001package 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.
002
003import org.apache.wicket.request.cycle.RequestCycle;
004import org.apache.wicket.markup.html.form.FormComponent;
005import org.apache.wicket.validation.*;
006import votorola.g.locale.BundleFormatter;
007import votorola.g.lang.*;
008
009
010/** A validator that limits character sequences to a maximum length.  For use only with
011  * models that hold character sequences.  (Otherwise, the associated IConverter should
012  * eagerly enforce its own constraints, at conversion time.)
013  */
014public @ThreadRestricted("wicket") final class MaxLengthValidator implements IValidator<CharSequence>
015{
016
017
018    /** Constructs a MaxLengthValidator.
019      *
020      *     @see #maxLength()
021      */
022    public MaxLengthValidator( int _maxLength ) { maxLength = _maxLength; }
023
024
025
026   // ------------------------------------------------------------------------------------
027
028
029    /** The maximum length.
030      */
031    public int maxLength() { return maxLength; }
032
033
034        private final int maxLength;
035
036
037
038   // - I - V a l i d a t o r ------------------------------------------------------------
039
040
041    /** @throws ClassCastException if the value is not a CharSequence
042      */
043    public void validate( final IValidatable<CharSequence> v ) throws ClassCastException
044    {
045        final CharSequence value = v.getValue(); // not null, inless INullAcceptingValidator
046        final int length = value.length();
047        if( length > maxLength )
048        {
049            v.error( new ValidationError1( ((BundleFormatter.GProvider)RequestCycle.get()).bunG().l(
050              "g.inputTooLong", value.subSequence(0,16) + "...", length, maxLength )));
051        }
052    }
053
054
055
056}