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.test;
016
017import org.apache.hivemind.Location;
018import org.apache.tapestry.enhance.EnhanceUtils;
019import org.apache.tapestry.enhance.EnhancementOperation;
020import org.apache.tapestry.enhance.EnhancementWorker;
021import org.apache.tapestry.spec.IComponentSpecification;
022
023/**
024 * Forces the creation of a property, overrriding an existing implementation. Allows test code to
025 * set the specification and messages properties of components.
026 * 
027 * @author Howard M. Lewis Ship
028 * @since 4.0
029 */
030public class CreatePropertyWorker implements EnhancementWorker
031{
032    private final String _propertyName;
033
034    private final Location _location;
035
036    public CreatePropertyWorker(String propertyName, Location location)
037    {
038        _propertyName = propertyName;
039        _location = location;
040    }
041
042    public void performEnhancement(EnhancementOperation op, IComponentSpecification spec)
043    {
044        Class propertyType = EnhanceUtils.extractPropertyType(op, _propertyName, null);
045
046        op.claimProperty(_propertyName);
047
048        String field = "_$" + _propertyName;
049
050        op.addField(field, propertyType);
051
052        EnhanceUtils.createSimpleAccessor(op, field, _propertyName, propertyType, _location);
053
054        EnhanceUtils.createSimpleMutator(op, field, _propertyName, propertyType, _location);
055    }
056}