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Spring Expression Language (SpEL)

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/*
 * Copyright 2002-2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.expression;

import java.util.List;

import org.springframework.core.convert.TypeDescriptor;
import org.springframework.lang.Nullable;

/**
 * A constructor resolver attempts to locate a constructor and returns a
 * {@link ConstructorExecutor} that can be used to invoke that constructor.
 *
 * The {@code ConstructorExecutor} will be cached, but if it becomes stale the
 * resolvers will be called again.
 *
 * @author Andy Clement
 * @author Sam Brannen
 * @since 3.0
 * @see ConstructorExecutor
 * @see MethodResolver
 */
@FunctionalInterface
public interface ConstructorResolver {

	/**
	 * Within the supplied context, resolve a suitable constructor on the
	 * supplied type that can handle the specified arguments.
	 * Returns a {@link ConstructorExecutor} that can be used to invoke that
	 * constructor (or {@code null} if no constructor could be found).
	 * @param context the current evaluation context
	 * @param typeName the fully-qualified name of the type upon which to look
	 * for the constructor
	 * @param argumentTypes the types of arguments that the constructor must be
	 * able to handle
	 * @return a {@code ConstructorExecutor} that can invoke the constructor,
	 * or {@code null} if the constructor cannot be found
	 */
	@Nullable
	ConstructorExecutor resolve(EvaluationContext context, String typeName, List argumentTypes)
			throws AccessException;

}