001// Copyright 2007, 2008 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 org.apache.tapestry5.FieldValidator;
018import org.apache.tapestry5.MarkupWriter;
019import org.apache.tapestry5.ValidationException;
020
021import java.util.List;
022
023/**
024 * Aggregates together a number of field validator instances as a single unit.
025 */
026public final class CompositeFieldValidator implements FieldValidator
027{
028    private final FieldValidator[] validators;
029
030    public CompositeFieldValidator(List<FieldValidator> validators)
031    {
032        this.validators = validators.toArray(new FieldValidator[validators.size()]);
033    }
034
035    @SuppressWarnings("unchecked")
036    public void validate(Object value) throws ValidationException
037    {
038        for (FieldValidator fv : validators)
039            fv.validate(value);
040    }
041
042    public void render(MarkupWriter writer)
043    {
044        for (FieldValidator fv : validators)
045            fv.render(writer);
046    }
047
048    public boolean isRequired()
049    {
050        for (FieldValidator fv : validators)
051        {
052            if (fv.isRequired()) return true;
053        }
054
055        return false;
056    }
057
058}