/*
* 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.support.xml;
import java.io.InputStream;
import java.io.Reader;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.xml.transform.Source;
import org.w3c.dom.Document;
/**
* Abstraction for handling XML fields in specific databases. Its main purpose
* is to isolate database-specific handling of XML stored in the database.
*
* <p>JDBC 4.0 introduces the new data type <code>java.sql.SQLXML</code>
* but most databases and their drivers currently rely on database-specific
* data types and features.
*
* <p>Provides accessor methods for XML fields and acts as factory for
* {@link SqlXmlValue} instances.
*
* @author Thomas Risberg
* @since 2.5.5
* @see Jdbc4SqlXmlHandler
* @see java.sql.SQLXML
* @see java.sql.ResultSet#getSQLXML
* @see java.sql.PreparedStatement#setSQLXML
*/
public interface SqlXmlHandler {
//-------------------------------------------------------------------------
// Convenience methods for accessing XML content
//-------------------------------------------------------------------------
/**
* Retrieve the given column as String from the given ResultSet.
* <p>Might simply invoke <code>ResultSet.getString</code> or work with
* <code>SQLXML</code> or database-specific classes depending on the
* database and driver.
* @param rs the ResultSet to retrieve the content from
* @param columnName the column name to use
* @return the content as String, or <code>null</code> in case of SQL NULL
* @throws SQLException if thrown by JDBC methods
* @see java.sql.ResultSet#getString
* @see java.sql.ResultSet#getSQLXML
*/
String getXmlAsString(ResultSet rs, String columnName) throws SQLException;
/**
* Retrieve the given column as String from the given ResultSet.
* <p>Might simply invoke <code>ResultSet.getString</code> or work with
* <code>SQLXML</code> or database-specific classes depending on the
* database and driver.
* @param rs the ResultSet to retrieve the content from
* @param columnIndex the column index to use
* @return the content as String, or <code>null</code> in case of SQL NULL
* @throws SQLException if thrown by JDBC methods
* @see java.sql.ResultSet#getString
* @see java.sql.ResultSet#getSQLXML
*/
String getXmlAsString(ResultSet rs, int columnIndex) throws SQLException;
/**
* Retrieve the given column as binary stream from the given ResultSet.
* <p>Might simply invoke <code>ResultSet.getAsciiStream</code> or work with
* <code>SQLXML</code> or database-specific classes depending on the
* database and driver.
* @param rs the ResultSet to retrieve the content from
* @param columnName the column name to use
* @return the content as a binary stream, or <code>null</code> in case of SQL NULL
* @throws SQLException if thrown by JDBC methods
* @see java.sql.ResultSet#getSQLXML
* @see java.sql.SQLXML#getBinaryStream
*/
InputStream getXmlAsBinaryStream(ResultSet rs, String columnName) throws SQLException;
/**
* Retrieve the given column as binary stream from the given ResultSet.
* <p>Might simply invoke <code>ResultSet.getAsciiStream</code> or work with
* <code>SQLXML</code> or database-specific classes depending on the
* database and driver.
* @param rs the ResultSet to retrieve the content from
* @param columnIndex the column index to use
* @return the content as binary stream, or <code>null</code> in case of SQL NULL
* @throws SQLException if thrown by JDBC methods
* @see java.sql.ResultSet#getSQLXML
* @see java.sql.SQLXML#getBinaryStream
*/
InputStream getXmlAsBinaryStream(ResultSet rs, int columnIndex) throws SQLException;
/**
* Retrieve the given column as character stream from the given ResultSet.
* <p>Might simply invoke <code>ResultSet.getCharacterStream</code> or work with
* <code>SQLXML</code> or database-specific classes depending on the
* database and driver.
* @param rs the ResultSet to retrieve the content from
* @param columnName the column name to use
* @return the content as character stream
* @throws SQLException if thrown by JDBC methods
* @see java.sql.ResultSet#getSQLXML
* @see java.sql.SQLXML#getCharacterStream
*/
Reader getXmlAsCharacterStream(ResultSet rs, String columnName) throws SQLException;
/**
* Retrieve the given column as character stream from the given ResultSet.
