framework/src/net/sf/tapestry/valid/ValidationConstraint.java

/*
 *  ====================================================================
 *  The Apache Software License, Version 1.1
 *
 *  Copyright (c) 2002 The Apache Software Foundation.  All rights
 *  reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in
 *  the documentation and/or other materials provided with the
 *  distribution.
 *
 *  3. The end-user documentation included with the redistribution,
 *  if any, must include the following acknowledgment:
 *  "This product includes software developed by the
 *  Apache Software Foundation (http://www.apache.org/)."
 *  Alternately, this acknowledgment may appear in the software itself,
 *  if and wherever such third-party acknowledgments normally appear.
 *
 *  4. The names "Apache" and "Apache Software Foundation" and
 *  "Apache Tapestry" must not be used to endorse or promote products
 *  derived from this software without prior written permission. For
 *  written permission, please contact apache@apache.org.
 *
 *  5. Products derived from this software may not be called "Apache",
 *  "Apache Tapestry", nor may "Apache" appear in their name, without
 *  prior written permission of the Apache Software Foundation.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 *  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 *  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *  ====================================================================
 *
 *  This software consists of voluntary contributions made by many
 *  individuals on behalf of the Apache Software Foundation.  For more
 *  information on the Apache Software Foundation, please see
 *  <http://www.apache.org/>.
 */
package net.sf.tapestry.valid;

import org.apache.commons.lang.enum.Enum;

/**
 *  Defines an enumeration of different types of validation constraints
 *  that may be violated.
 *
 *  @author Howard Lewis Ship
 *  @version $Id$
 * 
 **/

public class ValidationConstraint extends Enum
{
    /**
     *  Indicates that no value (or a value consisting only of white space) was
     *  provided for a field that requires a non-null value.
     *
     **/

    public static final ValidationConstraint REQUIRED =
        new ValidationConstraint("REQUIRED");

    /**
     *  Indicates that a non-null value was provided, but that (after removing
     *  leading and trailing whitespace), the value was not long enough.
     *
     **/

    public static final ValidationConstraint MINIMUM_WIDTH =
        new ValidationConstraint("MINUMUM_WIDTH");

    /**
     *  Indicates a general error in converting a String into a Date.
     *
     **/

    public static final ValidationConstraint DATE_FORMAT =
        new ValidationConstraint("DATE_FORMAT");

    /**
     *  Indicates a general error in the format of a string that is
     *  to be interpreted as a email.
     *
     **/

    public static final ValidationConstraint EMAIL_FORMAT =
        new ValidationConstraint("EMAIL_FORMAT");

    /**
     *  Indicates a general error in the format of a string that is
     *  to be interpreted as a number.
     *
     **/

    public static final ValidationConstraint NUMBER_FORMAT =
        new ValidationConstraint("NUMBER_FORMAT");

    /**
     *  Indicates that the value was too small (for a Date, too early).
     *
     **/

    public static final ValidationConstraint TOO_SMALL =
        new ValidationConstraint("TOO_SMALL");

    /**
     *  Indicates that the value was too large (for a Date, too late).
     *
     **/

    public static final ValidationConstraint TOO_LARGE =
        new ValidationConstraint("TOO_LARGE");

    /**
     *  Protected constructor, which allows new constraints to be created
     *  as subclasses.
     * 
     **/

    protected ValidationConstraint(String name)
    {
        super(name);
    }

}