package org.jscsi.target.connection;

 import org.jscsi.target.settings.TextKeyword;

 /**

  * The {@link SessionType} of a {@link TargetSession} determines which stages can be reached in the Full Feature Phase.

  * 

  * @author Andreas Ergenzinger

  */

 public enum SessionType {

     /**

      * The session is a discovery session. The initiator is only allowed to issue request a list of available target and

      * close the connection.

      */

     DISCOVERY(TextKeyword.DISCOVERY),

     /**

      * The session is a normal session. The initiator is allowed to issue all supported commands.

      */

     NORMAL(TextKeyword.NORMAL);

     /**

      * The session type as a text parameter negotiation <i>value</i> (as used in <i>key-value</> pairs).

      */

     private final String value;

     /**

      * The constructor.

      * 

      * @param value the text parameter negotiation <i>value</i> (as used in <i>key-value</> pairs) describing this

      *            session type.

      */

     private SessionType (final String value) {

         this.value = value;

     }

     public final String getValue () {

         return value;

     }

     /**

      * Returns a {@link SessionType} based on the <i>value</i>, which must be either <code>Discovery</code> or

      * <code>Normal</code>. Otherwise the method will return <code>null</code>.

      * 

      * @param value <code>Discovery</code> or <code>Normal</code>

      * @return the specified {@link SessionType} or <code>null</code>

      */

     public static final SessionType getSessionType (final String value) {

         final SessionType[] values = values();

         for (SessionType s : values)

             if (s.value.equals(value)) return s;

         return null;

     }

 }