spring PostgresCallMetaDataProvider 源码
spring PostgresCallMetaDataProvider 代码
文件路径：/spring-jdbc/src/main/java/org/springframework/jdbc/core/metadata/PostgresCallMetaDataProvider.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 java.sql.Types;
import org.springframework.jdbc.core.ColumnMapRowMapper;
import org.springframework.jdbc.core.SqlOutParameter;
import org.springframework.jdbc.core.SqlParameter;
import org.springframework.lang.Nullable;
/**
* Postgres-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 PostgresCallMetaDataProvider extends GenericCallMetaDataProvider {
private static final String RETURN_VALUE_NAME = "returnValue";
public PostgresCallMetaDataProvider(DatabaseMetaData databaseMetaData) throws SQLException {
super(databaseMetaData);
}
@Override
public boolean isReturnResultSetSupported() {
return false;
}
@Override
public boolean isRefCursorSupported() {
return true;
}
@Override
public int getRefCursorSqlType() {
return Types.OTHER;
}
@Override
@Nullable
public String metaDataSchemaNameToUse(@Nullable String schemaName) {
// Use public schema if no schema specified
return (schemaName == null ? "public" : super.metaDataSchemaNameToUse(schemaName));
}
@Override
public SqlParameter createDefaultOutParameter(String parameterName, CallParameterMetaData meta) {
if (meta.getSqlType() == Types.OTHER && "refcursor".equals(meta.getTypeName())) {
return new SqlOutParameter(parameterName, getRefCursorSqlType(), new ColumnMapRowMapper());
}
else {
return super.createDefaultOutParameter(parameterName, meta);
}
}
@Override
public boolean byPassReturnParameter(String parameterName) {
return RETURN_VALUE_NAME.equals(parameterName);
}
}
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