spring BindMarkers 源码
spring BindMarkers 代码
文件路径：/spring-r2dbc/src/main/java/org/springframework/r2dbc/core/binding/BindMarkers.java
/*
* Copyright 2002-2020 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.binding;
/**
* Bind markers represent placeholders in SQL queries for substitution
* for an actual parameter. Using bind markers allows creating safe queries
* so query strings are not required to contain escaped values but rather
* the driver encodes parameter in the appropriate representation.
*
* <p>{@link BindMarkers} is stateful and can be only used for a single binding
* pass of one or more parameters. It maintains bind indexes/bind parameter names.
*
* @author Mark Paluch
* @since 5.3
* @see BindMarker
* @see BindMarkersFactory
* @see io.r2dbc.spi.Statement#bind
*/
@FunctionalInterface
public interface BindMarkers {
/**
* Create a new {@link BindMarker}.
*/
BindMarker next();
/**
* Create a new {@link BindMarker} that accepts a {@code hint}.
* Implementations are allowed to consider/ignore/filter
* the name hint to create more expressive bind markers.
* @param hint an optional name hint that can be used as part of the bind marker
* @return a new {@link BindMarker}
*/
default BindMarker next(String hint) {
return next();
}
}
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