* <p>Might simply invoke <code>ResultSet.getCharacterStream</code> or work with
* <code>SQLXML</code> or database-specific classes depending on the
* database and driver.
* @param rs the ResultSet to retrieve the content from
* @param columnIndex the column index to use
* @return the content as character stream
* @throws SQLException if thrown by JDBC methods
* @see java.sql.ResultSet#getSQLXML
* @see java.sql.SQLXML#getCharacterStream
*/
Reader getXmlAsCharacterStream(ResultSet rs, int columnIndex) throws SQLException;
/**
* Retrieve the given column as Source implemented using the specified source class
* from the given ResultSet.
* <p>Might work with <code>SQLXML</code> or database-specific classes depending
* on the database and driver.
* @param rs the ResultSet to retrieve the content from
* @param columnName the column name to use
* @param sourceClass the implementation class to be used
* @return the content as character stream
* @throws SQLException if thrown by JDBC methods
* @see java.sql.ResultSet#getSQLXML
* @see java.sql.SQLXML#getSource
*/
Source getXmlAsSource(ResultSet rs, String columnName, Class sourceClass) throws SQLException;
/**
* Retrieve the given column as Source implemented using the specified source class
* from the given ResultSet.
* <p>Might work with <code>SQLXML</code> or database-specific classes depending
* on the database and driver.
* @param rs the ResultSet to retrieve the content from
* @param columnIndex the column index to use
* @param sourceClass the implementation class to be used
* @return the content as character stream
* @throws SQLException if thrown by JDBC methods
* @see java.sql.ResultSet#getSQLXML
* @see java.sql.SQLXML#getSource
*/
Source getXmlAsSource(ResultSet rs, int columnIndex, Class sourceClass) throws SQLException;
//-------------------------------------------------------------------------
// Convenience methods for building XML content
//-------------------------------------------------------------------------
/**
* Create a <code>SqlXmlValue</code> instance for the given XML data,
* as supported by the underlying JDBC driver.
* @param value the XML String value providing XML data
* @return the implementation specific instance
* @see SqlXmlValue
* @see java.sql.SQLXML#setString(String)
*/
SqlXmlValue newSqlXmlValue(String value);
/**
* Create a <code>SqlXmlValue</code> instance for the given XML data,
* as supported by the underlying JDBC driver.
* @param provider the <code>XmlBinaryStreamProvider</code> providing XML data
* @return the implementation specific instance
* @see SqlXmlValue
* @see java.sql.SQLXML#setBinaryStream()
*/
SqlXmlValue newSqlXmlValue(XmlBinaryStreamProvider provider);
/**
* Create a <code>SqlXmlValue</code> instance for the given XML data,
* as supported by the underlying JDBC driver.
* @param provider the <code>XmlCharacterStreamProvider</code> providing XML data
* @return the implementation specific instance
* @see SqlXmlValue
* @see java.sql.SQLXML#setCharacterStream()
*/
SqlXmlValue newSqlXmlValue(XmlCharacterStreamProvider provider);
/**
* Create a <code>SqlXmlValue</code> instance for the given XML data,
* as supported by the underlying JDBC driver.
* @param resultClass the Result implementation class to be used
* @param provider the <code>XmlResultProvider</code> that will provide the XML data
* @return the implementation specific instance
* @see SqlXmlValue
* @see java.sql.SQLXML#setResult(Class)
*/
SqlXmlValue newSqlXmlValue(Class resultClass, XmlResultProvider provider);
/**
* Create a <code>SqlXmlValue</code> instance for the given XML data,
* as supported by the underlying JDBC driver.
* @param doc the XML Document to be used
* @return the implementation specific instance
* @see SqlXmlValue
*/
SqlXmlValue newSqlXmlValue(Document doc);
}
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