spring SqlServerCallMetaDataProvider 源码
spring SqlServerCallMetaDataProvider 代码
文件路径：/spring-jdbc/src/main/java/org/springframework/jdbc/core/metadata/SqlServerCallMetaDataProvider.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.jdbc.core.metadata;
import java.sql.DatabaseMetaData;
import java.sql.SQLException;
import org.springframework.lang.Nullable;
/**
* SQL Server specific implementation for the {@link CallMetaDataProvider} interface.
* This class is intended for internal use by the Simple JDBC classes.
*
* @author Thomas Risberg
* @since 2.5
*/
public class SqlServerCallMetaDataProvider extends GenericCallMetaDataProvider {
private static final String REMOVABLE_COLUMN_PREFIX = "@";
private static final String RETURN_VALUE_NAME = "@RETURN_VALUE";
public SqlServerCallMetaDataProvider(DatabaseMetaData databaseMetaData) throws SQLException {
super(databaseMetaData);
}
@Override
@Nullable
public String parameterNameToUse(@Nullable String parameterName) {
if (parameterName == null) {
return null;
}
else if (parameterName.length() > 1 && parameterName.startsWith(REMOVABLE_COLUMN_PREFIX)) {
return super.parameterNameToUse(parameterName.substring(1));
}
else {
return super.parameterNameToUse(parameterName);
}
}
@Override
public boolean byPassReturnParameter(String parameterName) {
return RETURN_VALUE_NAME.equals(parameterName);
}
}
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