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.ApplicationRuntimeException;
018import org.apache.hivemind.Location;
019import org.apache.hivemind.lib.BeanFactory;
020import org.apache.tapestry.IBinding;
021import org.apache.tapestry.IComponent;
022import org.apache.tapestry.binding.AbstractBindingFactory;
023
024/**
025 * Uses the tapestry.valid.ValidatorBeanFactory service to obtain configuration IValidator
026 * instances.
027 * 
028 * @author Howard M. Lewis Ship
029 * @since 4.0
030 * @see org.apache.tapestry.valid.ValidatorBinding
031 */
032public class ValidatorBindingFactory extends AbstractBindingFactory
033{
034    private BeanFactory _validatorBeanFactory;
035
036    public void setValidatorBeanFactory(BeanFactory validatorBeanFactory)
037    {
038        _validatorBeanFactory = validatorBeanFactory;
039    }
040
041    /**
042     * Creates and returns a {@link ValidatorBinding}. Interprets the path as a bean initializer,
043     * used to locate a particular type of validator and a particular configuration of its
044     * properties.
045     */
046
047    public IBinding createBinding(IComponent root, String bindingDescription, String expression,
048            Location location)
049    {
050        try
051        {
052            IValidator validator = (IValidator) _validatorBeanFactory.get(expression);
053
054            return new ValidatorBinding(bindingDescription, getValueConverter(), location,
055                    validator);
056        }
057        catch (Exception ex)
058        {
059            throw new ApplicationRuntimeException(ex.getMessage(), location, ex);
060        }
061    }
062}