https://github.com/spring-projects/spring-framework: Spring JDBC (Spring IO)
  • Juergen Hoeller 
/*
 * Copyright 2002-2018 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.support;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import org.springframework.jdbc.core.SqlTypeValue;
import org.springframework.lang.Nullable;


Abstract implementation of the SqlTypeValue interface, for convenient creation of type values that are supposed to be passed into the PreparedStatement.setObject method. The createTypeValue callback method has access to the underlying Connection, if that should be needed to create any database-specific objects. 
A usage example from a StoredProcedure (compare this to the plain
SqlTypeValue version in the superclass javadoc):

proc.declareParameter(new SqlParameter("myarray", Types.ARRAY, "NUMBERS"));
...
Map<String, Object> in = new HashMap<String, Object>();
in.put("myarray", new AbstractSqlTypeValue() {
  public Object createTypeValue(Connection con, int sqlType, String typeName) throws SQLException {
   oracle.sql.ArrayDescriptor desc = new oracle.sql.ArrayDescriptor(typeName, con);
   return new oracle.sql.ARRAY(desc, con, seats);
  }
});
Map out = execute(in);



Author:Juergen Hoeller
See Also:
Since:1.1
/**
 * Abstract implementation of the SqlTypeValue interface, for convenient
 * creation of type values that are supposed to be passed into the
 * {@code PreparedStatement.setObject} method. The {@code createTypeValue}
 * callback method has access to the underlying Connection, if that should
 * be needed to create any database-specific objects.
 *
 * <p>A usage example from a StoredProcedure (compare this to the plain
 * SqlTypeValue version in the superclass javadoc):
 *
 * <pre class="code">proc.declareParameter(new SqlParameter("myarray", Types.ARRAY, "NUMBERS"));
 * ...
 *
 * Map&lt;String, Object&gt; in = new HashMap&lt;String, Object&gt;();
 * in.put("myarray", new AbstractSqlTypeValue() {
 *   public Object createTypeValue(Connection con, int sqlType, String typeName) throws SQLException {
 *	   oracle.sql.ArrayDescriptor desc = new oracle.sql.ArrayDescriptor(typeName, con);
 *	   return new oracle.sql.ARRAY(desc, con, seats);
 *   }
 * });
 * Map out = execute(in);
 * </pre>
 *
 * @author Juergen Hoeller
 * @since 1.1
 * @see java.sql.PreparedStatement#setObject(int, Object, int)
 * @see org.springframework.jdbc.object.StoredProcedure
 */
public abstract class AbstractSqlTypeValue implements SqlTypeValue {

	@Override
	public final void setTypeValue(PreparedStatement ps, int paramIndex, int sqlType, @Nullable String typeName)
			throws SQLException {

		Object value = createTypeValue(ps.getConnection(), sqlType, typeName);
		if (sqlType == TYPE_UNKNOWN) {
			ps.setObject(paramIndex, value);
		}
		else {
			ps.setObject(paramIndex, value, sqlType);
		}
	}

	
Create the type value to be passed into PreparedStatement.setObject. 
Params:
  • con – the JDBC Connection, if needed to create any database-specific objects
  • sqlType – the SQL type of the parameter we are setting
  • typeName – the type name of the parameter
Throws:
  • SQLException – if an SQLException is encountered setting
parameter values (that is, there's no need to catch SQLException)
See Also:
Returns:the type value
/**
	 * Create the type value to be passed into {@code PreparedStatement.setObject}.
	 * @param con the JDBC Connection, if needed to create any database-specific objects
	 * @param sqlType the SQL type of the parameter we are setting
	 * @param typeName the type name of the parameter
	 * @return the type value
	 * @throws SQLException if an SQLException is encountered setting
	 * parameter values (that is, there's no need to catch SQLException)
	 * @see java.sql.PreparedStatement#setObject(int, Object, int)
	 */
	protected abstract Object createTypeValue(Connection con, int sqlType, @Nullable String typeName)
			throws SQLException;

}