    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
    015package org.apache.tapestry5.internal.services;
    016
    017import java.util.List;
    018
    019import org.apache.tapestry5.commons.AnnotationProvider;
    020import org.apache.tapestry5.commons.util.CollectionFactory;
    021import org.apache.tapestry5.services.ValidationConstraintGenerator;
    022
    023@SuppressWarnings("all")
    024public 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}