    001// Copyright 2006, 2011 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.transform;
    016
    017import org.apache.tapestry5.annotations.Retain;
    018import org.apache.tapestry5.model.MutableComponentModel;
    019import org.apache.tapestry5.plastic.PlasticClass;
    020import org.apache.tapestry5.plastic.PlasticField;
    021import org.apache.tapestry5.services.transform.ComponentClassTransformWorker2;
    022import org.apache.tapestry5.services.transform.TransformationSupport;
    023
    024/**
    025 * Identifies fields with the {@link org.apache.tapestry5.annotations.Retain} annotation, and "claims" them so that no
    026 * special work will occur on them. Retain has been deprecated in Tapestry 5.2 and will likely be removed in the future.
    027 */
    028public final class RetainWorker implements ComponentClassTransformWorker2
    029{
    030    /**
    031     * Claims each field with the {@link org.apache.tapestry5.annotations.Retain}  , claiming it using the
    032     * annotation class (not the annotation instance, to avoid
    033     * instantiating the annotation) as the tag.
    034     */
    035    public void transform(PlasticClass plasticClass, TransformationSupport support, MutableComponentModel model)
    036    {
    037        for (PlasticField field : plasticClass.getFieldsWithAnnotation(Retain.class))
    038        {
    039            field.claim(Retain.class);
    040        }
    041    }
    042}