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;
  
  /**
   * The representation of a env-entry entry within an application.xml file.
   * 
   * @author Jim Brownfield based on code by <a href="snicoll@apache.org">Stephane Nicoll</a>
   */
  class EnvEntry
  {
  
      static final String ENV_ENTRY = "env-entry";
  
      static final String DESCRIPTION = "description";
  
      static final String ENV_ENTRY_NAME = "env-entry-name";
  
      static final String ENV_ENTRY_TYPE = "env-entry-type";
  
      static final String ENV_ENTRY_VALUE = "env-entry-value";
  
      static final String ENV_LOOKUP_NAME = "lookup-name";
  
      private final String description;
  
      private final String name;
  
      private final String type;
  
      private final String value;
  
      private final String lookupName;
  
      EnvEntry( String description, String name, String type, String value, String lookupName )
      {
          if ( StringUtils.isEmpty( name ) )
          {
              throw new IllegalArgumentException( ENV_ENTRY_NAME + " in " + ENV_ENTRY + " element cannot be null." );
          }
          else if ( StringUtils.isEmpty( type ) && StringUtils.isEmpty( value ) )
          {
              throw new IllegalArgumentException( ENV_ENTRY_TYPE + " in " + ENV_ENTRY + " element cannot be null if no "
                  + ENV_ENTRY_VALUE + " was specified." );
  
          }
  
          this.description = description;
          this.name = name;
          this.type = type;
          this.value = value;
          this.lookupName = lookupName;
      }
  
      public String getDescription()
      {
          return description;
      }
  
      public String getName()
      {
          return name;
      }
  
      public String getType()
      {
          return type;
      }
  
      public String getValue()
      {
          return value;
      }
  
      public String getLookupName()
      {
          return lookupName;
      }
  
     /**
      * Appends the {@code XML} representation of this env-entry.
      * 
      * @param writer the writer to use
      */
     public void appendEnvEntry( XMLWriter writer )
     {
         System.out.println( "appendEnvEntry()" );
         writer.startElement( ENV_ENTRY );
 
         // description
         if ( getDescription() != null )
         {
             doWriteElement( writer, DESCRIPTION, getDescription() );
         }
 
         // env entry name
         doWriteElement( writer, ENV_ENTRY_NAME, getName() );
 
         // env entry type
         if ( getType() != null )
         {
             doWriteElement( writer, ENV_ENTRY_TYPE, getType() );
         }
 
         // env entry value
         if ( getValue() != null )
         {
             doWriteElement( writer, ENV_ENTRY_VALUE, getValue() );
         }
 
         // lookup-name
         if ( getLookupName() != null )
         {
             doWriteElement( writer, ENV_LOOKUP_NAME, getLookupName() );
         }
 
         // end of env-entry
         writer.endElement();
     }
 
     private void doWriteElement( XMLWriter writer, String element, String text )
     {
         writer.startElement( element );
         writer.writeText( text );
         writer.endElement();
     }
 
     public String toString()
     {
         return "env-entry [name=" + getName() + ", type=" + getType() + ", value=" + getValue() + ", lookup-name="
             + getLookupName() + "]";
     }
 
 }