trunk/main/src/main/java/org/apache/jsieve/commands/Elsif.java

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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.TestList;
import org.apache.jsieve.exception.SieveException;
import org.apache.jsieve.mail.MailAdapter;

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

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

    /**
     * <p>
     * Conditionally eexecute a Block if an Elsif Condition is allowed and
     * 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().isElsifAllowed())
            throw context.getCoordinate().commandException(
                    "Unexpected Command: \"elsif\".");

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

        // Run the tests
        Boolean isTestPassed = (Boolean) arguments.getTestList().execute(mail,
                context);

        // If the tests answered TRUE, execute the Block
        if (isTestPassed.booleanValue())
            execute(mail, block, context);

        // Update the ConditionManager
        context.getConditionManager().setElsifTestResult(
                isTestPassed.booleanValue());

        // Return the result
        return isTestPassed;
    }

    /**
     * @see org.apache.jsieve.commands.AbstractCommand#validateArguments(Arguments,
     *      SieveContext)
     */
    protected void validateArguments(Arguments arguments, SieveContext context)
            throws SieveException {
        TestList testList = arguments.getTestList();
        if (null == testList || testList.getTests().isEmpty())
            throw context.getCoordinate().syntaxException("Expecting a Test");
    }

}