/*
 * IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
 * 
 * http://izpack.org/
 * http://izpack.codehaus.org/
 * 
 * Copyright 2003 Elmar Grom
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 *     
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.izforge.izpack.sample;

import com.izforge.izpack.panels.ProcessingClient;
import com.izforge.izpack.panels.Validator;

/*---------------------------------------------------------------------------*/
/**
 * This class represents a simple validator for IP addresses to demonstrate
 * the implementation of a rule validator that cooperates with the
 * <code>RuleInputField</code> used in the <code>UserInputPanel</code>
 *
 * @author Elmar Grom
 * @version 0.0.1 / 02/19/03
 */
/*---------------------------------------------------------------------------*/
public class IPValidator implements Validator
{
    /*--------------------------------------------------------------------------*/
    /**
     * Validates the contend of a <code>RuleInputField</code>. The test is
     * intended for a rule input field composed of four sub-fields. The
     * combination of their individual content is assumed to represent an IP
     * address.
     *
     * @param client the client object using the services of this validator.
     * @return <code>true</code> if the validation passes, otherwise <code>false</code>.
     */
    /*--------------------------------------------------------------------------*/
    public boolean validate(ProcessingClient client)
    {
        // ----------------------------------------------------
        // verify that there are actually four sub-fields. A
        // different number would indicate that we are not
        // connected with the RuleInputField that we expect
        // ----------------------------------------------------
        if (client.getNumFields() != 4)
        {
            return (false);
        }

        // ----------------------------------------------------
        // test each field to make sure it actually contains
        // an integer and the value of the integer is beween
        // 0 and 255.
        // ----------------------------------------------------
        boolean isIP = true;

        for (int i = 0; i < 4; i++)
        {
            int value;

            try
            {
                value = Integer.parseInt(client.getFieldContents(i));
                if ((value < 0) || (value > 255))
                {
                    isIP = false;
                }
            }
            catch (Throwable exception)
            {
                isIP = false;
            }
        }

        return (isIP);
    }
}
/*---------------------------------------------------------------------------*/
