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 * 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   *
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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
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package org.apache.jsieve.commands;

import org.apache.jsieve.Arguments;
import org.apache.jsieve.Block;
import org.apache.jsieve.SieveContext;
import org.apache.jsieve.exception.SieveException;
import org.apache.jsieve.mail.MailAdapter;

/**
 * Class Else implements the Else Command as defined in RFC 3028, section 3.1.
 */
public class Else extends AbstractConditionalCommand {

    /**
     * Constructor for Else.
     */
    public Else() {
        super();
    }

    /**
     * <p>
     * Conditionally eexecute a Block if an Else Condition is runnable.
     * </p>
     * <p>
     * Also,
     * 
     * @see org.apache.jsieve.commands.AbstractCommand#executeBasic(MailAdapter,
     *      Arguments, Block, SieveContext)
     *      </p>
     */
    protected Object executeBasic(MailAdapter mail, Arguments arguments,
            Block block, SieveContext context) throws SieveException {
        // Check Syntax
        if (!context.getConditionManager().isElseAllowed())
            throw context.getCoordinate().commandException(
                    "Unexpected Command: \"else\".");

        // Check Runnable
        if (!context.getConditionManager().isElseRunnable())
            return Boolean.FALSE;

        // Execute the Block
        execute(mail, block, context);

        // Update the ConditionManager
        // 'Else' is always true
        context.getConditionManager().setElseTestResult(true);

        // Return the result
        return Boolean.TRUE;
    }

}