spring MapBindParameterSource 源码
spring MapBindParameterSource 代码
文件路径：/spring-r2dbc/src/main/java/org/springframework/r2dbc/core/MapBindParameterSource.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 java.util.LinkedHashMap;
import java.util.Map;
import io.r2dbc.spi.Parameter;
import io.r2dbc.spi.Parameters;
import org.springframework.util.Assert;
/**
* {@link BindParameterSource} implementation that holds a given {@link Map} of parameters
* encapsulated as {@link Parameter}.
*
* <p>This class is intended for passing in a simple Map of parameter values to the methods
* of the {@code NamedParameterExpander} class.
*
* @author Mark Paluch
* @since 5.3
*/
class MapBindParameterSource implements BindParameterSource {
private final Map<String, Parameter> values;
/**
* Create a new empty {@link MapBindParameterSource}.
*/
MapBindParameterSource() {
this.values = new LinkedHashMap<>();
}
/**
* Creates a new {@link MapBindParameterSource} given {@link Map} of {@link Parameter}.
* @param values the parameter mapping
*/
MapBindParameterSource(Map<String, Parameter> values) {
Assert.notNull(values, "Values must not be null");
this.values = values;
}
/**
* Add a key-value pair to the {@link MapBindParameterSource}.
* @param paramName the name of the parameter
* @param value the parameter value to add (must not be {@code null})
*/
MapBindParameterSource addValue(String paramName, Object value) {
Assert.notNull(paramName, "Parameter name must not be null");
Assert.notNull(value, "Value must not be null");
this.values.put(paramName, Parameters.in(value));
return this;
}
@Override
public boolean hasValue(String paramName) {
Assert.notNull(paramName, "Parameter name must not be null");
return this.values.containsKey(paramName);
}
@Override
public Parameter getValue(String paramName) throws IllegalArgumentException {
if (!hasValue(paramName)) {
throw new IllegalArgumentException("No value registered for key '" + paramName + "'");
}
return this.values.get(paramName);
}
@Override
public Iterable<String> getParameterNames() {
return this.values.keySet();
}
}
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