/*
* Copyright (c) JForum Team
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* 1) Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* 2) Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* 3) Neither the name of "Rafael Steil" nor
* the names of its contributors may be used to endorse
* or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
* HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
*
* Created on Jan 26, 2005 4:42:44 PM
* The JForum Project
* http://www.jforum.net
*/
package net.jforum.dao.oracle;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.Blob;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import net.jforum.JForumExecutionContext;
import net.jforum.exceptions.DatabaseException;
import net.jforum.util.DbUtils;
import oracle.sql.BLOB;
/**
* @author Dmitriy Kiriy
* @version $Id: OracleUtils.java,v 1.14 2007/08/31 22:56:40 rafaelsteil Exp $
*/
public class OracleUtils
{
public static String readBlobUTF16BinaryStream(ResultSet rs, String fieldName) throws SQLException
{
try {
Blob clob = rs.getBlob(fieldName);
InputStream is = clob.getBinaryStream();
StringBuffer sb = new StringBuffer();
int readedBytes;
int bufferSize = 4096;
do {
byte[] bytes = new byte[bufferSize];
readedBytes = is.read(bytes);
if (readedBytes > 0) {
String readed = new String(bytes, 0, readedBytes, "UTF-16");
sb.append(readed);
}
} while (readedBytes == bufferSize);
is.close();
return sb.toString();
}
catch (IOException e) {
throw new DatabaseException(e);
}
}
/**
* The query should look like:
*
* SELECT blob_field from any_table WHERE id = ? FOR UPDATE
*
* BUT KEEP IN MIND:
*
* When you insert record in previous step, it should go with empty_blob() like:
*
* INSERT INTO jforum_posts_text ( post_text ) VALUES (EMPTY_BLOB())
*
* @param query String
* @param idForQuery int
* @param value String
* @throws SQLException
*/
public static void writeBlobUTF16BinaryStream(String query, int idForQuery, String value) throws Exception
{
PreparedStatement p = null;
ResultSet rs = null;
OutputStream blobWriter = null;
try {
p = JForumExecutionContext.getConnection().prepareStatement(query);
p.setInt(1, idForQuery);
rs = p.executeQuery();
rs.next();
Blob text = rs.getBlob(1);
if (text instanceof BLOB) {
blobWriter = ((BLOB) text).getBinaryOutputStream();
}
else {
blobWriter = text.setBinaryStream(0);
}
blobWriter.write(value.getBytes("UTF-16"));
blobWriter.close();
}
catch (IOException e) {
throw new DatabaseException(e);
}
finally {
if (blobWriter != null) {
blobWriter.close();
}
DbUtils.close(rs, p);
}
}
}