    001    // Copyright 2007, 2010 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.tapestry5.internal.services;
    016
    017    import java.util.List;
    018
    019    import org.apache.tapestry5.ioc.AnnotationProvider;
    020    import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
    021    import org.apache.tapestry5.services.ValidationConstraintGenerator;
    022
    023    @SuppressWarnings("all")
    024    public class ValidationConstraintGeneratorImpl implements ValidationConstraintGenerator
    025    {
    026        private final List<ValidationConstraintGenerator> configuration;
    027
    028        public ValidationConstraintGeneratorImpl(final List<ValidationConstraintGenerator> configuration)
    029        {
    030            this.configuration = configuration;
    031        }
    032
    033        public List<String> buildConstraints(Class propertyType, AnnotationProvider annotationProvider)
    034        {
    035            assert propertyType != null;
    036            assert annotationProvider != null;
    037            List<String> result = CollectionFactory.newList();
    038
    039            for (ValidationConstraintGenerator g : configuration)
    040            {
    041                List<String> constraints = g.buildConstraints(propertyType, annotationProvider);
    042
    043                if (constraints != null)
    044                    result.addAll(constraints);
    045            }
    046
    047            // TODO: How to handle duplicate or conflicting constraints from different generators?
    048
    049            return result;
    050        }
    051    }