132 lines
4.4 KiB
Java
132 lines
4.4 KiB
Java
/* Blob.java -- Access a SQL Binary Large OBject.
|
|
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package java.sql;
|
|
|
|
import java.io.InputStream;
|
|
|
|
/**
|
|
* This interface specified methods for accessing a SQL BLOB (Binary
|
|
* Large OBject) type.
|
|
*
|
|
* @author Aaron M. Renn (arenn@urbanophile.com)
|
|
*/
|
|
public interface Blob
|
|
{
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns the number of bytes in the BLOB.
|
|
*
|
|
* @return The number of bytes in the BLOB.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract long
|
|
length() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns up to the requested bytes of this BLOB as a
|
|
* <code>byte</code> array.
|
|
*
|
|
* @param offset The index into the BLOB to start returning bytes from.
|
|
* @param length The requested number of bytes to return.
|
|
*
|
|
* @return The requested bytes from the BLOB.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract byte[]
|
|
getBytes(long offset, int length) throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns a stream that will read the bytes of the BLOB.
|
|
*
|
|
* @return A stream that will read the bytes of the BLOB.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract InputStream
|
|
getBinaryStream() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns the index into the BLOB at which the first instance
|
|
* of the specified bytes occur. The searching starts at the specified
|
|
* index into the BLOB.
|
|
*
|
|
* @param pattern The byte pattern to search for.
|
|
* @param offset The index into the BLOB to starting searching for the pattern.
|
|
*
|
|
* @return The offset at which the pattern is first found, or -1 if the
|
|
* pattern is not found.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract long
|
|
position(byte[] pattern, long offset) throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns the index into the BLOB at which the first instance
|
|
* of the specified pattern occurs. The searching starts at the specified
|
|
* index into this BLOB. The bytes in the specified <code>Blob</code> are
|
|
* used as the search pattern.
|
|
*
|
|
* @param pattern The <code>Blob</code> containing the byte pattern to
|
|
* search for.
|
|
* @param offset The index into the BLOB to starting searching for the pattern.
|
|
*
|
|
* @return The offset at which the pattern is first found, or -1 if the
|
|
* pattern is not found.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract long
|
|
position(Blob pattern, long offset) throws SQLException;
|
|
|
|
} // interface Blob
|
|
|