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}