    001    // Copyright 2010 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.runtime.Component;
    018
    019    /**
    020     * An operation that requires an instance of a component.
    021     * This is a simpler alternative to a {@link ComponentMethodAdvice} that avoids
    022     * the most common error case: forgetting to invoke {@link ComponentMethodInvocation#proceed()} (which
    023     * can be very difficult to track down!).
    024     *
    025     * @since 5.2.0
    026     * @see TransformMethod#addOperationAfter(ComponentInstanceOperation)
    027     * @see TransformMethod#addOperationBefore(ComponentInstanceOperation)
    028     * @deprecated Deprecated in 5.3 with no replacement
    029     */
    030    public interface ComponentInstanceOperation
    031    {
    032        /** Called to perform the desired operation on a component instance. */
    033        public void invoke(Component instance);
    034    }