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
015package org.apache.tapestry.valid;
016
017import org.apache.hivemind.Location;
018import org.apache.hivemind.util.Defense;
019import org.apache.tapestry.binding.AbstractBinding;
020import org.apache.tapestry.coerce.ValueConverter;
021
022/**
023 * Implementation of {@link IBinding} that provides {@link org.apache.tapestry.valid.IValidator}
024 *  instances based on a validator bean descriptor. The descriptor is of the form
025 * "type[,properties]". The types are values such as "string", "date" or "number" defined in the
026 * tapestry.valid.Validators configuration point. The properties are a properties initialization
027 * string.
028 * 
029 * @author Howard M. Lewis Ship
030 * @since 4.0
031 * @see org.apache.hivemind.util.PropertyUtils#configureProperties(java.lang.Object,
032 *      java.lang.String)
033 */
034public class ValidatorBinding extends AbstractBinding
035{
036    private final IValidator _validator;
037
038    public ValidatorBinding(String description, ValueConverter valueConverter, Location location,
039            IValidator validator)
040    {
041        super(description, valueConverter, location);
042
043        Defense.notNull(validator, "validator");
044
045        _validator = validator;
046    }
047
048    public Object getObject()
049    {
050        return _validator;
051    }
052
053}