001    // Copyright 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.valid;
016    
017    import org.apache.hivemind.Location;
018    import org.apache.hivemind.util.Defense;
019    import org.apache.tapestry.IBinding;
020    import org.apache.tapestry.binding.AbstractBinding;
021    import org.apache.tapestry.coerce.ValueConverter;
022    
023    /**
024     * Implementation of {@link IBinding} that provides
025     * {@link org.apache.tapestry.valid.IValidator}  instances based on a
026     * validator bean descriptor. The descriptor is of the form "type[,properties]".
027     * The types are values such as "string", "date" or "number" defined in the
028     * tapestry.valid.Validators configuration point. The properties are a
029     * properties initialization string.
030     * 
031     * @author Howard M. Lewis Ship
032     * @since 4.0
033     * @see org.apache.hivemind.util.PropertyUtils#configureProperties(java.lang.Object,
034     *      java.lang.String)
035     */
036    public class ValidatorBinding extends AbstractBinding
037    {
038    
039        private final IValidator _validator;
040    
041        public ValidatorBinding(String description, ValueConverter valueConverter,
042                Location location, IValidator validator)
043        {
044            super(description, valueConverter, location);
045    
046            Defense.notNull(validator, "validator");
047    
048            _validator = validator;
049        }
050    
051        public Object getObject()
052        {
053            return _validator;
054        }
055    
056    }