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.services;
016    
017    import org.apache.tapestry5.ComponentResources;
018    import org.apache.tapestry5.internal.InternalComponentResources;
019    import org.apache.tapestry5.model.ComponentModel;
020    import org.apache.tapestry5.plastic.ClassInstantiator;
021    import org.apache.tapestry5.plastic.InstanceContext;
022    import org.apache.tapestry5.runtime.Component;
023    
024    /**
025     * An object that can instantiate a component. This is now largely a wrapper around {@link ClassInstantiator}.
026     */
027    public interface Instantiator
028    {
029        /**
030         * Instantiates and returns a new instance of the desired class. Component classes are always modified so that they
031         * implement {@link Component} (and often, other interfaces as well). The resources are made available
032         * in the {@link InstanceContext} as both {@link ComponentResources} and {@link InternalComponentResources}.
033         */
034        Component newInstance(InternalComponentResources resources);
035    
036        /**
037         * Returns the model that defines the behavior of the component.
038         */
039        ComponentModel getModel();
040    }