/*
* Copyright 2002-2008 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
*
* http://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;
/**
* Abstract implementation of the SqlTypeValue interface, for convenient
* creation of type values that are supposed to be passed into the
* <code>PreparedStatement.setObject</code> method. The <code>createTypeValue</code>
* 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<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);
* </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 {
public final void setTypeValue(PreparedStatement ps, int paramIndex, int sqlType, 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 <code>PreparedStatement.setObject</code>.
* @param con the JDBC Connection, if needed to create any database-specific objects
* @param sqlType SQL type of the parameter we are setting
* @param typeName the type name of the parameter
* @return the type value
* @throws SQLException if a 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, String typeName) throws SQLException;
}
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