package org.apache.maven.plugins.ear;
   
   /*
    * 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.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.xml.XMLWriter;
  
  /**
   * Representation of {@code resource-ref} element in {@code application.xml} file.
   * 
   * <pre>
   * &lt;resource-ref&gt;
   *   &lt;res-ref-name&gt;jdbc/myDs&lt;/res-ref-name&gt;
   *   &lt;res-type&gt;javax.sql.DataSource&lt;/res-type&gt;
   *   &lt;res-auth&gt;Container&lt;/res-auth&gt;
   * &lt;/resource-ref&gt;
   * </pre>
   * or
   * <pre>
   * &lt;resource-ref&gt;
   *   &lt;res-ref-name&gt;jdbc/myDs&lt;/res-ref-name&gt;
   *   &lt;res-type&gt;javax.sql.DataSource&lt;/res-type&gt;
   *   &lt;lookup-name&gt;jdbc/lookup/myDs&lt;/lookup-name&gt;
   * &lt;/resource-ref&gt;
   * </pre>
   * 
   * @author Karl Heinz Marbaise
   * @since 3.0.0
   */
  public class ResourceRef
  {
      static final String RESOURCE_REF = "resource-ref";
  
      static final String RESOURCE_REF_NAME = "res-ref-name";
  
      static final String RESOURCE_TYPE = "res-type";
  
      static final String RESOURCE_AUTH = "res-auth";
  
     static final String LOOKUP_NAME = "lookup-name";
  
      private String name;
  
      private String type;
  
      private String auth;
  
     private String lookupName;
  
      /**
       * @param name The res-ref-name.
       * @param type The res-type
       * @param auth The res-auth.
       * @param lookupName The lookup-name.
       */
     public ResourceRef( String name, String type, String auth, String lookupName )
      {
          if ( StringUtils.isEmpty( name ) )
          {
              throw new IllegalArgumentException( RESOURCE_REF_NAME + " in " + RESOURCE_REF_NAME
                  + " element cannot be null." );
          }
          else if ( StringUtils.isEmpty( type ) && StringUtils.isEmpty( auth ) )
          {
              throw new IllegalArgumentException( RESOURCE_TYPE + " in " + RESOURCE_REF_NAME
                  + " element cannot be null " );
          }
  
          this.name = name;
          this.type = type;
          this.auth = auth;
          this.lookupName = lookupName;
  
      }
  
      /**
       * Appends the {@code XML} representation of this env-entry.
       * 
       * @param writer the writer to use
       */
      public void appendResourceRefEntry( XMLWriter writer )
      {
         writer.startElement( RESOURCE_REF );
 
         // res-name
         doWriteElement( writer, RESOURCE_REF_NAME, getName() );
 
         // res_ref-type
         if ( getType() != null )
         {
             doWriteElement( writer, RESOURCE_TYPE, getType() );
         }
 
         // ref-auth
         if ( getAuth() != null )
         {
             doWriteElement( writer, RESOURCE_AUTH, getAuth() );
         }
 
         // lookup-name
         if ( getLookupName() != null ) 
         {
             doWriteElement( writer, LOOKUP_NAME, getLookupName() );
         }
 
         // end of ejb-ref
         writer.endElement();
     }
 
     private void doWriteElement( XMLWriter writer, String element, String text )
     {
         writer.startElement( element );
         writer.writeText( text );
         writer.endElement();
     }
 
     /**
      * @return {@link #name}
      */
     public String getName()
     {
         return name;
     }
 
     /**
      * @param name {@link #name}
      */
     public void setName( String name )
     {
         this.name = name;
     }
 
     /**
      * @return {@link #type}
      */
     public String getType()
     {
         return type;
     }
 
     /**
      * @param type {@link #type}
      */
     public void setType( String type )
     {
         this.type = type;
     }
 
     /**
      * @return {@link #auth}
      */
     public String getAuth()
     {
         return auth;
     }
 
     /**
      * @param auth {@link #auth}
      */
     public void setAuth( String auth )
     {
         this.auth = auth;
     }
     
     /**
      * @return {@link #lookupName}
      */
     public String getLookupName() 
     {
         return lookupName;
     }
 
    /**
     * @param lookupName {@link #lookupName}
     */
     public void setLookupName( String lookupName ) 
     {
         this.lookupName = lookupName;
     }
 
 }