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    import java.lang.reflect.Method;
018    
019    /**
020     * Similiar to {@link Method}, this allows a method of a Plastic class to be invoked regardless of visibility. Plastic
021     * ensures that reflection is not necessary.
022     */
023    public interface MethodHandle
024    {
025        /**
026         * Invokes the method for this handle on the instance.
027         * 
028         * @param instance
029         *            the instance containing the method to invoke
030         * @param arguments
031         *            the arguments, if any, to pass to the method. Wrapper types will be unwrapped as necessary
032         *            to perform the invocation.
033         * @return result object encapsulating the actual return value or the checked exception thrown by the method
034         * @throws ClassCastException
035         *             if instance is not the correct type for this method.
036         * @throws RuntimeException
037         *             if the actual method throws a runtime exception
038         */
039        MethodInvocationResult invoke(Object instance, Object... arguments);
040    }