001/* 002 * Copyright 2002-2013 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; 018 019/** 020 * Implementers of this interface are expected to be able to locate types. 021 * They may use a custom {@link ClassLoader} and/or deal with common 022 * package prefixes (e.g. {@code java.lang}) however they wish. 023 * 024 * <p>See {@link org.springframework.expression.spel.support.StandardTypeLocator} 025 * for an example implementation. 026 * 027 * @author Andy Clement 028 * @since 3.0 029 */ 030public interface TypeLocator { 031 032 /** 033 * Find a type by name. The name may or may not be fully qualified 034 * (e.g. {@code String} or {@code java.lang.String}). 035 * @param typeName the type to be located 036 * @return the {@code Class} object representing that type 037 * @throws EvaluationException if there is a problem finding the type 038 */ 039 Class<?> findType(String typeName) throws EvaluationException; 040 041}