    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
    015    package org.apache.tapestry5.internal.transform;
    016
    017    import org.apache.tapestry5.annotations.Retain;
    018    import org.apache.tapestry5.model.MutableComponentModel;
    019    import org.apache.tapestry5.plastic.PlasticClass;
    020    import org.apache.tapestry5.plastic.PlasticField;
    021    import org.apache.tapestry5.services.transform.ComponentClassTransformWorker2;
    022    import 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     */
    028    public 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    }