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}