    001    // Copyright 2010, 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.services;
    016
    017    import org.apache.tapestry5.ComponentResources;
    018
    019    /**
    020     * An object used to provide a value of a specific type to a component (represented by an
    021     * instance of {@link ComponentResources}). The provider will create and return the value
    022     * (some providers may be smart enough to cache a value, but should be implemented in
    023     * a thread-safe manner). Often the provider is an inner class of a {@link ComponentClassTransformWorker}.
    024     *
    025     * @param <T>
    026     *            type of object provided
    027     * @since 5.2.0
    028     * @deprecated Deprecated in 5.3, using Plastic equivalents
    029     * @see org.apache.tapestry5.plastic.PlasticField
    030     * @see org.apache.tapestry5.plastic.ComputedValue
    031     */
    032    @SuppressWarnings("deprecation")
    033    public interface ComponentValueProvider<T>
    034    {
    035        /**
    036         * Provide the object for the indicated component.
    037         *
    038         * @param resources
    039         *            Identifies the component
    040         * @return the object
    041         */
    042        T get(ComponentResources resources);
    043    }