "*";
         }
         classifier = m.group( 7 );
         if ( classifier == null )
         {
             classifier = "*";
         }
     }
 
     private BuildException ambiguousCoords()
     {
         return new BuildException( "You must not specify both 'coords' and "
             + "('groupId', 'artifactId', 'extension', 'classifier')" );
     }
 
 }