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/*
 * Enhydra Java Application Server Project
 * 
 * The contents of this file are subject to the Enhydra Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License on
 * the Enhydra web site ( http://www.enhydra.org/ ).
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 
 * the License for the specific terms governing rights and limitations
 * under the License.
 * 
 * The Initial Developer of the Enhydra Application Server is Lutris
 * Technologies, Inc. The Enhydra Application Server and portions created
 * by Lutris Technologies, Inc. are Copyright Lutris Technologies, Inc.
 * All Rights Reserved.
 * 
 * Contributor(s):
 * 
 * $Id: BooleanOption.java,v 1.2 2005/01/26 08:29:24 jkjome Exp $
 */

package org.enhydra.xml.xmlc.commands.options;

import org.enhydra.xml.io.ErrorReporter;
import org.enhydra.xml.xmlc.XMLCException;

/**
 * An option that takes a boolean value of true/false/yes/no.
 */
public abstract class BooleanOption extends Option {
    /**
     * Construct a new object.
     *
     * @param name The name of the option.
     * @param help Help string for the option.
     */
    public BooleanOption(String name,
                         String help) {
        super(name, 1, false, help);
    }

    /**
     * Method called to set the value.
     */
    abstract protected void set(boolean value,
                                Object clientData) throws XMLCException;

    /**
     * Parse an instance of the option and set the field in the Options
     * object using Java reflection.
     *
     * @param args The option's arguments.
     */
    public void parse(String[] args,
                      ErrorReporter errorReporter,
                      Object clientData) throws XMLCException {
        String strValue = args[0];
        try {
            boolean value;
            if (strValue.equalsIgnoreCase("yes")) {
                value = true;
            } else if (strValue.equalsIgnoreCase("no")) {
                value = false;
            } else if (strValue.equalsIgnoreCase("true")) {
                value = true;
            } else if (strValue.equalsIgnoreCase("false")) {
                value = false;
            } else {
                throw new XMLCException("Illegal value for " + name
                                        + ", expected yes, no, true, or false");
            }
            set(value, clientData);
        } catch (Exception except) {
            throw new XMLCException(except);
        }
    }
}