001/*
002 * Copyright 2002-2016 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.expression;
018
019import java.util.List;
020
021import org.springframework.core.convert.TypeDescriptor;
022import org.springframework.lang.Nullable;
023
024/**
025 * A constructor resolver attempts locate a constructor and returns a ConstructorExecutor
026 * that can be used to invoke that constructor. The ConstructorExecutor will be cached but
027 * if it 'goes stale' the resolvers will be called again.
028 *
029 * @author Andy Clement
030 * @since 3.0
031 */
032@FunctionalInterface
033public interface ConstructorResolver {
034
035        /**
036         * Within the supplied context determine a suitable constructor on the supplied type
037         * that can handle the specified arguments. Return a ConstructorExecutor that can be
038         * used to invoke that constructor (or {@code null} if no constructor could be found).
039         * @param context the current evaluation context
040         * @param typeName the type upon which to look for the constructor
041         * @param argumentTypes the arguments that the constructor must be able to handle
042         * @return a ConstructorExecutor that can invoke the constructor, or null if non found
043         */
044        @Nullable
045        ConstructorExecutor resolve(EvaluationContext context, String typeName, List<TypeDescriptor> argumentTypes)
046                        throws AccessException;
047
048}