001    // Copyright 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.plastic;
016    
017    /**
018     * A wrapper around a {@link PlasticClass} that allows the class to be converted into a concrete class, once all
019     * transformations are complete.
020     * 
021     * @param <T>
022     */
023    public interface PlasticClassTransformation<T>
024    {
025        /**
026         * Returns the PlasticClass being transformed.
027         * 
028         * @return PlasticClass instance
029         */
030        PlasticClass getPlasticClass();
031    
032        /**
033         * Terminates the class transformation process, finishes any final bookkeeping, and
034         * returns an object used to instantiate the transformed class. Once this method is invoked,
035         * no other methods of the {@link PlasticClass} (or related objects) can be invoked.
036         * <p>
037         * The returned ClassInstantiator has an empty {@link InstanceContext} map. Use
038         * {@link ClassInstantiator#with(Class, Object)} to create a new ClassInstantiator with new InstanceContext entries.
039         */
040        ClassInstantiator<T> createInstantiator();
041    }