001// Copyright 2007 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.beaneditor;
016
017import org.apache.tapestry5.ioc.AnnotationProvider;
018import org.apache.tapestry5.services.ValidationConstraintGenerator;
019
020import java.util.Arrays;
021import java.util.List;
022
023/**
024 * Adds a "required" constraint for any property of whose type is a primitive (not a wrapper or reference) type.
025 */
026public class PrimitiveFieldConstraintGenerator implements ValidationConstraintGenerator
027{
028    private final List<String> REQUIRED = Arrays.asList("required");
029
030    public List<String> buildConstraints(Class propertyType, AnnotationProvider annotationProvider)
031    {
032        return propertyType.isPrimitive() ? REQUIRED : null;
033    }
034
035}