    001    //  Copyright 2008,, 2009 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.ioc.internal;
    016
    017    import org.apache.tapestry5.ioc.Invokable;
    018    import org.apache.tapestry5.ioc.ObjectCreator;
    019    import org.apache.tapestry5.ioc.OperationTracker;
    020
    021    /**
    022     * Makes sure the operations tracker is notified knows that a service is being realized.
    023     */
    024    public class OperationTrackingObjectCreator implements ObjectCreator
    025    {
    026        private final OperationTracker tracker;
    027
    028        private final String message;
    029
    030        private final ObjectCreator delegate;
    031
    032        public OperationTrackingObjectCreator(OperationTracker tracker, String message, ObjectCreator delegate)
    033        {
    034            this.tracker = tracker;
    035            this.message = message;
    036            this.delegate = delegate;
    037        }
    038
    039        public Object createObject()
    040        {
    041            Invokable<Object> operation = new Invokable<Object>()
    042            {
    043                public Object invoke()
    044                {
    045                    return delegate.createObject();
    046                }
    047            };
    048
    049            return tracker.invoke(message, operation);
    050        }
    051    }