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.ApplicationRuntimeException;
018    import org.apache.hivemind.Location;
019    import org.apache.hivemind.lib.BeanFactory;
020    import org.apache.tapestry.IBinding;
021    import org.apache.tapestry.IComponent;
022    import 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     */
032    public 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    }