001// Copyright 2005 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.tapestry.form.validator;
016
017import org.apache.tapestry.IMarkupWriter;
018import org.apache.tapestry.IRequestCycle;
019import org.apache.tapestry.form.FormComponentContributorContext;
020import org.apache.tapestry.form.IFormComponent;
021import org.apache.tapestry.form.ValidationMessages;
022import org.apache.tapestry.valid.ValidatorException;
023
024/**
025 * Abstract implementation of {@link org.apache.tapestry.form.validator.Validator} that delegates to
026 * some other object.
027 * 
028 * @author Howard Lewis Ship
029 * @since 4.0
030 */
031public abstract class AbstractValidatorWrapper implements Validator
032{
033    protected abstract Validator getDelegate();
034
035    public void validate(IFormComponent field, ValidationMessages messages, Object object)
036            throws ValidatorException
037    {
038        getDelegate().validate(field, messages, object);
039    }
040
041    public boolean getAcceptsNull()
042    {
043        return getDelegate().getAcceptsNull();
044    }
045
046    public boolean isRequired()
047    {
048        return getDelegate().isRequired();
049    }
050
051    public void renderContribution(IMarkupWriter writer, IRequestCycle cycle,
052            FormComponentContributorContext context, IFormComponent field)
053    {
054        getDelegate().renderContribution(writer, cycle, context, field);
055    }
056
057}