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.binding.AbstractBinding;
020    import org.apache.tapestry.coerce.ValueConverter;
021    
022    /**
023     * Implementation of {@link IBinding} that provides
024     * {@link org.apache.tapestry.valid.IValidator}  instances based on a
025     * validator bean descriptor. The descriptor is of the form "type[,properties]".
026     * The types are values such as "string", "date" or "number" defined in the
027     * tapestry.valid.Validators configuration point. The properties are a
028     * properties initialization string.
029     * 
030     * @author Howard M. Lewis Ship
031     * @since 4.0
032     * @see org.apache.hivemind.util.PropertyUtils#configureProperties(java.lang.Object,
033     *      java.lang.String)
034     */
035    public class ValidatorBinding extends AbstractBinding
036    {
037    
038        private final IValidator _validator;
039    
040        public ValidatorBinding(String description, ValueConverter valueConverter,
041                Location location, IValidator validator)
042        {
043            super(description, valueConverter, location);
044    
045            Defense.notNull(validator, "validator");
046    
047            _validator = validator;
048        }
049    
050        public Object getObject()
051        {
052            return _validator;
053        }
054    
055    }