spring BindParameterSource 源码
spring BindParameterSource 代码
文件路径：/spring-r2dbc/src/main/java/org/springframework/r2dbc/core/BindParameterSource.java
/*
* Copyright 2002-2022 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.r2dbc.core;
import io.r2dbc.spi.Parameter;
/**
* Interface that defines common functionality for objects
* that can offer parameter values for named bind parameters,
* serving as argument for {@link NamedParameterExpander} operations.
*
* <p>This interface allows for the specification of the type in
* addition to parameter values. All parameter values and types are
* identified by specifying the name of the parameter.
*
* <p>Intended to wrap various implementations like a {@link java.util.Map}
* with a consistent interface.
*
* @author Mark Paluch
* @since 5.3
* @see MapBindParameterSource
*/
interface BindParameterSource {
/**
* Determine whether there is a value for the specified named parameter.
* @param paramName the name of the parameter
* @return {@code true} if there is a value defined; {@code false} otherwise
*/
boolean hasValue(String paramName);
/**
* Return the parameter for the requested named parameter.
* @param paramName the name of the parameter
* @return the specified parameter
* @throws IllegalArgumentException if there is no value
* for the requested parameter
*/
Parameter getValue(String paramName) throws IllegalArgumentException;
/**
* Return the parameter names of the underlying parameter source.
* @return an iterator over the parameter names
*/
Iterable<String> getParameterNames();
}
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