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package org.postgresql.largeobject;
// IMPORTANT NOTE: This file implements the JDBC 2 version of the driver.
// If you make any modifications to this file, you must make sure that the
// changes are also made (if relevent) to the related JDBC 1 class in the
// org.postgresql.jdbc1 package.
import java.lang.*;
import java.io.*;
import java.math.*;
import java.text.*;
import java.util.*;
import java.sql.*;
import org.postgresql.Field;
import org.postgresql.largeobject.*;
import org.postgresql.largeobject.*;
/**
* This implements the Blob interface, which is basically another way to
* access a LargeObject.
*
* $Id: PGblob.java,v 1.2 2001/10/25 05:59:59 momjian Exp $
*
*/
public class PGblob implements java.sql.Blob
{
private org.postgresql.Connection conn;
private int oid;
private LargeObject lo;
public PGblob(org.postgresql.Connection conn, int oid) throws SQLException
{
this.conn = conn;
this.oid = oid;
LargeObjectManager lom = conn.getLargeObjectAPI();
this.lo = lom.open(oid);
}
public long length() throws SQLException
{
return lo.size();
}
public InputStream getBinaryStream() throws SQLException
{
return lo.getInputStream();
}
public byte[] getBytes(long pos, int length) throws SQLException
{
lo.seek((int)pos, LargeObject.SEEK_SET);
return lo.read(length);
}
/*
* For now, this is not implemented.
*/
public long position(byte[] pattern, long start) throws SQLException
{
throw org.postgresql.Driver.notImplemented();
}
/*
* This should be simply passing the byte value of the pattern Blob
*/
public long position(Blob pattern, long start) throws SQLException
{
return position(pattern.getBytes(0, (int)pattern.length()), start);
}
}
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