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19  
20  package org.apache.jsieve.commands;
21  
22  import org.apache.jsieve.Arguments;
23  import org.apache.jsieve.Block;
24  import org.apache.jsieve.SieveContext;
25  import org.apache.jsieve.exception.SieveException;
26  import org.apache.jsieve.mail.MailAdapter;
27  
28  /**
29   * Class Else implements the Else Command as defined in RFC 3028, section 3.1.
30   */
31  public class Else extends AbstractConditionalCommand {
32  
33      /**
34       * Constructor for Else.
35       */
36      public Else() {
37          super();
38      }
39  
40      /**
41       * <p>
42       * Conditionally eexecute a Block if an Else Condition is runnable.
43       * </p>
44       * <p>
45       * Also,
46       * 
47       * @see org.apache.jsieve.commands.AbstractCommand#executeBasic(MailAdapter,
48       *      Arguments, Block, SieveContext)
49       *      </p>
50       */
51      protected Object executeBasic(MailAdapter mail, Arguments arguments,
52              Block block, SieveContext context) throws SieveException {
53          // Check Syntax
54          if (!context.getConditionManager().isElseAllowed())
55              throw context.getCoordinate().commandException(
56                      "Unexpected Command: \"else\".");
57  
58          // Check Runnable
59          if (!context.getConditionManager().isElseRunnable())
60              return Boolean.FALSE;
61  
62          // Execute the Block
63          execute(mail, block, context);
64  
65          // Update the ConditionManager
66          // 'Else' is always true
67          context.getConditionManager().setElseTestResult(true);
68  
69          // Return the result
70          return Boolean.TRUE;
71      }
72  
73  }