package votorola.g.web.wic; // Copyright 2008-2009, Michael Allan.  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE.

import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.markup.html.form.FormComponent;
import org.apache.wicket.validation.*;
import votorola.g.locale.BundleFormatter;
import votorola.g.lang.*;


/** A validator that limits character sequences to a maximum length.  For use only with
  * models that hold character sequences.  (Otherwise, the associated IConverter should
  * eagerly enforce its own constraints, at conversion time.)
  */
public @ThreadRestricted("wicket") final class MaxLengthValidator implements IValidator<CharSequence>
{


    /** Constructs a MaxLengthValidator.
      *
      *     @see #maxLength()
      */
    public MaxLengthValidator( int _maxLength ) { maxLength = _maxLength; }



   // ------------------------------------------------------------------------------------


    /** The maximum length.
      */
    public int maxLength() { return maxLength; }


        private final int maxLength;



   // - I - V a l i d a t o r ------------------------------------------------------------


    /** @throws ClassCastException if the value is not a CharSequence
      */
    public void validate( final IValidatable<CharSequence> v ) throws ClassCastException
    {
        final CharSequence value = v.getValue(); // not null, inless INullAcceptingValidator
        final int length = value.length();
        if( length > maxLength )
        {
            v.error( new ValidationError1( ((BundleFormatter.GProvider)RequestCycle.get()).bunG().l(
              "g.inputTooLong", value.subSequence(0,16) + "...", length, maxLength )));
        }
    }



}