spring StringValueResolver 源码
spring StringValueResolver 代码
文件路径：/spring-core/src/main/java/org/springframework/util/StringValueResolver.java
/*
* Copyright 2002-2017 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.util;
import org.springframework.lang.Nullable;
/**
* Simple strategy interface for resolving a String value.
* Used by {@link org.springframework.beans.factory.config.ConfigurableBeanFactory}.
*
* @author Juergen Hoeller
* @since 2.5
* @see org.springframework.beans.factory.config.ConfigurableBeanFactory#resolveAliases
* @see org.springframework.beans.factory.config.BeanDefinitionVisitor#BeanDefinitionVisitor(StringValueResolver)
* @see org.springframework.beans.factory.config.PropertyPlaceholderConfigurer
*/
@FunctionalInterface
public interface StringValueResolver {
/**
* Resolve the given String value, for example parsing placeholders.
* @param strVal the original String value (never {@code null})
* @return the resolved String value (may be {@code null} when resolved to a null
* value), possibly the original String value itself (in case of no placeholders
* to resolve or when ignoring unresolvable placeholders)
* @throws IllegalArgumentException in case of an unresolvable String value
*/
@Nullable
String resolveStringValue(String strVal);
}
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